platform/upstream/gcc.git
4 years agox86: Allow -fcf-protection with external thunk
H.J. Lu [Wed, 29 Apr 2020 11:52:46 +0000 (04:52 -0700)]
x86: Allow -fcf-protection with external thunk

Allow -fcf-protection with external thunk since the external thunk can be
made compatible with -fcf-protection.

gcc/

PR target/93654
* config/i386/i386-options.c (ix86_set_indirect_branch_type):
Allow -fcf-protection with -mindirect-branch=thunk-extern and
-mfunction-return=thunk-extern.
* doc/invoke.texi: Update notes for -fcf-protection=branch with
-mindirect-branch=thunk-extern and -mindirect-return=thunk-extern.

gcc/testsuite/

PR target/93654
* gcc.target/i386/pr93654.c: New test.

4 years agodoc: Add missing arm_arch_v8a_hard_ok anchor
Richard Sandiford [Wed, 29 Apr 2020 11:06:41 +0000 (12:06 +0100)]
doc: Add missing arm_arch_v8a_hard_ok anchor

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi: Add missing arm_arch_v8a_hard_ok anchor.

4 years agoarm: Extend the PR94780 fix to arm
Richard Sandiford [Wed, 29 Apr 2020 10:51:38 +0000 (11:51 +0100)]
arm: Extend the PR94780 fix to arm

Essentially the same fix as for x86.

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/arm/arm-builtins.c (arm_atomic_assign_expand_fenv): Use
TARGET_EXPR instead of MODIFY_EXPR for the first assignments to
fenv_var and new_fenv_var.

4 years agoarm: Fix parameter passing for [[no_unique_address]]
Richard Sandiford [Wed, 29 Apr 2020 10:51:03 +0000 (11:51 +0100)]
arm: Fix parameter passing for [[no_unique_address]]

This patch makes the ABI code ignore zero-sized [[no_unique_address]]
fields when deciding whether something is a HFA or HVA.

For the tests, I wanted an -march setting that was stable enough
to use check-function-bodies and also wanted to force -mfloat-abi=hard.
I couldn't see any existing way of doing both together, since most
arm-related effective-target keywords are agnostic about the choice
between -mfloat-abi=softfp and -mfloat-abi=hard.  I therefore added
a new effective-target keyword for this combination.

I used the arm_arch_* framework for the effective-target rather than
writing a new set of custom Tcl routines.  This has the nice property
of separating the "compile and assemble" cases from the "link and run"
cases.  I only need compilation to work for the new tests, so requiring
linking to work would be an unnecessary restriction.

However, including an ABI requirement is arguably stretching what the
list was originally intended to handle.  The name arm_arch_v8a_hard
doesn't fit very naturally with some of the NEON-based tests.
On the other hand, the naming convention isn't entirely consistent,
so any choice would be inconsistent with something.

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (arm_arch_v8a_hard_ok): Document new
effective-target keyword.
(arm_arch_v8a_hard_multilib): Likewise.
(arm_arch_v8a_hard): Document new dg-add-options keyword.
* config/arm/arm.c (arm_return_in_memory): Note that the APCS
code is deprecated and has not been updated to handle
DECL_FIELD_ABI_IGNORED.
(WARN_PSABI_EMPTY_CXX17_BASE): New constant.
(WARN_PSABI_NO_UNIQUE_ADDRESS): Likewise.
(aapcs_vfp_sub_candidate): Replace the boolean pointer parameter
avoid_cxx17_empty_base with a pointer to a bitmask.  Ignore fields
whose DECL_FIELD_ABI_IGNORED bit is set when determining whether
something actually is a HFA or HVA.  Record whether we see a
[[no_unique_address]] field that previous GCCs would not have
ignored in this way.
(aapcs_vfp_is_call_or_return_candidate): Update the calls to
aapcs_vfp_sub_candidate and report a -Wpsabi warning for the
[[no_unique_address]] case.  Use TYPE_MAIN_VARIANT in the
diagnostic messages.
(arm_needs_doubleword_align): Add a comment explaining why we
consider even zero-sized fields.

gcc/testsuite/
* lib/target-supports.exp: Add v8a_hard to the list of arm_arch_*
targets.
* g++.target/arm/no_unique_address_1.C: New test.
* g++.target/arm/no_unique_address_2.C: Likewise.

4 years agolto/94822 - fix ICE in component_ref_size
Richard Biener [Wed, 29 Apr 2020 10:21:23 +0000 (12:21 +0200)]
lto/94822 - fix ICE in component_ref_size

This ICE appears because gcc will stream it to the function_body section
when processing the variable with the initial value of the constructor
type, and the error_mark_node to the decls section.
When recompiling, the value obtained with DECL_INITIAL will be error_mark.

2020-04-29  Richard Biener  <rguenther@suse.de>
    Li Zekun  <lizekun1@huawei.com>

PR lto/94822
* tree.c (component_ref_size): Guard against error_mark_node
DECL_INITIAL as it happens with LTO.

* gcc.dg/lto/pr94822_0.c: New testcase.
* gcc.dg/lto/pr94822_1.c: Alternate file.
* gcc.dg/lto/pr94822.h: Likewise.

4 years agoaarch64: Fix parameter passing for [[no_unique_address]]
Richard Sandiford [Wed, 29 Apr 2020 09:56:49 +0000 (10:56 +0100)]
aarch64: Fix parameter passing for [[no_unique_address]]

This patch makes the ABI code ignore zero-sized [[no_unique_address]]
fields when deciding whether something is a HFA or HVA.

As things stood, we'd get two sets of -Wpsabi warnings, one when
trying to decide whether something was an SVE function, and another
when actually processing the function definition or function call.
The patch therefore makes aapcs_vfp_sub_candidate honour the
CUMULATIVE_ARGS "silent_p" flag where applicable.

This doesn't stop all duplicate warnings for parameters, and I suspect
we'll get duplicate warnings for return values too, but it should be
better than nothing.

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/aarch64/aarch64.c (aarch64_function_arg_alignment): Add a
comment explaining why we consider even zero-sized fields.
(WARN_PSABI_EMPTY_CXX17_BASE): New constant.
(WARN_PSABI_NO_UNIQUE_ADDRESS): Likewise.
(aapcs_vfp_sub_candidate): Replace the boolean pointer parameter
avoid_cxx17_empty_base with a pointer to a bitmask.  Ignore fields
whose DECL_FIELD_ABI_IGNORED bit is set when determining whether
something actually is a HFA or HVA.  Record whether we see a
[[no_unique_address]] field that previous GCCs would not have
ignored in this way.
(aarch64_vfp_is_call_or_return_candidate): Add a parameter to say
whether diagnostics should be suppressed.  Update the calls to
aapcs_vfp_sub_candidate and report a -Wpsabi warning for the
[[no_unique_address]] case.
(aarch64_return_in_msb): Update call accordingly, never silencing
diagnostics.
(aarch64_function_value): Likewise.
(aarch64_return_in_memory_1): Likewise.
(aarch64_init_cumulative_args): Likewise.
(aarch64_gimplify_va_arg_expr): Likewise.
(aarch64_pass_by_reference_1): Take a CUMULATIVE_ARGS pointer and
use it to decide whether arch64_vfp_is_call_or_return_candidate
should be silent.
(aarch64_pass_by_reference): Update calls accordingly.
(aarch64_vfp_is_call_candidate): Use the CUMULATIVE_ARGS argument
to decide whether arch64_vfp_is_call_or_return_candidate should be
silent.

gcc/testsuite/
* g++.target/aarch64/no_unique_address_1.C: New test.
* g++.target/aarch64/no_unique_address_2.C: Likewise.

4 years agotestsuite: Save dg-do-what-default in mve.exp
Richard Sandiford [Wed, 29 Apr 2020 09:40:30 +0000 (10:40 +0100)]
testsuite: Save dg-do-what-default in mve.exp

mve.exp changed the default dg-do action to "assemble", but then
left it like that for later exp files.  This meant that in a
two-multilib test run, the first arm.exp run would have a default
of "dg-do compile" and the second would have a default of
"dg-do assemble".

2020-04-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/testsuite/
* g++.target/arm/mve.exp: Restore the original dg-do-what-default
before finishing.

4 years agolibphobos: Fix KERNEL_VERSION condition in libphobos testsuite
Iain Buclaw [Wed, 29 Apr 2020 08:42:21 +0000 (10:42 +0200)]
libphobos: Fix KERNEL_VERSION condition in libphobos testsuite

A typo in the macro call meant that the #error always triggered.

libphobos/ChangeLog:

* testsuite/lib/libphobos.exp (check_effective_target_linux_pre_2639):
Fix KERNEL_VERSION condition.

4 years agod: Merge bug fix from upstream dmd 06160ccae
Iain Buclaw [Wed, 29 Apr 2020 08:19:55 +0000 (10:19 +0200)]
d: Merge bug fix from upstream dmd 06160ccae

Adds classKind information to the front-end AST, which in turn allows us
to fix code generation of type names for extern(C) and extern(C++)
structs and classes.  Inspecting such types inside a debugger now just
works without the need to 'cast(module_name.cxx_type)'.

gcc/d/ChangeLog:

* d-codegen.cc (d_decl_context): Don't include module in the name of
class and struct types that aren't extern(D).

4 years agopr94780.c fails with ICE on aarch64 [PR94820]
Haijian Zhang [Wed, 29 Apr 2020 08:23:11 +0000 (10:23 +0200)]
pr94780.c fails with ICE on aarch64 [PR94820]

This is a simple fix for pr94820.
The PR was only fixed on i386, the same error was also reported on aarch64.
This function, because it is sometimes called even outside of function bodies, uses create_tmp_var_raw rather than create_tmp_var.
But in order for that to work, when first referenced, the VAR_DECLs need to appear in a TARGET_EXPR so that during gimplification
the var gets the right DECL_CONTEXT and is added to local decls. Without that, e.g. tree-nested.c ICEs on those.

2020-04-29  Haijian Zhang  <z.zhanghaijian@huawei.com>

PR target/94820
* config/aarch64/aarch64-builtins.c
(aarch64_atomic_assign_expand_fenv): Use TARGET_EXPR instead of
MODIFY_EXPR for first assignment to fenv_cr, fenv_sr and
new_fenv_var.

4 years ago[OpenACC] Set 'acc_device_current = -1'
Thomas Schwinge [Wed, 29 Apr 2020 06:12:36 +0000 (08:12 +0200)]
[OpenACC] Set 'acc_device_current = -1'

There's no point in using value '-3', and even though not directly related,
value '-1' does match 'GOMP_DEVICE_ICV'.

libgomp/
* config/accel/openacc.f90 (acc_device_current): Set to '-1'.
* openacc.f90 (acc_device_current): Likewise.
* openacc.h (acc_device_current): Likewise.
* openacc_lib.h (acc_device_current): Likewise.

4 years agoHarden and adjust 'gcc/configure' parsing of '--enable-offload-targets'
Thomas Schwinge [Thu, 23 Apr 2020 19:59:07 +0000 (21:59 +0200)]
Harden and adjust 'gcc/configure' parsing of '--enable-offload-targets'

Fix-up for commit d228ee80f8578be474595a517a228111fac26c5e "re PR
bootstrap/92314 (missing omp-device-properties', needed by
's-omp-device-properties-h')".

gcc/
* configure.ac <$enable_offload_targets>: Do parsing as done
elsewhere.
* configure: Regenerate.

4 years ago[gcn] Fix 'omp-device-properties-gcn' handling
Thomas Schwinge [Thu, 23 Apr 2020 19:45:34 +0000 (21:45 +0200)]
[gcn] Fix 'omp-device-properties-gcn' handling

Fix-up for commit 955cd057454b323419e06affa7df7d59dc3cd1fb "Add
gcc/config/gcn/t-omp-device for OpenMP declare variant kind/arch/isa".

