Aditya Kumar [Sun, 13 Jun 2021 18:32:28 +0000 (11:32 -0700)]
Calculate getTerminator only when necessary
Differential Revision: https://reviews.llvm.org/D104202
Lang Hames [Mon, 14 Jun 2021 00:35:20 +0000 (10:35 +1000)]
[ORC-RT] Fix an error check.
Matthias Springer [Mon, 14 Jun 2021 01:40:50 +0000 (10:40 +0900)]
[mlir][linalg] Remove generic PadTensorOp vectorization pattern
The generic vectorization pattern handles only those cases, where
low and high padding is zero. This is already handled by a
canonicalization pattern.
Also add a new canonicalization test case to ensure that tensor cast ops
are properly inserted.
A more general vectorization pattern will be added in a subsequent commit.
Differential Revision: https://reviews.llvm.org/D103590
Chris Lattner [Mon, 14 Jun 2021 01:24:53 +0000 (18:24 -0700)]
[DominanceInfo] Make the ctor take a defaulted value for the operand. NFC.
This allows it to be default constructible, which makes sense given it
ignores the operand.
Matthias Springer [Mon, 14 