With AMD GCN offloading configured, I'm seeing occasional GCC build hangs.
I've now captured and analyzed one of them:

    $ ps -f
    UID        PID  PPID  C STIME TTY          TIME CMD
    [...]
    tschwing  5113  4508  0 20:24 pts/5    00:00:00 /bin/sh -c rm -f tmp-omp-device-properties.h; \ for kind in kind arch isa; do \   echo 'const char omp_offload_device_'${kind}'[] = ' \     >> tmp-omp-device-properties.h; \   for prop in no
    tschwing  5126  5113  0 20:24 pts/5    00:00:00 sed -n s/^kind: //p
    tschwing  5127  5113  0 20:24 pts/5    00:00:00 sed s/[[:blank:]]/ /g;s/  */ /g;s/^ //;s/ $//;s/ /\\0/g;s/^/"/;s/$/\\0\\0"/
    [...]
    $ pstree -p $$
    [...]---sh(5113)-+-sed(5126)
                     `-sed(5127)
    $ ls -lrt build-gcc/gcc/*omp-device*
    -rw-r--r-- 1 tschwing eeg  39 Apr 23 20:24 build-gcc/gcc/omp-device-properties-nvptx
    -rw-r--r-- 1 tschwing eeg 634 Apr 23 20:24 build-gcc/gcc/omp-device-properties-i386
    -rw-r--r-- 1 tschwing eeg  58 Apr 23 20:24 build-gcc/gcc/tmp-omp-device-properties.h

Notably missing is the 'omp-device-properties-gcn' file...

    $ grep ^ build-gcc/gcc/*omp-device*
    build-gcc/gcc/omp-device-properties-i386:kind: cpu
    build-gcc/gcc/omp-device-properties-i386:arch: x86 x86_64 i386 i486 i586 i686 ia32
    build-gcc/gcc/omp-device-properties-i386:isa: sse4 cx16 [...]
    build-gcc/gcc/omp-device-properties-nvptx:kind: gpu
    build-gcc/gcc/omp-device-properties-nvptx:arch: nvptx
    build-gcc/gcc/omp-device-properties-nvptx:isa: sm_30 sm_35
    build-gcc/gcc/tmp-omp-device-properties.h:const char omp_offload_device_kind[] =
    build-gcc/gcc/tmp-omp-device-properties.h:"amdgcn-amdhsa\0"

..., which we here seem to be intending to fill into
'tmp-omp-device-properties.h'.

    $ grep ^omp_device_properties\ = build-gcc/gcc/Makefile
    omp_device_properties =  amdgcn-amdhsa= nvptx-none=omp-device-properties-nvptx x86_64-intelmicemul-linux-gnu=omp-device-properties-i386

Given the 's-omp-device-properties-h' Makefile rule, indeed there is an
unescaped '$${props}', which is meant to be the filename following the equals
sign -- but there is none for 'amdgcn-amdhsa=', so this tries to read from
'stdin'!

The real problem of course is elsewhere.

gcc/
* configure.ac <$enable_offload_targets>: 'amdgcn' is 'gcn'.
* configure: Regenerate.

4 years ago[rtl] Harden 'set_noop_p' for non-constant selectors [PR94279]
Thomas Schwinge [Wed, 22 Apr 2020 14:58:44 +0000 (16:58 +0200)]
[rtl] Harden 'set_noop_p' for non-constant selectors [PR94279]

... given that the GCN target did away with the constant 'vec_select'
restriction.

gcc/
PR target/94279
* rtlanal.c (set_noop_p): Handle non-constant selectors.

4 years ago[gcn] Set 'UI_NONE' for 'TARGET_EXCEPT_UNWIND_INFO' [PR94282]
Thomas Schwinge [Tue, 21 Apr 2020 20:39:33 +0000 (22:39 +0200)]
[gcn] Set 'UI_NONE' for 'TARGET_EXCEPT_UNWIND_INFO' [PR94282]

In libgomp offloading testing, this resolves all the 'ld: error: undefined
symbol: __gxx_personality_v0' FAILs.

gcc/
PR target/94282
* common/config/gcn/gcn-common.c (gcn_except_unwind_info): New
function.
(TARGET_EXCEPT_UNWIND_INFO): Define.
libgomp/
PR target/94282
* testsuite/libgomp.c-c++-common/function-not-offloaded.c: Remove
'dg-allow-blank-lines-in-output'.

4 years ago[gcn] Fix build with RTL checking [PR94248]
Jakub Jelinek [Sat, 21 Mar 2020 14:39:56 +0000 (14:39 +0000)]
[gcn] Fix build with RTL checking [PR94248]

Building (for offloading) a '--target=amdgcn-amdhsa' GCC with
'--enable-checking=yes,extra,rtl' fails:

    during RTL pass: split2
    [...]/source-gcc/libgcc/libgcc2.c: In function '__absvdi2':
    [...]/source-gcc/libgcc/libgcc2.c:271:1: internal compiler error: RTL check: expected code 'reg', have 'const_int' in rhs_regno, at rtl.h:1923
      271 | }
  | ^
    0x565847 ???
    [...]/source-gcc/gcc/rtl.c:881
    0x59a8a4 ???
    [...]/source-gcc/gcc/rtl.h:1923
    0x12e3a5c ???
    [...]/source-gcc/gcc/config/gcn/gcn.md:631
    [...]
    Makefile:501: recipe for target '_absvdi2.o' failed
    make[4]: *** [_absvdi2.o] Error 1
    make[4]: Leaving directory '[...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/gfx900/libgcc'

gcc/
PR target/94248
* config/gcn/gcn.md (*mov<mode>_insn): Use
'reg_overlap_mentioned_p' to check for overlap.

Tested-by: Thomas Schwinge <thomas@codesourcery.com>
4 years ago[gcn] Don't default to building target-libstdc++-v3 [PR92713]
Thomas Schwinge [Sat, 21 Mar 2020 10:46:02 +0000 (11:46 +0100)]
[gcn] Don't default to building target-libstdc++-v3 [PR92713]

... which hasn't been ported/fails to build when using newlib (with GCC commit
b73f69020f08208d2d969fcf8879bd294a6e3596 sources, and newlib commit
6d79e0a58866548f435527798fbd4a6849d05bc7, tag: newlib-3.3.0 sources):

    In file included from [...]/build-gcc-offload-amdgcn-amdhsa/amdgcn-amdhsa/libstdc++-v3/include/csetjmp:42,
                     from [...]/source-gcc/libstdc++-v3/include/precompiled/stdc++.h:42:
    [...]/source-gcc/newlib/libc/include/setjmp.h:15:6: error: variable or field 'longjmp' declared void
       15 | void longjmp (jmp_buf __jmpb, int __retval)
          |      ^~~~~~~
    [...]
    Makefile:1824: recipe for target 'amdgcn-amdhsa/bits/stdc++.h.gch/O2ggnu++0x.gch' failed
    make[3]: *** [amdgcn-amdhsa/bits/stdc++.h.gch/O2ggnu++0x.gch] Error 1

PR target/92713
* configure.ac ["${ENABLE_LIBSTDCXX}" = "default" && amdgcn*-*-*]
(noconfigdirs): Add 'target-libstdc++-v3'.
* configure: Regenerate.

4 years ago[gcn] Use 'radeon' for the environment variable 'ACC_DEVICE_TYPE'
Thomas Schwinge [Tue, 21 Apr 2020 12:16:24 +0000 (14:16 +0200)]
[gcn] Use 'radeon' for the environment variable 'ACC_DEVICE_TYPE'

..., per OpenACC 3.0, A.1.2. "AMD GPU Targets".

This complements commit 6687d13a87c42dddc7d1c7adade38d31ba0d1401 "Rename
acc_device_gcn to acc_device_radeon".

libgomp/
* oacc-init.c (get_openacc_name): Handle 'gcn'.
* testsuite/lib/libgomp.exp
(offload_target_to_openacc_device_type) [amdgcn*]: Return
'radeon'.  Adjust all users.
(check_effective_target_openacc_amdgcn_accel_present): Rename
to...
(check_effective_target_openacc_radeon_accel_present): ... this.
Adjust all users.
(check_effective_target_openacc_amdgcn_accel_selected): Rename to...
(check_effective_target_openacc_radeon_accel_selected): ... this.
Adjust all users.

4 years agoTorture testing: 'libgomp.fortran/use_device_ptr-optional-2.f90'
Thomas Schwinge [Mon, 11 Nov 2019 10:30:33 +0000 (11:30 +0100)]
Torture testing: 'libgomp.fortran/use_device_ptr-optional-2.f90'

Fix-up for commit a2c26c50310a336361d8129ecdd43d3001d6cb3a (r278046) "Fortran]
Support absent optional args with use_device_{ptr,addr}".

libgomp/
* testsuite/libgomp.fortran/use_device_ptr-optional-2.f90: Add
'dg-do run'.

4 years agoia64: Adjust the C++14 vs. C++17 ABI thing for [[no_unique_address]] too [PR94706]
Jakub Jelinek [Wed, 29 Apr 2020 07:07:30 +0000 (09:07 +0200)]
ia64: Adjust the C++14 vs. C++17 ABI thing for [[no_unique_address]] too [PR94706]

2020-04-29  Jakub Jelinek  <jakub@redhat.com>

PR target/94706
* config/ia64/ia64.c (hfa_element_mode): Use DECL_FIELD_ABI_IGNORED
instead of cxx17_empty_base_field_p.

4 years agoc++, middle-end, rs6000: Fix C++17 ABI incompatibilities during class layout and...
Jakub Jelinek [Wed, 29 Apr 2020 07:01:49 +0000 (09:01 +0200)]
c++, middle-end, rs6000: Fix C++17 ABI incompatibilities during class layout and [[no_unique_address]] handling [PR94707]

As reported by Iain and David, powerpc-darwin and powerpc-aix* have C++14
vs. C++17 ABI incompatibilities which are not fixed by mere adding of
cxx17_empty_base_field_p calls.  Unlike the issues that were seen on other
targets where the artificial empty base field affected function argument
passing or returning of values, on these two targets the difference is
during class layout, not afterwards (e.g.
struct empty_base {};
struct S : public empty_base { unsigned long long l[2]; };
will have different __alignof__ (S) between C++14 and C++17 (or possibly
with double instead of unsigned long long too)).

I've tried:
struct X { };
struct Y { int : 0; };
struct Z { int : 0; Y y; };
struct U : public X { X q; };
struct A { float a, b, c, d; };
struct B : public X { float a, b, c, d; };
struct C : public Y { float a, b, c, d; };
struct D : public Z { float a, b, c, d; };
struct E : public U { float a, b, c, d; };
struct F { [[no_unique_address]] X x; float a, b, c, d; };
struct G { [[no_unique_address]] Y y; float a, b, c, d; };
struct H { [[no_unique_address]] Z z; float a, b, c, d; };
struct I { [[no_unique_address]] U u; float a, b, c, d; };
struct J { float a, b; [[no_unique_address]] X x; float c, d; };
struct K { float a, b; [[no_unique_address]] Y y; float c, d; };
struct L { float a, b; [[no_unique_address]] Z z; float c, d; };
struct M { float a, b; [[no_unique_address]] U u; float c, d; };
 #define T(S, s) extern S s; extern void foo##s (S); int bar##s () { foo##s (s); return 0; }
T (A, a)
T (B, b)
T (C, c)
T (D, d)
T (E, e)
T (F, f)
T (G, g)
T (H, h)
T (I, i)
T (J, j)
T (K, k)
T (L, l)
T (M, m)
testcase on powerpc64-linux.  Results:
G++ 9 -std=c++14                A, B, C passed in fprs, the rest in gprs
G++ 9 -std=c++17                A passed in fprs, the rest in gprs
current trunk -std=c++14 & 17   A, B, C passed in fprs, the rest in gprs
patched trunk -std=c++14 & 17   A, B, C, F, G, J, K passed in fprs, the rest in gprs
clang++ [*] -std=c++14 & 17     A, B, C, F, G, J, K passed in fprs, the rest in gprs
[*] clang version 11.0.0 (git@github.com:llvm/llvm-project.git 5c352e69e76a26e4eda075e20aa6a9bb7686042c)

Is that what we want?  I think it matches the stated intent of P0840R2 or
what Jason/Jonathan said, and doing something different like e.g. not
treating C, G and K as homogenous because of the int : 0 in empty bases
or in zero sized [[no_unique_address] fields would be quite hard to
implement (because for C++14 the FIELD_DECL just isn't there).

2020-04-29  Jakub Jelinek  <jakub@redhat.com>

PR target/94707
* tree-core.h (tree_decl_common): Note decl_flag_0 used for
DECL_FIELD_ABI_IGNORED.
* tree.h (DECL_FIELD_ABI_IGNORED): Define.
* calls.h (cxx17_empty_base_field_p): Change into a temporary
macro, check DECL_FIELD_ABI_IGNORED flag with no "no_unique_address"
attribute.
* calls.c (cxx17_empty_base_field_p): Remove.
* tree-streamer-out.c (pack_ts_decl_common_value_fields): Handle
DECL_FIELD_ABI_IGNORED.
* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Likewise.
* lto-streamer-out.c (hash_tree): Likewise.
* config/rs6000/rs6000-call.c (rs6000_aggregate_candidate): Rename
cxx17_empty_base_seen to empty_base_seen, change type to int *,
adjust recursive calls, use DECL_FIELD_ABI_IGNORED instead of
cxx17_empty_base_field_p, if "no_unique_address" attribute is
present, propagate that to the caller too.
(rs6000_discover_homogeneous_aggregate): Adjust
rs6000_aggregate_candidate caller, emit different diagnostics
when c++17 empty base fields are present and when empty
[[no_unique_address]] fields are present.
* config/rs6000/rs6000.c (rs6000_special_round_type_align,
darwin_rs6000_special_round_type_align): Skip DECL_FIELD_ABI_IGNORED
fields.

* class.c (build_base_field): Set DECL_FIELD_ABI_IGNORED on C++17 empty
base artificial FIELD_DECLs.
(layout_class_type): Set DECL_FIELD_ABI_IGNORED on empty class
field_poverlapping_p FIELD_DECLs.

* lto-common.c (compare_tree_sccs_1): Handle DECL_FIELD_ABI_IGNORED.

* g++.target/powerpc/pr94707-1.C: New test.
* g++.target/powerpc/pr94707-2.C: New test.
* g++.target/powerpc/pr94707-3.C: New test.
* g++.target/powerpc/pr94707-4.C: New test.
* g++.target/powerpc/pr94707-5.C: New test.
* g++.target/powerpc/pr94707-4.C: New test.

4 years agofix regression with MEM commoning
Richard Biener [Tue, 28 Apr 2020 12:36:54 +0000 (14:36 +0200)]
fix regression with MEM commoning

This fixes a regression when canonicalizing refs for LIM PR84362.
This possibly unshares and rewrites the refs in the internal data
and thus pointer equality no longer works in ref_always_accessed
computation.

2020-04-29  Richard Biener  <rguenther@suse.de>

* tree-ssa-loop-im.c (ref_always_accessed::operator ()):
Just check whether the stmt stores.

4 years agoc++: Satisfaction caching of inherited ctor [PR94819]
Patrick Palka [Wed, 29 Apr 2020 01:45:59 +0000 (21:45 -0400)]
c++: Satisfaction caching of inherited ctor [PR94819]

As observed in PR94719, an inherited constructor for an instantiation of
a constructor template confusingly has as its DECL_INHERITED_CTOR the
TEMPLATE_DECL of the constructor template rather than the particular
instantiation of the template.

This means two inherited constructors for two different instantiations
of the same constructor template have the same DECL_INHERITED_CTOR.  And
since in satisfy_declaration_constraints our decl satisfaction cache is
keyed off of the result of strip_inheriting_ctors, we may end up
conflating the satisfaction values of the two inherited constructors'
constraints.

This patch fixes this issue by using the original tree, not the result
of strip_inheriting_ctors, as the key to the decl satisfaction cache.

gcc/cp/ChangeLog:

PR c++/94819
* constraint.cc (satisfy_declaration_constraints): Use saved_t
instead of t as the key to decl_satisfied_cache.

gcc/testsuite/ChangeLog:

PR c++/94819
* g++.dg/cpp2a/concepts-inherit-ctor10.C: New test.
* g++.dg/cpp2a/concepts-inherit-ctor11.C: New test.

4 years agoc++: Parameter pack in requires parameter list [PR94808]
Patrick Palka [Wed, 29 Apr 2020 01:45:54 +0000 (21:45 -0400)]
c++: Parameter pack in requires parameter list [PR94808]

When printing the substituted parameter list of a requires-expression as
part of the "in requirements with ..." context line during concepts
diagnostics, we weren't considering that substitution into a parameter
pack can yield zero or multiple parameters.

This patch changes the way we print the parameter list of a
requires-expression in print_requires_expression_info.  We now print the
dependent form of the parameter list (along with its template parameter
mapping) instead of printing its substituted form.  Besides being an
improvement in its own, this also sidesteps the substitution issue in the
PR altogether.

gcc/cp/ChangeLog:

PR c++/94808
* error.c (print_requires_expression_info): Print the dependent
form of the parameter list with its template parameter mapping,
rather than printing the substituted form.

gcc/testsuite/ChangeLog:

PR c++/94808
* g++.dg/concepts/diagnostic12.C: New test.
* g++.dg/concepts/diagnostic5.C: Adjust dg-message.

4 years agoDaily bump.
GCC Administrator [Wed, 29 Apr 2020 00:16:19 +0000 (00:16 +0000)]
Daily bump.

4 years agolibstdc++: Fixes for feature test macros (PR 91480)
Jonathan Wakely [Tue, 28 Apr 2020 22:31:04 +0000 (23:31 +0100)]
libstdc++: Fixes for feature test macros (PR 91480)

Remove the non-standard __cpp_lib_allocator_is_always_equal macro and
add the missing macros for P1032R1.

PR libstdc++/91480
* include/bits/allocator.h (__cpp_lib_allocator_is_always_equal):
Remove non-standard macro.
* include/bits/stl_iterator.h (__cpp_lib_constexpr_iterator): Define
to indicate P1032R1 support.
* include/bits/stl_pair.h (__cpp_lib_constexpr_utility): Likewise.
* include/std/string_view (__cpp_lib_constexpr_string_view): Likewise.
* include/std/tuple (__cpp_lib_constexpr_tuple): Likewise.
* include/std/version (__cpp_lib_allocator_is_always_equal): Remove.
(__cpp_lib_constexpr_iterator, __cpp_lib_constexpr_string_view)
(__cpp_lib_constexpr_tuple, __cpp_lib_constexpr_utility): Define.
* testsuite/20_util/function_objects/constexpr_searcher.cc: Check
feature test macro.
* testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc: Likewise.
* testsuite/21_strings/basic_string_view/operations/copy/char/
constexpr.cc: Likewise.
* testsuite/24_iterators/insert_iterator/constexpr.cc: Likewise.

4 years agolibstdc++: Fix regression in std::_Construct (PR 94831)
Jonathan Wakely [Tue, 28 Apr 2020 22:26:21 +0000 (23:26 +0100)]
libstdc++: Fix regression in std::_Construct (PR 94831)

By trying to reuse the existing std::_Construct function as a wrapper
for std::construct_at I introduced regressions, because changing
std::_Construct to return non-void made it ill-formed for array types.

The solution is to revert _Construct to its former state, and change
allocator_traits::construct to explicitly call construct_at instead.
This decouples all the existing callers of _Construct from the new
construct_at requirements.

PR libstdc++/94831
* include/bits/alloc_traits.h (_S_construct): Restore placement
new-expression for C++11/14/17 and call std::construct_at directly
for C++20.
* include/bits/stl_construct.h (_Construct): Revert to non-constexpr
function returning void.
* testsuite/20_util/specialized_algorithms/
uninitialized_value_construct/94831.cc: New test.
* testsuite/23_containers/vector/cons/94831.cc: New test.

4 years ago[rs6000] fix mffsl emulation
Alexandre Oliva [Thu, 23 Apr 2020 05:19:55 +0000 (02:19 -0300)]
[rs6000] fix mffsl emulation

The emulation of mffsl with mffs, used when !TARGET_P9_MISC, is going
through the motions, but not storing the result in the given
operands[0]; it rather modifies operands[0] without effect.  It also
creates a DImode pseudo that it doesn't use, overwriting subregs
instead.

The patch below fixes all of these, the indentation and a typo.

I'm concerned about several issues in the mffsl testcase.  First, I
don't see that comparing the values as doubles rather than as long
longs is desirable.  These are FPSCR bitfields, not FP numbers.  I
understand mffs et al use double because they output to FP registers,
and the bit patterns are subnormal FP numbers, so it works, but given
the need for bit masking of at least one side, I'm changing the
compare to long longs.

Another issue with the test is that, if the compare fails, it calls
mffsl again to print the value, as if it would yield the same result.
But part of the FPSCR that mffsl (emulated with mffs or not) copies to
the output FP register is the FPCC, so the fcmpu used to compare the
result of the first mffsl will modify FPSCR and thus the result of the
second mffsl call.  After changing the compare, this is no longer the
case, but I still think it's better to make absolutely sure what we
print is what we compared.

Yet another issue is that the test assumed the mffs bits that are not
to be extracted by mffsl to be already zero, instead of masking them
out explicitly.  This is not about the mffs emulation in the mffsl
implementation, but about the mffs use in the test proper.  The bits
appear to be zero indeed, as the bits left out are for sticky
exceptions, but there are reserved parts of FPSCR that might turn out
to be set in the future, so we're better off masking them out
explicitly, otherwise those bits could cause the compare to fail.

If some future mffsl is changed so that it copies additional nonzero
bits, the test will fail, and then we'll have a chance to adjust it
and the emulation.

for  gcc/ChangeLog

PR target/94812
* gcc/config/rs6000/rs6000.md (rs6000_mffsl): Copy result to
output operand in emulation.  Don't overwrite pseudos.

for  gcc/testsuite/ChangeLog

PR target/94812
* gcc.target/powerpc/test_mffsl.c: Call mffsl only once.
Reinterpret the doubles as long longs for compares.  Mask out
mffs bits that are not expected from mffsl.

4 years agolibstdc++: Fix subrange::advance and subrange::prev (LWG 3433)
Patrick Palka [Tue, 28 Apr 2020 20:34:24 +0000 (16:34 -0400)]
libstdc++: Fix subrange::advance and subrange::prev (LWG 3433)

This implements the proposed resolution of LWG 3433, which fixes
subrange::advance when called with a negative argument.

libstdc++-v3/ChangeLog:

LWG 3433 subrange::advance(n) has UB when n < 0
* include/std/ranges (subrange::prev): Fix typo.
(subrange::advance): Handle a negative argument as per the proposed
resolution of LWG 3433.
* testsuite/std/ranges/subrange/lwg3433.cc: New test.

4 years agoFix some testsuite failures for H8/SX multilibs where short branches where used when...
Jeff Law [Tue, 28 Apr 2020 20:34:45 +0000 (16:34 -0400)]
Fix some testsuite failures for H8/SX multilibs where short branches where used when long branches were necessary.

* config/h8300/h8300.md (H8/SX mult patterns): All H8/SX specific
multiply patterns are 4 bytes long.

4 years agolibphobos: Fix multilib powerpc64 builds
Iain Buclaw [Tue, 28 Apr 2020 19:42:41 +0000 (21:42 +0200)]
libphobos: Fix multilib powerpc64 builds

Multilibs should not have been split up as two logically different CPU,
so at configure time, powerpc64 was being detected, but none of the
32-bit support files were being compiled in.

libphobos/ChangeLog:

PR d/94825
* configure: Regenerate.
* libdruntime/Makefile.am (DRUNTIME_SOURCES_CONFIGURED): Add both
switchcontext.S and callwithstack.S if DRUNTIME_CPU_POWERPC.
* libdruntime/Makefile.in: Regenerate.
* libdruntime/config/powerpc/switchcontext.S: Add !__PPC64__ guards.
* libdruntime/config/powerpc64/callwithstack.S: Add __PPC64__ guards.
* m4/druntime/cpu.m4 (DRUNTIME_CPU_SOURCES): Define DRUNTIME_CPU_POWER
for all powerpc biarchs.  Remove DRUNTIME_CPU_POWER64 conditional.

4 years agoc++: Redeclaration of implicit operator== [PR94583]
Jason Merrill [Tue, 28 Apr 2020 16:27:27 +0000 (12:27 -0400)]
c++: Redeclaration of implicit operator== [PR94583]

My last patch rejected a namespace-scope declaration of the
implicitly-declared friend operator== before the class, but redeclaring it
after the class should be OK.

gcc/cp/ChangeLog
2020-04-28  Jason Merrill  <jason@redhat.com>

PR c++/94583
* decl.c (use_eh_spec_block): Check nothrow type after
DECL_DEFAULTED_FN.
* pt.c (maybe_instantiate_noexcept): Call synthesize_method for
DECL_MAYBE_DELETED fns here.
* decl2.c (mark_used): Not here.
* method.c (get_defaulted_eh_spec): Reject DECL_MAYBE_DELETED here.

4 years agoanalyzer: fix ICE copying struct [PR 94816]
David Malcolm [Tue, 28 Apr 2020 14:52:45 +0000 (10:52 -0400)]
analyzer: fix ICE copying struct [PR 94816]

PR analyzer/94816 reports an ICE when attempting to copy a struct
containing a field for which add_region_for_type for fails (on
an OFFSET_TYPE): the region for the src field comes from
make_region_for_unexpected_tree_code which gives it a NULL type, and
then the copy calls add_region_for_type which unconditionally
dereferences the NULL type.

This patch fixes the ICE by checking for NULL types in
add_region_for_type.

gcc/analyzer/ChangeLog:
PR analyzer/94816
* engine.cc (impl_region_model_context::on_unexpected_tree_code):
Handle NULL tree.
* region-model.cc (region_model::add_region_for_type): Handle
NULL type.
* region-model.h
(test_region_model_context::on_unexpected_tree_code): Handle NULL
tree.

gcc/testsuite/ChangeLog:
PR analyzer/94816
* g++.dg/analyzer/pr94816.C: New test.

4 years ago[arm] Remove +nofp from -mcpu=cortex-m55 options
Kyrylo Tkachov [Tue, 28 Apr 2020 15:21:31 +0000 (16:21 +0100)]
[arm] Remove +nofp from -mcpu=cortex-m55 options

Turns out for consistency with LLVM the +nofp option shouldn't remove ALL of FP and MVE, just the FP part of MVE.
This requires more surgery with feature bits so for GCC 10 I'd rather just not support +nofp for -mcpu=cortex-m55
and implement it properly for GCC 11.

2020-04-28  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

* config/arm/arm-cpus.in (cortex-m55): Remove +nofp option.
* doc/invoke.texi (Arm Options): Remove -mcpu=cortex-m55 from +nofp option.

4 years ago[Arm] Account for C++17 artificial field determining Homogeneous Aggregates
Matthew Malcomson [Tue, 28 Apr 2020 14:38:43 +0000 (15:38 +0100)]
[Arm] Account for C++17 artificial field determining Homogeneous Aggregates

In C++14, an empty class deriving from an empty base is not an
aggregate, while in C++17 it is.  In order to implement this, GCC adds
an artificial field to such classes.

This artificial field has no mapping to Fundamental Data Types in the
Arm PCS ABI and hence should not count towards determining whether an
object can be passed using the vector registers as per section
"7.1.2 Procedure Calling" in the arm PCS
https://developer.arm.com/docs/ihi0042/latest?_ga=2.60211309.1506853196.1533541889-405231439.1528186050

This patch avoids counting this artificial field in
aapcs_vfp_sub_candidate, and hence calculates whether such objects
should be passed in vector registers in the same manner as C++14 (where
the artificial field does not exist).

Before this change, the test below would pass the arguments to `f` in
general registers.  After this change, the test passes the arguments to
`f` using the vector registers.

The new behaviour matches the behaviour of `armclang`, and also matches
the GCC behaviour when run with `-std=gnu++14`.

> gcc -std=gnu++17 -march=armv8-a+simd -mfloat-abi=hard test.cpp

``` test.cpp
struct base {};

struct pair : base
{
  float first;
  float second;
  pair (float f, float s) : first(f), second(s) {}
};

void f (pair);
int main()
{
  f({3.14, 666});
  return 1;
}
```

We add a `-Wpsabi` warning to catch cases where this fix has changed the ABI for
some functions.  Unfortunately this warning is not emitted twice for multiple
calls to the same function, but I feel this is not much of a problem and can be
fixed later if needs be.

(i.e. if `main` called `f` twice in a row we only emit a diagnostic for the
first).

Testing:
    Bootstrapped and regression tested on arm-linux.
    This change fixes the struct-layout-1 tests Jakub added
    https://gcc.gnu.org/pipermail/gcc-patches/2020-April/544204.html
    Regression tested on arm-none-eabi.

gcc/ChangeLog:

2020-04-28  Matthew Malcomson  <matthew.malcomson@arm.com>
    Jakub Jelinek  <jakub@redhat.com>

PR target/94711
* config/arm/arm.c (aapcs_vfp_sub_candidate): Account for C++17 empty
base class artificial fields.
(aapcs_vfp_is_call_or_return_candidate): Warn when PCS ABI
decision is different after this fix.

4 years agoanalyzer: remove -Wanalyzer-use-of-uninitialized-value for GCC 10
David Malcolm [Fri, 24 Apr 2020 01:31:22 +0000 (21:31 -0400)]
analyzer: remove -Wanalyzer-use-of-uninitialized-value for GCC 10

From what I can tell -Wanalyzer-use-of-uninitialized-value has not
yet found a true diagnostic in real-world code, and seems to be
particularly susceptible to false positives.  These relate to bugs in
the region_model code.

For GCC 10 it seems best to remove this warning, which this patch does.
Internally it also removes POISON_KIND_UNINIT.

I'm working on a rewrite of the region_model code for GCC 11 that I
hope will fix these issues, and allow this warning to be reintroduced.

gcc/analyzer/ChangeLog:
PR analyzer/94447
PR analyzer/94639
PR analyzer/94732
PR analyzer/94754
* analyzer.opt (Wanalyzer-use-of-uninitialized-value): Delete.
* program-state.cc (selftest::test_program_state_dumping): Update
expected dump result for removal of "uninit".
* region-model.cc (poison_kind_to_str): Delete POISON_KIND_UNINIT
case.
(root_region::ensure_stack_region): Initialize stack with null
svalue_id rather than with a typeless POISON_KIND_UNINIT value.
(root_region::ensure_heap_region): Likewise for the heap.
(region_model::dump_summary_of_rep_path_vars): Remove
summarization of uninit values.
(region_model::validate): Remove check that the stack has a
POISON_KIND_UNINIT value.
(poisoned_value_diagnostic::emit): Remove POISON_KIND_UNINIT
case.
(poisoned_value_diagnostic::describe_final_event): Likewise.
(selftest::test_dump): Update expected dump result for removal of
"uninit".
(selftest::test_svalue_equality): Remove "uninit" and "freed".
* region-model.h (enum poison_kind): Remove POISON_KIND_UNINIT.

gcc/ChangeLog:
PR analyzer/94447
PR analyzer/94639
PR analyzer/94732
PR analyzer/94754
* doc/invoke.texi (Static Analyzer Options): Remove
-Wanalyzer-use-of-uninitialized-value.
(-Wno-analyzer-use-of-uninitialized-value): Remove item.

gcc/testsuite/ChangeLog:
PR analyzer/94447
PR analyzer/94639
PR analyzer/94732
PR analyzer/94754
* gcc.dg/analyzer/data-model-1.c: Mark "use of uninitialized
value" warnings as xfail for now.
* gcc.dg/analyzer/data-model-5b.c: Remove uninitialized warning.
* gcc.dg/analyzer/pr94099.c: Mark "uninitialized" warning as xfail
for now.
* gcc.dg/analyzer/pr94447.c: New test.
* gcc.dg/analyzer/pr94639.c: New test.
* gcc.dg/analyzer/pr94732.c: New test.
* gcc.dg/analyzer/pr94754.c: New test.
* gcc.dg/analyzer/zlib-6.c: Mark "uninitialized" warning as xfail
for now.

4 years agoFix missing gcc/ChangeLog entry from fa29cf0c3f19b648e30b16fd2485c3c17a528a6e
David Malcolm [Tue, 28 Apr 2020 13:23:05 +0000 (09:23 -0400)]
Fix missing gcc/ChangeLog entry from fa29cf0c3f19b648e30b16fd2485c3c17a528a6e

4 years agoCheck whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work first
H.J. Lu [Tue, 28 Apr 2020 12:42:34 +0000 (05:42 -0700)]
Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work first

GCC_CET_HOST_FLAGS uses -Wl,-z,ibt,-z,shstk to check if Linux/x86 host
has Intel CET enabled by introducing an Intel CET violation on purpose.
To avoid false positive, check whether -Wl,-z,ibt,-z,shstk works first.
-fcf-protection=none is added to avoid false negative when -fcf-protection
is enabled by default.

config/

PR bootstrap/94739
* cet.m4 (GCC_CET_HOST_FLAGS): Add -fcf-protection=none to
-Wl,-z,ibt,-z,shstk.  Check whether -fcf-protection=none
-Wl,-z,ibt,-z,shstk works first.

libiberty/

PR bootstrap/94739
* configure: Regenerated.

lto-plugin/

PR bootstrap/94739
* configure: Regenerated.

4 years agotree: Fix up TREE_SIDE_EFFECTS on internal calls [PR94809]
Jakub Jelinek [Tue, 28 Apr 2020 09:26:56 +0000 (11:26 +0200)]
tree: Fix up TREE_SIDE_EFFECTS on internal calls [PR94809]

On the following testcase, match.pd during GENERIC folding
changes the -1U / x < y into __imag__ .MUL_OVERFLOW (x, y),
but unfortunately unlike for normal calls nothing sets TREE_SIDE_EFFECTS on
the call.  There is the process_call_operands function that non-internal
call creation calls and it is usable for internal calls too,
e.g. TREE_SIDE_EFFECTS is derived from checking whether the
call has side-effects (non-ECF_{CONST,PURE}; we have those for internal
calls) and from whether any of the arguments has TREE_SIDE_EFFECTS.

2020-04-28  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/94809
* tree.c (build_call_expr_internal_loc_array): Call
process_call_operands.

* gcc.c-torture/execute/pr94809.c: New test.

4 years agoaarch64: Add TX3 machine model
Anton Youdkevitch [Tue, 28 Apr 2020 08:55:34 +0000 (09:55 +0100)]
aarch64: Add TX3 machine model

Here is the patch introducing thunderx3t110 machine model
for the scheduler. A name for the new chip was added to the
list of the names to be recognized as a valid parameter for
mcpu and mtune flags. Added the TX3 tuning table and cost
model tables.

Added the new chip name to the documentation. Fixed copyright
names and dates.

Lowering the chip capabilities to v8.3 to be on the safe side.

Bootstrapped on AArch64.

2020-04-27 Anton Youdkevitch <anton.youdkevitch@bell-sw.com>

        * config/aarch64/aarch64-cores.def: Add the chip name.
        * config/aarch64/aarch64-tune.md: Regenerated.
        * config/aarch64/aarch64.c: Add tuning table for the chip.
        * gcc/config/aarch64/aarch64-cost-tables.h: Add cost tables.
        * config/aarch64/thunderx3t110.md: New file: add the new
        machine model for the scheduler
        * config/aarch64/aarch64.md: Include the new model.
        * doc/invoke.texi: Add the new name to the list

4 years agos390: -Wpsabi diagnostics for C++14 vs. C++17 ABI incompatibility on s390{,x} [PR94704]
Jakub Jelinek [Tue, 28 Apr 2020 08:26:24 +0000 (10:26 +0200)]
s390: -Wpsabi diagnostics for C++14 vs. C++17 ABI incompatibility on s390{,x} [PR94704]

> We probably have to look into providing a -Wpsabi warning as well.

So like this?

2020-04-28  Jakub Jelinek  <jakub@redhat.com>

PR target/94704
* config/s390/s390.c (s390_function_arg_vector,
s390_function_arg_float): Emit -Wpsabi diagnostics if the ABI changed.

4 years agovect: Fix COND_EXPRs involving variant booleans [PR94727]
Richard Sandiford [Tue, 28 Apr 2020 07:04:29 +0000 (08:04 +0100)]
vect: Fix COND_EXPRs involving variant booleans [PR94727]

The previous patch for this PR handled separate comparisons.
However, as arm targets show, the same fix is needed when
handling comparisons embedded in a VEC_COND_EXPR.

Here too, the problem is that vect_get_constant_vectors will
calculate its own vector type, using truth_type_for on the
STMT_VINFO_VECTYPE, and the vectoriable_* routines need to be
consistent with that.

2020-04-28  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
PR tree-optimization/94727
* tree-vect-stmts.c (vect_is_simple_cond): If both comparison
operands are invariant booleans, use the mask type associated with the
STMT_VINFO_VECTYPE.  Use !slp_node instead of !vectype to exclude SLP.
(vectorizable_condition): Pass vectype unconditionally to
vect_is_simple_cond.

4 years agocoroutines: Pass class ref to traits lookup and promise allocator [PR94760].
Iain Sandoe [Tue, 28 Apr 2020 01:15:07 +0000 (02:15 +0100)]
coroutines: Pass class ref to traits lookup and promise allocator [PR94760].

We changed the argument passed to the promise parameter preview
to match a reference to *this.  However to be consistent with the
other ports, we do need to match the reference transformation in
the traits lookup and the promise allocator lookup.

gcc/cp/ChangeLog:

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94760
* coroutines.cc (instantiate_coro_traits): Pass a reference to
object type rather than a pointer type for 'this', for method
coroutines.
(struct param_info): Add a field to hold that the parm is a lambda
closure pointer.
(morph_fn_to_coro): Check for lambda closure pointers in the
args.  Use a reference to *this when building the args list for the
promise allocator lookup.

gcc/testsuite/ChangeLog:

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94760
* g++.dg/coroutines/pr94760-mismatched-traits-and-promise-prev.C:
New test.

4 years agocoroutines: Fix handling of non-class coroutine returns [PR94759]
Iain Sandoe [Mon, 27 Apr 2020 23:27:47 +0000 (00:27 +0100)]
coroutines: Fix handling of non-class coroutine returns [PR94759]

From the standard:

The header <coroutine> defines the primary template coroutine_traits
such that if ArgTypes is a parameter pack of types and if the
qualified-id R::promise_type is valid and denotes a type, then
coroutine_traits<R,ArgTypes...> has the following publicly accessible
member:
     using promise_type = typename R::promise_type;

this should not prevent more specialised cases and  the following
code should be accepted, but is currently rejected with:

'error: coroutine return type ‘void’ is not a class'

This is because the check for non-class-ness of the return value was
in the wrong place; it needs to be carried out in a SFINAE context.

The following patch removes the restriction in the traits template
instantiation and allows for the case that the ramp function could
return void.

The <coroutine> header is amended to implement the required
functionality.

gcc/cp/ChangeLog:

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94759
* coroutines.cc (coro_promise_type_found_p): Do not
exclude non-classes here (this needs to be handled in the
coroutine header).
(morph_fn_to_coro):  Allow for the case where the coroutine
returns void.

gcc/testsuite/ChangeLog:

2020-04-28  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94759
* g++.dg/coroutines/coro-bad-alloc-00-bad-op-new.C: Adjust for
updated error messages.
* g++.dg/coroutines/coro-bad-alloc-01-bad-op-del.C: Likewise.
* g++.dg/coroutines/coro-bad-alloc-02-no-op-new-nt.C: Likewise.
* g++.dg/coroutines/coro-missing-promise.C: Likewise.
* g++.dg/coroutines/pr93458-5-bad-coro-type.C: Liekwise.
* g++.dg/coroutines/torture/co-ret-17-void-ret-coro.C: New test.

libstdc++-v3/ChangeLog:

2020-04-28  Jonathan Wakely  <jwakely@redhat.com>
    Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94759
* include/std/coroutine: Implement handing for non-
class coroutine return types.

4 years agoDaily bump.
GCC Administrator [Tue, 28 Apr 2020 00:16:18 +0000 (00:16 +0000)]
Daily bump.

4 years agocoroutines: Fix for uses of structured binding [PR94701]
Iain Sandoe [Mon, 27 Apr 2020 22:55:00 +0000 (23:55 +0100)]
coroutines: Fix for uses of structured binding [PR94701]

Structured binding makes use of the DECL_VALUE_EXPR fields
in local variables.  We need to recognise these and only amend
the expression values, retaining the 'alias' value intact.

gcc/cp/ChangeLog:

2020-04-27  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94701
* coroutines.cc (struct local_var_info): Add fields for static
variables and those with DECL_VALUE_EXPR redirection.
(transform_local_var_uses):  Skip past typedefs and static vars
and then account for redirected variables.
(register_local_var_uses): Likewise.

gcc/testsuite/ChangeLog:

2020-04-27  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94701
* g++.dg/coroutines/torture/local-var-06-structured-binding.C: New test.

4 years agoRevert r10-7920-g06eca1acafa27e19e82dc73927394a7a4d0bdbc5 .
Thomas Koenig [Mon, 27 Apr 2020 21:49:36 +0000 (23:49 +0200)]
Revert r10-7920-g06eca1acafa27e19e82dc73927394a7a4d0bdbc5 .

2020-04-27  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/93956
PR fortran/94788
* expr.c (gfc_check_pointer_assign): Revert patch for PR 93956.
* interface.c: Likewise.

2020-04-27  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/93956
PR fortran/94788
* gfortran.dg/pointer_assign_13.f90: Remove.

4 years agolibphobos: Backport extern(C) bindings from druntime 2.091
Iain Buclaw [Mon, 27 Apr 2020 21:33:18 +0000 (23:33 +0200)]
libphobos: Backport extern(C) bindings from druntime 2.091

Merge upstream druntime 47688279.

Reviewed-on: https://github.com/dlang/druntime/pull/3073

Fixes: PR d/90718
Fixes: PR d/90719

libphobos/ChangeLog:

* libdruntime/Makefile.am (DRUNTIME_DSOURCES_LINUX): Remove
core/sys/linux/sys/netinet/tcp.d.
* libdruntime/Makefile.in: Regenerate.

4 years agox86: Fix up ix86_atomic_assign_expand_fenv [PR94780]
Jakub Jelinek [Mon, 27 Apr 2020 19:14:52 +0000 (21:14 +0200)]
x86: Fix up ix86_atomic_assign_expand_fenv [PR94780]

This function, because it is sometimes called even outside of function
bodies, uses create_tmp_var_raw rather than create_tmp_var.  But in order
for that to work, when first referenced, the VAR_DECLs need to appear in a
TARGET_EXPR so that during gimplification the var gets the right
DECL_CONTEXT and is added to local decls.  Without that, e.g. tree-nested.c
ICEs on those.

2020-04-27  Jakub Jelinek  <jakub@redhat.com>

PR target/94780
* config/i386/i386.c (ix86_atomic_assign_expand_fenv): Use
TARGET_EXPR instead of MODIFY_EXPR for first assignment to
sw_var, exceptions_var, mxcsr_orig_var and mxcsr_mod_var.

* gcc.dg/pr94780.c: New test.

4 years agoc++: Avoid ICE with dependent attribute on type.
Jason Merrill [Mon, 27 Jan 2020 10:45:01 +0000 (05:45 -0500)]
c++: Avoid ICE with dependent attribute on type.

We previously happened to accept this testcase, but never actually did
anything useful with the attribute.  The patch for PR86379 stopped using
TREE_TYPE as USING_DECL_SCOPE, so 'using A::b' no longer had TREE_TYPE set,
so the language-independent decl_attributes started crashing on it.

GNU attributes are more flexible in their placement than C++11 attributes,
so if we encounter a dependent GNU attribute that syntactically appertains
to a type rather than the declaration as a whole, move it to the
declaration; that's almost certainly what the user meant, anyway.

gcc/cp/ChangeLog
2020-04-27  Jason Merrill  <jason@redhat.com>

PR c++/90750
PR c++/79585
* decl.c (grokdeclarator): Move dependent attribute to decl.
* decl2.c (splice_template_attributes): No longer static.

4 years agoRegenerate gcc.pot.
Joseph Myers [Mon, 27 Apr 2020 21:20:49 +0000 (21:20 +0000)]
Regenerate gcc.pot.

* gcc.pot: Regenerate.

4 years agoc++: Delegating constructor in constexpr init [PR94772]
Patrick Palka [Mon, 27 Apr 2020 21:06:35 +0000 (17:06 -0400)]
c++: Delegating constructor in constexpr init [PR94772]

In the first testcase below, the call to the target constructor foo{} from foo's
delegating constructor is encoded as the INIT_EXPR

  *(struct foo *) this = AGGR_INIT_EXPR <4, __ct_comp, D.2140, ...>;

During initialization of the variable 'bar', we prematurely set TREE_READONLY on
bar's CONSTRUCTOR in two places before the outer delegating constructor has
returned: first, at the end of cxx_eval_call_expression after evaluating the RHS
of the above INIT_EXPR, and second, at the end of cxx_eval_store_expression
after having finished evaluating the above INIT_EXPR.  This then prevents the
rest of the outer delegating constructor from mutating 'bar'.

This (hopefully minimally risky) patch makes cxx_eval_call_expression refrain
from setting TREE_READONLY when evaluating the target constructor of a
delegating constructor.  It also makes cxx_eval_store_expression refrain from
setting TREE_READONLY when the object being initialized is "*this', on the basis
that it should be the responsibility of the routine that set 'this' in the first
place to set the object's TREE_READONLY appropriately.

gcc/cp/ChangeLog:

PR c++/94772
* constexpr.c (cxx_eval_call_expression): Don't set new_obj if we're
evaluating the target constructor of a delegating constructor.
(cxx_eval_store_expression): Don't set TREE_READONLY if the LHS of the
INIT_EXPR is '*this'.

gcc/testsuite/ChangeLog:

PR c++/94772
* g++.dg/cpp1y/constexpr-tracking-const23.C: New test.
* g++.dg/cpp1y/constexpr-tracking-const24.C: New test.
* g++.dg/cpp1y/constexpr-tracking-const25.C: New test.

4 years agoUpdate gcc fr.po, sv.po.
Joseph Myers [Mon, 27 Apr 2020 21:01:41 +0000 (21:01 +0000)]
Update gcc fr.po, sv.po.

4 years agoFix warning URLs for Fortran and analyzer [PR 92830]
David Malcolm [Thu, 5 Dec 2019 19:47:35 +0000 (14:47 -0500)]
Fix warning URLs for Fortran and analyzer [PR 92830]

PR 92830 reports that we always use "gcc/Warning-Options.html" when we
emit escaped documentation URLs when printing "[-Wname-of-option]" for
a warning.

This page is wrong for most Fortran warnings, and for analyzer warnings.

I considered various schemes involving adding extra tags to the .opt
format to capture where options are documented, but for now this patch
fixes the issue by introducing some special-casing logic.
It only fixes the URLs for warning options, not for other command-line
options, but those are the only options for which get_option_url is
currently called.

gcc/ChangeLog:
PR 92830
* configure.ac (DOCUMENTATION_ROOT_URL): Drop trailing "gcc/" from
default value, so that it can by supplied by get_option_html_page.
* configure: Regenerate.
* opts.c: Include "selftest.h".
(get_option_html_page): New function.
(get_option_url): Use it.  Reformat to place comments next to the
expressions they refer to.
(selftest::test_get_option_html_page): New.
(selftest::opts_c_tests): New.
* selftest-run-tests.c (selftest::run_tests): Call
selftest::opts_c_tests.
* selftest.h (selftest::opts_c_tests): New decl.

4 years agodemangler: Handle <=> operator in the demangler [PR94797]
Jakub Jelinek [Mon, 27 Apr 2020 18:59:25 +0000 (20:59 +0200)]
demangler: Handle <=> operator in the demangler [PR94797]

The demangler didn't handle spaceship operator.

2020-04-27  Jakub Jelinek  <jakub@redhat.com>

PR demangler/94797
* cp-demangle.c (cplus_demangle_operators): Add ss <=> operator.
* testsuite/demangle-expected: Add operator<=> test.

4 years agoaarch64: disable test on ilp32 [PR94697]
Szabolcs Nagy [Mon, 27 Apr 2020 17:07:59 +0000 (18:07 +0100)]
aarch64: disable test on ilp32 [PR94697]

branch-protection=pac-ret is not supported on ilp32 now and
the test requires it via branch-protection=standard.

committed as obvious.

gcc/testsuite/ChangeLog:

PR target/94697
* gcc.target/aarch64/pr94697.c: Require lp64.

4 years agoarm: Fix an rtl checking failure in cde-errors.c
Richard Sandiford [Mon, 27 Apr 2020 16:25:20 +0000 (17:25 +0100)]
arm: Fix an rtl checking failure in cde-errors.c

cde-errors.c and cde-mve-error-2.c were failing with an rtl checking
failure because we applied UINTVAL to a nonconstant argument
(specifically a REG).

2020-04-27  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/arm/arm-builtins.c (arm_expand_builtin_args): Only apply
UINTVAL to CONST_INTs.

4 years ago[GCC][PATCH][ARM]: Change arm constraint name from "e" to "Te".
Srinath Parvathaneni [Mon, 27 Apr 2020 15:50:58 +0000 (16:50 +0100)]
[GCC][PATCH][ARM]: Change arm constraint name from "e" to "Te".

This patches changes the constraint "e" to "Te".

gcc/ChangeLog:

2020-04-24  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

* config/arm/constraints.md (e): Remove constraint.
(Te): Define constraint.
* config/arm/mve.md (vaddvq_<supf><mode>): Modify constraint in
operand 0 from "e" to "Te".
(vaddvaq_<supf><mode>): Likewise.
(vaddvq_p_<supf><mode>): Likewise.
(vmladavq_<supf><mode>): Likewise.
(vmladavxq_s<mode>): Likewise.
(vmlsdavq_s<mode>): Likewise.
(vmlsdavxq_s<mode>): Likewise.
(vaddvaq_p_<supf><mode>): Likewise.
(vmladavaq_<supf><mode>): Likewise.
(vmladavq_p_<supf><mode>): Likewise.
(vmladavxq_p_s<mode>): Likewise.
(vmlsdavq_p_s<mode>): Likewise.
(vmlsdavxq_p_s<mode>): Likewise.
(vmlsdavaxq_s<mode>): Likewise.
(vmlsdavaq_s<mode>): Likewise.
(vmladavaxq_s<mode>): Likewise.
(vmladavaq_p_<supf><mode>): Likewise.
(vmladavaxq_p_s<mode>): Likewise.
(vmlsdavaq_p_s<mode>): Likewise.
(vmlsdavaxq_p_s<mode>): Likewise.

4 years agoc-family: Fix ICE on __builtin_speculation_safe_value () [PR94755]
Jakub Jelinek [Mon, 27 Apr 2020 14:05:03 +0000 (16:05 +0200)]
c-family: Fix ICE on __builtin_speculation_safe_value () [PR94755]

When this builtin has no parameters, speculation_safe_value_resolve_call
returns BUILT_IN_NONE, but resolve_overloaded_builtin uselessly
dereferences the first param just to return error_mark_node immediately.

The following patch rearranges it so that we only read the first parameter
if fncode is not BUILT_IN_NONE.

2020-04-27  Jakub Jelinek  <jakub@redhat.com>

PR c/94755
* c-common.c (resolve_overloaded_builtin): Return error_mark_node for
fncode == BUILT_IN_NONE before initialization of first_param.

* c-c++-common/pr94755.c: New test.

4 years agoarm: Fix bootstrap failure with rtl-checking
Andre Vieira [Mon, 27 Apr 2020 13:54:46 +0000 (14:54 +0100)]
arm: Fix bootstrap failure with rtl-checking

The code change that caused this regression was not meant to affect neon
code-gen, however I missed the REG fall through.  This patch makes sure we only
get the left-hand of the PLUS if it is indeed a PLUS expr.

gcc/ChangeLog:
2020-04-27  Andre Vieira  <andre.simoesdiasvieira@arm.com>

* config/arm/arm.c (output_move_neon): Only get the first operand if
addr is PLUS.

4 years agoforwprop: Fix ICE when building an identity constructor [PR94784]
Fei Yang [Mon, 27 Apr 2020 10:08:04 +0000 (11:08 +0100)]
forwprop: Fix ICE when building an identity constructor [PR94784]

In the testcase for PR94784, we have two vectors with the same ABI identity
but with different TYPE_MODEs. It would be better to flip the assert around
so that it checks that the two vectors have equal TYPE_VECTOR_SUBPARTS and
that converting the corresponding element types is a useless_type_conversion_p.

2020-04-27  Felix Yang  <felix.yang@huawei.com>

gcc/
PR tree-optimization/94784
* tree-ssa-forwprop.c (simplify_vector_constructor): Flip the
assert around so that it checks that the two vectors have equal
TYPE_VECTOR_SUBPARTS and that converting the corresponding element
types is a useless_type_conversion_p.

gcc/testsuite/
PR tree-optimization/94784
* gcc.dg/pr94784.c: New test.

4 years agoaarch64: Fix .cfi_window_save with pac-ret [PR94515]
Szabolcs Nagy [Mon, 27 Apr 2020 08:07:15 +0000 (09:07 +0100)]
aarch64: Fix .cfi_window_save with pac-ret [PR94515]

On aarch64 -mbranch-protection=pac-ret reuses the dwarf
opcode for window_save to mean "toggle the return address
mangle state", but in the dwarf2cfi internal logic the
state was not updated when an opcode was emitted, the
currently present update logic is only valid for the
original sparc use of window_save so a separate bool is
used on aarch64 to track the state.

This bug can cause the unwinder not to authenticate return
addresses that were signed (or vice versa) which means a
runtime crash on a pauth enabled system.

Currently only aarch64 pac-ret uses REG_CFA_TOGGLE_RA_MANGLE.

This should be backported to gcc-9 and gcc-8 branches.

gcc/ChangeLog:

PR target/94515
* dwarf2cfi.c (struct GTY): Add ra_mangled.
(cfi_row_equal_p): Check ra_mangled.
(dwarf2out_frame_debug_cfa_window_save): Remove the argument,
this only handles the sparc logic now.
(dwarf2out_frame_debug_cfa_toggle_ra_mangle): New function for
the aarch64 specific logic.
(dwarf2out_frame_debug): Update to use the new subroutines.
(change_cfi_row): Check ra_mangled.

gcc/testsuite/ChangeLog:

PR target/94515
* g++.target/aarch64/pr94515-1.C: New test.
* g++.target/aarch64/pr94515-2.C: New test.

4 years agos390: Fix C++14 vs. C++17 ABI incompatibility on s390{,x} [PR94704]
Jakub Jelinek [Mon, 27 Apr 2020 07:11:57 +0000 (09:11 +0200)]
s390: Fix C++14 vs. C++17 ABI incompatibility on s390{,x} [PR94704]

The following patch fixes the C++14 vs. C++17 ABI passing incompatibility
on s390x-linux.

Bootstrapped/regtested on s390x-linux without and with the patch, the
difference being:
-FAIL: tmpdir-g++.dg-struct-layout-1/t032 cp_compat_x_alt.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t032 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t032 cp_compat_x_tst.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t055 cp_compat_x_alt.o-cp_compat_y_alt.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t055 cp_compat_x_alt.o-cp_compat_y_tst.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t055 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t055 cp_compat_x_tst.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t056 cp_compat_x_alt.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t056 cp_compat_x_alt.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t056 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t056 cp_compat_x_tst.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t057 cp_compat_x_alt.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t057 cp_compat_x_alt.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t057 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t057 cp_compat_x_tst.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t058 cp_compat_x_alt.o-cp_compat_y_alt.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t058 cp_compat_x_alt.o-cp_compat_y_tst.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t058 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t058 cp_compat_x_tst.o-cp_compat_y_tst.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t059 cp_compat_x_alt.o-cp_compat_y_alt.o execute
 FAIL: tmpdir-g++.dg-struct-layout-1/t059 cp_compat_x_alt.o-cp_compat_y_tst.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t059 cp_compat_x_tst.o-cp_compat_y_alt.o execute
-FAIL: tmpdir-g++.dg-struct-layout-1/t059 cp_compat_x_tst.o-cp_compat_y_tst.o execute
when performing ALT_CXX_UNDER_TEST=g++ testing with a system GCC 10 compiler
from a week ago.  So, the alt vs. alt FAILs are all expected (we know before
this patch there is an ABI incompatibility) and some alt vs. tst (or tst vs.
alt) FAILs too - that depends on if the particular x or y test is compiled
with -std=c++14 or -std=c++17 - if x_tst is compiled with -std=c++14 and
y_alt is compiled with -std=c++17, then it should FAIL, similarly if x_alt
is compiled with -std=c++17 and y_tst is compiled with -std=c++14.

2020-04-27  Jakub Jelinek  <jakub@redhat.com>

PR target/94704
* config/s390/s390.c (s390_function_arg_vector,
s390_function_arg_float): Ignore cxx17_empty_base_field_p fields.

4 years agors6000: enable -fweb for small loops unrolling
guojiufu [Mon, 27 Apr 2020 06:08:20 +0000 (14:08 +0800)]
rs6000: enable -fweb for small loops unrolling

Previously -fweb was disabled if only unroll small loops.  After that
we find there is cases where it could help to rename pseudos and avoid
some anti-dependence which may occur after unroll.

This patch enables -fweb for small loops unrolling.

2020-04-27  Jiufu Guo   <guojiufu@cn.ibm.com>

* common/config/rs6000/rs6000-common.c
(rs6000_option_optimization_table) [OPT_LEVELS_ALL]: Remove turn off
-fweb.
* config/rs6000/rs6000.c (rs6000_option_override_internal): Avoid to
set flag_web.

4 years agoRS6000: Use .machine ppc for some CRT files
Sebastian Huber [Mon, 6 Apr 2020 20:30:21 +0000 (22:30 +0200)]
RS6000: Use .machine ppc for some CRT files

Since commit e154242724b084380e3221df7c08fcdbd8460674 the flag -many is
sometimes not passed to the assembler.  Use .machine ppc to prevent
errors if these files are assembled for an ISA which does not support
FPRs.

libgcc/

* config/rs6000/crtresfpr.S: Use .machine ppc.
* config/rs6000/crtresxfpr.S: Likewise.
* config/rs6000/crtsavfpr.S: Likewise.

4 years agoDo not remove ifunc_resolver in LTO.
Martin Liska [Mon, 27 Apr 2020 04:44:29 +0000 (06:44 +0200)]
Do not remove ifunc_resolver in LTO.

PR lto/94659
* cgraph.h (cgraph_node::can_remove_if_no_direct_calls_and_refs_p):
Do not remove ifunc_resolvers in remove unreachable nodes in LTO.

4 years agors6000: Don't use HARD_FRAME_POINTER_REGNUM if it's not live in pro_and_epilogue...
Xionghu Luo [Mon, 27 Apr 2020 01:37:27 +0000 (20:37 -0500)]
rs6000: Don't use HARD_FRAME_POINTER_REGNUM if it's not live in pro_and_epilogue (PR91518)

This bug is exposed by FRE refactor of r263875.  Comparing the fre
dump file shows no obvious change of the segment fault function proves
it to be a target issue.
frame_pointer_needed is set to true in reload pass setup_can_eliminate,
but regs_ever_live[31] is false, pro_and_epilogue uses it without live
check causing CPU2006 465.tonto segment fault of loading from invalid
addresses due to r31 not saved/restored.  Thus, add HARD_FRAME_POINTER_REGNUM
live check with frame_pointer_needed_indeed when generating pro_and_epilogue
instructions.

gcc/ChangeLog

2020-04-27  Xiong Hu Luo  <luoxhu@linux.ibm.com>

PR target/91518
* config/rs6000/rs6000-logue.c (frame_pointer_needed_indeed):
New variable.
(rs6000_emit_prologue_components):
Check with frame_pointer_needed_indeed.
(rs6000_emit_epilogue_components): Likewise.
(rs6000_emit_prologue): Likewise.
(rs6000_emit_epilogue): Set frame_pointer_needed_indeed.

4 years agoFix CL dates.
Marek Polacek [Mon, 27 Apr 2020 01:17:18 +0000 (21:17 -0400)]
Fix CL dates.

4 years agoc++: Explicit constructor called in copy-initialization [PR90320]
Marek Polacek [Thu, 23 Apr 2020 00:12:47 +0000 (20:12 -0400)]
c++: Explicit constructor called in copy-initialization [PR90320]

This test is rejected with a bogus "use of deleted function" error
starting with r225705 whereby convert_like_real/ck_base no longer
sets LOOKUP_ONLYCONVERTING for user_conv_p conversions.  This does
not seem to be always correct.  To recap, when we have something like
T t = x where T is a class type and the type of x is not T or derived
from T, we perform copy-initialization, something like:
  1. choose a user-defined conversion to convert x to T, the result is
     a prvalue,
  2. use this prvalue to direct-initialize t.

In the second step, explicit constructors should be considered, since
we're direct-initializing.  This is what r225705 fixed.

In this PR we are dealing with the first step, I think, where explicit
constructors should be skipped.  [over.match.copy] says "The converting
constructors of T are candidate functions" which clearly eliminates
explicit constructors.  But we also have to copy-initialize the argument
we are passing to such a converting constructor, and here we should
disregard explicit constructors too.

In this testcase we have

  V v = m;

and we choose V::V(M) to convert m to V.  But we wrongly choose
the explicit M::M<M&>(M&) to copy-initialize the argument; it's
a better match for a non-const lvalue than the implicit M::M(const M&)
but because it's explicit, we shouldn't use it.

When convert_like is processing the ck_user conversion -- the convfn is
V::V(M) -- it can see that cand->flags contains LOOKUP_ONLYCONVERTING,
but then when we're in build_over_call for this convfn, we have no way
to pass the flag to convert_like for the argument 'm', because convert_like
doesn't take flags.  Fixed by creating a new conversion flag, copy_init_p,
set in ck_base/ck_rvalue to signal that explicit constructors should be
skipped.

LOOKUP_COPY_PARM looks relevant, but again, it's a LOOKUP_* flag, so
can't pass it to convert_like.  DR 899 also seemed related, but that
deals with direct-init contexts only.

PR c++/90320
* call.c (struct conversion): Add copy_init_p.
(standard_conversion): Set copy_init_p in ck_base and ck_rvalue
if FLAGS demands LOOKUP_ONLYCONVERTING.
(convert_like_real) <case ck_base>: If copy_init_p is set, or
LOOKUP_ONLYCONVERTING into FLAGS.

* g++.dg/cpp0x/explicit13.C: New test.
* g++.dg/cpp0x/explicit14.C: New test.

4 years agolibphobos: Add hppa-*-linux* as a supported target
Iain Buclaw [Mon, 27 Apr 2020 00:41:08 +0000 (02:41 +0200)]
libphobos: Add hppa-*-linux* as a supported target

libphobos/ChangeLog:

2020-04-27  Iain Buclaw  <ibuclaw@gdcproject.org>

* configure.tgt: Add hppa-*-linux* as a supported target.

4 years agolibphobos: Remove AC_CACHE_CHECK from network library tests.
Iain Buclaw [Mon, 27 Apr 2020 00:09:43 +0000 (02:09 +0200)]
libphobos: Remove AC_CACHE_CHECK from network library tests.

libphobos/ChangeLog:

* configure: Regenerate.
* m4/druntime/libraries.m4 (DRUNTIME_LIBRARIES_NET): Remove
AC_CACHE_CHECK, simplify by setting LIBS directly.

4 years agod: Merge upstream dmd f8a1a5153, druntime 2b5c0b27
Iain Buclaw [Sun, 26 Apr 2020 23:43:34 +0000 (01:43 +0200)]
d: Merge upstream dmd f8a1a5153, druntime 2b5c0b27

Adds a new test directive COMPILABLE_MATH_TEST, and support has been
added for it in gdc-convert-test so that they are skipped if phobos is
not present on the target.

Only change in D runtime is a small documentation fix.

Reviewed-on: https://github.com/dlang/druntime/pull/3067
     https://github.com/dlang/dmd/pull/11060

gcc/testsuite/ChangeLog:

PR d/89418
* lib/gdc-utils.exp (gdc-convert-test): Add dg-skip-if for compilable
tests that depend on the phobos standard library.

4 years agod: Fix ICE in assign_temp, at function.c:984 (PR94777)
Iain Buclaw [Sun, 26 Apr 2020 21:39:32 +0000 (23:39 +0200)]
d: Fix ICE in assign_temp, at function.c:984 (PR94777)

Named arguments were being passed around by invisible reference, just
not variadic arguments.  There is a need to de-duplicate the routines
that handle declaration/parameter promotion and reference checking.
However for now, the parameter helper functions have just been renamed
to parameter_reference_p and parameter_type, to make it more clear that
it is the Parameter equivalent to declaration_reference_p and
declaration_type.

On writing the tests, a forward-reference bug was discovered on x86_64
during va_list type semantic.  This was due to fields not having their
parent set-up correctly.

gcc/d/ChangeLog:

PR d/94777
* d-builtins.cc (build_frontend_type): Set parent for generated
fields of built-in types.
* d-codegen.cc (argument_reference_p): Rename to ...
(parameter_reference_p): ... this.
(type_passed_as): Rename to ...
(parameter_type): ... this.  Make TREE_ADDRESSABLE types restrict.
(d_build_call): Move handling of non-POD types here from ...
* d-convert.cc (convert_for_argument): ... here.
* d-tree.h (argument_reference_p): Rename declaration to ...
(parameter_reference_p): ... this.
(type_passed_as): Rename declaration to ...
(parameter_type): ... this.
* types.cc (TypeVisitor::visit (TypeFunction *)): Update caller.

gcc/testsuite/ChangeLog:

PR d/94777
* gdc.dg/pr94777a.d: New test.
* gdc.dg/pr94777b.d: New test.

4 years agoDaily bump.
GCC Administrator [Mon, 27 Apr 2020 00:16:17 +0000 (00:16 +0000)]
Daily bump.

4 years agocoroutines: Do not assume parms are named [PR94752].
Iain Sandoe [Sun, 26 Apr 2020 18:34:50 +0000 (19:34 +0100)]
coroutines: Do not assume parms are named [PR94752].

Parameters to user-defined coroutines might be unnamed.
In that case, we must synthesize a name for the coroutine
frame copy.

gcc/cp/ChangeLog:

2020-04-26  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94752
* coroutines.cc (morph_fn_to_coro): Ensure that
unnamed function params have a usable and distinct
frame field name.

gcc/testsuite/ChangeLog:

2020-04-26  Iain Sandoe  <iain@sandoe.co.uk>

PR c++/94752
* g++.dg/coroutines/pr94752.C: New test.

4 years agoAdded test case from PR 94737.
Thomas Koenig [Sun, 26 Apr 2020 12:57:16 +0000 (14:57 +0200)]
Added test case from PR 94737.

2020-04-26  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94737
* gfortran.dg/binding_label_tests_34.f90: New test case.

4 years agoAdd ChangeLog changes from previous commit, r10-7920.
Thomas Koenig [Sun, 26 Apr 2020 12:51:01 +0000 (14:51 +0200)]
Add ChangeLog changes from previous commit, r10-7920.

PR fortran/93956

4 years agolibphobos: Add power*-*-linux* as a supported target
Iain Buclaw [Sun, 26 Apr 2020 09:32:57 +0000 (11:32 +0200)]
libphobos: Add power*-*-linux* as a supported target

libphobos/ChangeLog:

* configure: Regenerate.
* configure.tgt: Add power*-*-linux* as a supported target, only
building libdruntime.
* m4/druntime/cpu.m4 (DRUNTIME_CPU_SOURCES): Add cases for powerpcle
and powerpc64le target cpus.

4 years agoAdd changelog entry for previous commit
Iain Buclaw [Sun, 26 Apr 2020 09:32:39 +0000 (11:32 +0200)]
Add changelog entry for previous commit

4 years agod: Recognize pragma(inline) in the code generator.
Iain Buclaw [Mon, 30 Mar 2020 22:19:18 +0000 (00:19 +0200)]
d: Recognize pragma(inline) in the code generator.

Pragma inline affects whether functions are inlined or not.  If at the
declaration level, it affects the functions declared in the block it
controls.  If inside a function, it affects the function it is enclosed
by.  Support has been in the front-end for some time, but the
information was not leveraged by the code generation pass.

gcc/d/ChangeLog:

* decl.cc (get_symbol_decl): Set DECL_DECLARED_INLINE_P or
DECL_UNINLINABLE for declarations with pragma(inline).
* toir.cc (IRVisitor::visit (GccAsmStatement *)): Set ASM_INLINE_P if
in function decorated with pragma(inline).

4 years agors6000: Don't push stack frame for AIX when debugging and -fcompare-debug.
David Edelsohn [Thu, 9 Apr 2020 16:43:22 +0000 (12:43 -0400)]
rs6000: Don't push stack frame for AIX when debugging and -fcompare-debug.

AIX pushes a stack frame when debugging is enabled.  With -fcompare-debug
this generates comparison failures because code geneation is different.
This patch disables the stack push for -fcompare-debug that only is used
for internal testing and not for normal debug information generation that
will be consumed by AIX tools.

This patch also removes xfails from testsuite testcases that use
-fcompare-debug and no longer fail on AIX without the stack push difference.

        * config/rs6000/rs6000-logue.c (rs6000_stack_info): Don't push a
        stack frame when debugging and flag_compare_debug is enabled.

testsuite/
        * g++.dg/debug/dwarf2/pr61433.C: Unfail AIX.
        * g++.dg/opt/pr48549.C: Same.
        * g++.dg/opt/pr60002.C: Same.
        * g++.dg/opt/pr80436.C: Same.
        * g++.dg/opt/pr83084.C: Same.
        * g++.dg/other/pr42685.C: Same.
        * gcc.dg/pr41241.c: Same.
        * gcc.dg/pr42629.c: Same.
        * gcc.dg/pr42630.c: Same.
        * gcc.dg/pr42719.c: Same.
        * gcc.dg/pr42728.c: Same.
        * gcc.dg/pr42889.c: Same.
        * gcc.dg/pr42916.c: Same.
        * gcc.dg/pr43084.c: Same.
        * gcc.dg/pr43670.c: Same.
        * gcc.dg/pr44023.c: Same.
        * gcc.dg/pr44971.c: Same.
        * gcc.dg/pr45449.c: Same.
        * gcc.dg/pr46771.c: Same.
        * gcc.dg/pr47684.c: Same.
        * gcc.dg/pr47881.c: Same.
        * gcc.dg/pr48768.c: Same.
        * gcc.dg/pr50017.c: Same.
        * gcc.dg/pr56023.c: Same.
        * gcc.dg/pr64935-1.c: Same.
        * gcc.dg/pr64935-2.c: Same.
        * gcc.dg/pr65521.c: Same.
        * gcc.dg/pr65779.c: Same.
        * gcc.dg/pr65980.c: Same.
        * gcc.dg/pr66688.c: Same.
        * gcc.dg/pr70405.c: Same.
        * gcc.dg/vect/pr49352.c: Same.

4 years agoDaily bump.
GCC Administrator [Sun, 26 Apr 2020 00:16:21 +0000 (00:16 +0000)]
Daily bump.

4 years agotestsuite: Add -Wno-psabi option for ipa-sra-19.c on AIX.
David Edelsohn [Sat, 25 Apr 2020 23:27:14 +0000 (19:27 -0400)]
testsuite: Add -Wno-psabi option for ipa-sra-19.c on AIX.

ipa-sra-19.c uses a vector type that elicits a non-standard ABI warning
on AIX causing a spurious testsuite failure.

        * gcc.dg/ipa/ipa-sra-19.c: Add -Wno-psabi option on AIX.

4 years agotestsuite: spellcheck-options-21.c requires LTO
David Edelsohn [Sat, 25 Apr 2020 23:03:33 +0000 (19:03 -0400)]
testsuite: spellcheck-options-21.c requires LTO

spellcheck-options-21.c requires LTO supported on the target.

        * gcc.dg/spellcheck-options-21.c: Require LTO.

4 years agotestsuite: Skip pr82718-1.c and pr82718-2.c DWARF 5 tests on AIX.
David Edelsohn [Sat, 25 Apr 2020 21:11:54 +0000 (17:11 -0400)]
testsuite: Skip pr82718-1.c and pr82718-2.c DWARF 5 tests on AIX.

AIX 7.2 XCOFF does not support DWARF 5 sections.  Skip the explicit
DWARF 5 tests that emit the new loc_lists and range_lists sections.

        * gcc.dg/debug/dwarf2/pr82718-1.c: Skip on AIX.
        * gcc.dg/debug/dwarf2/pr82718-2.c: Skip on AIX.

4 years agolibffi/test: Fix compilation for build sysroot
Maciej W. Rozycki [Sat, 25 Apr 2020 20:27:14 +0000 (21:27 +0100)]
libffi/test: Fix compilation for build sysroot

Fix a problem with the libffi testsuite using a method to determine the
compiler to use resulting in the tool being different from one the
library has been built with, and causing a catastrophic failure from the
inability to actually choose any compiler at all in a cross-compilation
configuration.

Address this problem by providing a DejaGNU configuration file defining
the compiler to use, via the CC_FOR_TARGET TCL variable, set from $CC by
autoconf, which will have all the required options set for the target
compiler to build executables in the environment configured, removing
failures like:

FAIL: libffi.call/closure_fn0.c -W -Wall -Wno-psabi -O0 (test for excess errors)
Excess errors:
default_target_compile: No compiler to compile with
UNRESOLVED: libffi.call/closure_fn0.c -W -Wall -Wno-psabi -O0 compilation failed to produce executable

and bringing overall test results for the `riscv64-linux-gnu' target
(here with the `x86_64-linux-gnu' host and RISC-V QEMU in the Linux user
emulation mode as the target board) from:

=== libffi Summary ===

# of unexpected failures 708
# of unresolved testcases 708
# of unsupported tests 30

to:

=== libffi Summary ===

# of expected passes 1934
# of unsupported tests 28

This is a combined backport of the relevant parts of upstream libffi
changes as follows:

- commit 8308984e479e ("[PATCH] Make sure we're running dejagnu tests
  with the right compiler."),

- commit 2d9b3939751b ("[PATCH] Fix for closures with sunpro compiler"),

- commit 0c3824702d3d ("[PATCH] Always set CC_FOR_TARGET for dejagnu, to
  make the testsuite respect $CC"),

- commit 7d698125b1f0 ("[PATCH] Use the proper C++ compiler to run C++
  tests"),

- commit 6b6df1a7bb37 ("[PATCH] Adds `local.exp` to CLEANFILES"),

- commit 6cf0dea78a5a ("[PATCH] Change CLEANFILES to DISTCLEANFILES")

libffi/
* Makefile.am (DISTCLEANFILES): New variable.
* configure.ac: Produce `local.exp'.
* Makefile.in: Regenerate.
* configure: Regenerate.
* testsuite/Makefile.am (EXTRA_DEJAGNU_SITE_CONFIG): New
variable.
* testsuite/Makefile.in: Regenerate.

4 years agoEnable Intel CET in liblto_plugin.so on Intel CET enabled host
H.J. Lu [Sat, 25 Apr 2020 17:06:59 +0000 (10:06 -0700)]
Enable Intel CET in liblto_plugin.so on Intel CET enabled host

Since ld is Intel CET enabled on Intel CET enabled host, dlopen fails on
liblto_plugin.so if it isn't Intel CET enabled.  Add GCC_CET_HOST_FLAGS
to cet.m4, use it in libiberty and lto-plugin to always enable Intel
CET in liblto_plugin.so on Intel CET enabled host.

On Linux/x86 host, enable Intel CET by default if assembler and compiler
support Intel CET so that the generated liblto_plugin.so can be used on
both CET and non-CET machines.  It is an error to disable Intel CET in
liblto_plugin.so on Intel CET enabled host.

config/

PR bootstrap/94739
* cet.m4 (GCC_CET_HOST_FLAGS): New.

libiberty/

PR bootstrap/94739
* Makefile.in (COMPILE.c): Add @CET_HOST_FLAGS@.
(configure_deps): Add $(srcdir)/../config/cet.m4 and
$(srcdir)/../config/enable.m4.
* aclocal.m4: Include ../config/cet.m4 and ../config/enable.m4.
* configure.ac: Add GCC_CET_HOST_FLAGS(CET_HOST_FLAGS) and
AC_SUBST(CET_HOST_FLAGS).
* configure: Regenerated.

lto-plugin/

PR bootstrap/94739
* Makefile.am (AM_CFLAGS): Add $(CET_HOST_FLAGS).
* configure.ac: Add GCC_CET_HOST_FLAGS(CET_HOST_FLAGS) and
AC_SUBST(CET_HOST_FLAGS).
* Makefile.in: Regenerated.
* aclocal.m4: Likewise.
* configure: Likewise.

4 years agoFix PR 94578.
Thomas König [Sat, 25 Apr 2020 10:28:15 +0000 (12:28 +0200)]
Fix PR 94578.

Our intrinsics do not handle spans on their return values (yet),
so this creates a temporary for subref array pointers.

2020-04-25  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94578
* trans-expr.c (arrayfunc_assign_needs_temporary): If the
LHS is a subref pointer, we also need a temporary.

2020-04-25  Thomas Koenig  <tkoenig@gcc.gnu.org>

PR fortran/94578
* gfortran.dg/pointer_assign_14.f90: New test.
* gfortran.dg/pointer_assign_15.f90: New test.

4 years agocoroutines, testsuite: Enable a test.
Iain Sandoe [Sat, 25 Apr 2020 09:55:10 +0000 (10:55 +0100)]
coroutines, testsuite: Enable a test.

This just enables a test that can now be run since we've
resolved the PRs blocking it.

2020-04-25  Iain Sandoe  <iain@sandoe.co.uk>

* g++.dg/coroutines/torture/co-ret-16-simple-control-flow.C:
Enable test.

4 years agoTurn on -mpcrel by default for -mcpu=future
Michael Meissner [Sat, 25 Apr 2020 06:43:10 +0000 (02:43 -0400)]
Turn on -mpcrel by default for -mcpu=future

2020-04-25  Michael Meissner  <meissner@linux.ibm.com>

* config/rs6000/linux64.h (PCREL_SUPPORTED_BY_OS): Define to
enable PC-relative addressing for -mcpu=future.
* config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS_SERVER): Move
after OTHER_FUTURE_MASKS.  Use OTHER_FUTURE_MASKS.
* config/rs6000/rs6000.c (PCREL_SUPPORTED_BY_OS): If not defined,
suppress PC-relative addressing.
(rs6000_option_override_internal): Split up error messages
checking for -mprefixed and -mpcrel.  Enable -mpcrel if the target
system supports it.

4 years agoc++: implicit operator== with previous decl [PR94583]
Jason Merrill [Fri, 24 Apr 2020 20:27:26 +0000 (16:27 -0400)]
c++: implicit operator== with previous decl [PR94583]

P2085 clarified that a defaulted comparison operator must be the first
declaration of the function.  Rejecting that avoids the ICE trying to
compare the noexcept-specifications.

gcc/cp/ChangeLog
2020-04-24  Jason Merrill  <jason@redhat.com>

PR c++/94583
* decl.c (redeclaration_error_message): Reject defaulted comparison
operator that has been previously declared.

4 years agoc++: add "'requires' only available with ..." note
Patrick Palka [Sat, 25 Apr 2020 01:16:59 +0000 (21:16 -0400)]
c++: add "'requires' only available with ..." note

This adds a note suggesting to enable concepts whenever 'requires' is parsed as
an invalid type name with concepts disabled.

gcc/cp/ChangeLog:

* parser.c (cp_parser_diagnose_invalid_type_name): Suggest enabling
concepts if the invalid identifier is 'requires'.

gcc/testsuite/ChangeLog:

* g++.dg/concepts/diagnostic11.C: New test.

4 years agod: Merge upstream dmd 09db0c41e, druntime e68a5ae3.
Iain Buclaw [Sat, 25 Apr 2020 00:19:04 +0000 (02:19 +0200)]
d: Merge upstream dmd 09db0c41e, druntime e68a5ae3.

* New core.math.toPrec templates have been added as an intrinsic.

  Some floating point algorithms, such as Kahan-Babuska-Neumaier
  Summation, require rounding to specific precisions. Rounding to
  precision after every operation, however, loses overall precision in
  the general case and is a runtime performance problem.

  Adding these functions guarantee the rounding at required points in
  the code, and document where in the algorithm the requirement exists.

* Support IBM long double types in core.internal.convert.

* Add missing aliases for 64-bit vectors in core.simd.

* RUNNABLE_PHOBOS_TEST directive has been properly integrated into the
  D2 language testsuite.

Reviewed-on: https://github.com/dlang/druntime/pull/3063
     https://github.com/dlang/dmd/pull/11054

gcc/d/ChangeLog:

* intrinsics.cc (expand_intrinsic_toprec): New function.
(maybe_expand_intrinsic): Handle toPrec intrinsics.
* intrinsics.def (TOPRECF, TOPREC, TOPRECL): Add toPrec intrinsics.

4 years agoDaily bump.
GCC Administrator [Sat, 25 Apr 2020 00:16:17 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Avoid -Wreturn-type warning if a template fn calls noreturn template fn [PR94742]
Jakub Jelinek [Fri, 24 Apr 2020 22:11:35 +0000 (00:11 +0200)]
c++: Avoid -Wreturn-type warning if a template fn calls noreturn template fn [PR94742]

finish_call_expr already has code to set current_function_returns_abnormally
if a template calls a noreturn function, but on the following testcase it
doesn't call a FUNCTION_DECL, but TEMPLATE_DECL instead, in which case
we didn't check noreturn at all and just assumed it could return.

2020-04-25  Jakub Jelinek  <jakub@redhat.com>

PR c++/94742
* semantics.c (finish_call_expr): When looking if all overloads
are noreturn, use STRIP_TEMPLATE to look through TEMPLATE_DECLs.

* g++.dg/warn/Wreturn-type-12.C: New test.

4 years agocselim: Don't assume it is safe to cstore replace a store to a local variable with...
Jakub Jelinek [Fri, 24 Apr 2020 22:10:01 +0000 (00:10 +0200)]
cselim: Don't assume it is safe to cstore replace a store to a local variable with unknown offset [PR94734]

As the new testcase shows, it is not safe to assume we can optimize
a conditional store into an automatic non-addressable var, we can do it
only if we can prove that the unconditional load or store actually will
not be outside of the boundaries of the variable.
If the offset and size are constant, we can, but this is already all
checked in !tree_could_trap_p, otherwise we really need to check for
a dominating unconditional store, or for the specific case of automatic
non-addressable variables, it is enough if there is a dominating load
(that is what those 4 testcases have).  tree-ssa-phiopt.c has some
infrastructure for this already, see the add_or_mark_expr method etc.,
but right now it handles only MEM_REFs with SSA_NAME first operand
and some integral offset.  So, I think it can be for GCC11 extended
to handle other memory references, possibly up to just doing
get_inner_reference and hasing based on the base, offset expressions
and bit_offset and bit_size, and have also a special case that for
!TREE_ADDRESSABLE automatic variables it could ignore whether something
is a load or store because the local stack should be always writable.
But it feels way too dangerous to do this this late for GCC10, so this
patch just restricts the optimization to the safe case (where lhs doesn't
trap), and on Richi's request also ignores TREE_ADDRESSABLE bit if
flag_store_data_races, because my understanding the reason for
TREE_ADDRESSABLE check is that we want to avoid introducing
store data races (if address of an automatic var escapes, some other thread
could be accessing it concurrently).

2020-04-25  Jakub Jelinek  <jakub@redhat.com>
    Richard Biener  <rguenther@suse.de>

PR tree-optimization/94734
PR tree-optimization/89430
* tree-ssa-phiopt.c: Include tree-eh.h.
(cond_store_replacement): Return false if an automatic variable
access could trap.  If -fstore-data-races, don't return false
just because an automatic variable is addressable.

* gcc.dg/tree-ssa/pr89430-1.c: Add xfail.
* gcc.dg/tree-ssa/pr89430-2.c: Add xfail.
* gcc.dg/tree-ssa/pr89430-5.c: Add xfail.
* gcc.dg/tree-ssa/pr89430-6.c: Add xfail.
* gcc.c-torture/execute/pr94734.c: New test.

4 years agod: Fix order of precedence for -defaultlib and -debuglib
Iain Buclaw [Fri, 24 Apr 2020 21:39:32 +0000 (23:39 +0200)]
d: Fix order of precedence for -defaultlib and -debuglib

The order of precedence used by the upstream reference compiler for
determining what library to link against is:
- No library if -nophoboslib or -fno-druntime was seen.
- The library passed to -debuglib if -g was also seen.
- The library passed to -defaultlib
- The in-tree libgphobos library.

This aligns the D language driver to follow the same rules.

gcc/d/ChangeLog:

* d-spec.cc (need_phobos): Remove.
(lang_specific_driver): Replace need_phobos with phobos_library.
Reorder -debuglib and -defaultlib to have precedence over libphobos.
(lang_specific_pre_link): Remove test for need_phobos.

4 years agoamdgcn: Fix wrong-code bug in 64-bit masked add
Andrew Stubbs [Thu, 19 Mar 2020 17:44:59 +0000 (17:44 +0000)]
amdgcn: Fix wrong-code bug in 64-bit masked add

2020-04-24  Andrew Stubbs  <ams@codesourcery.com>

gcc/
* config/gcn/gcn-valu.md (add<mode>_zext_dup2_exec): Fix merge
of high-part.
(add<mode>_sext_dup2_exec): Likewise.

4 years agors6000: Properly handle LE index munging in vec_shr (PR94710)
Segher Boessenkool [Fri, 24 Apr 2020 13:33:14 +0000 (13:33 +0000)]
rs6000: Properly handle LE index munging in vec_shr (PR94710)

The PR shows the compiler crashing with -mvsx -mlittle -O0.  This turns
out to be caused by a failure to make of the higher bits in an index
endian conversion.

2020-04-24  Segher Boessenkool  <segher@kernel.crashing.org>

PR target/94710
* config/rs6000/vector.md (vec_shr_<mode> for VEC_L): Correct little
endian byteshift_val calculation.

4 years agotestsuite: C++14 vs. C++17 struct-layout-1.exp testing with ALT_CXX_UNDER_TEST [PR94383]
Jakub Jelinek [Fri, 24 Apr 2020 17:14:27 +0000 (19:14 +0200)]
testsuite: C++14 vs. C++17 struct-layout-1.exp testing with ALT_CXX_UNDER_TEST [PR94383]

> I haven't added (yet) checks if the alternate compiler does support these
> options (I think that can be done incrementally), so for now this testing is
> done only if the alternate compiler is not used.

This patch does that, so now when testing against not too old compiler
it can do the -std=c++14 vs. -std=c++17 testing also between under test and
alt compilers.

2020-04-24  Jakub Jelinek  <jakub@redhat.com>

PR c++/94383
* g++.dg/compat/struct-layout-1.exp: Use the -std=c++14 vs. -std=c++17
ABI compatibility testing even with ALT_CXX_UNDER_TEST, as long as
that compiler accepts -std=c++14 and -std=c++17 options.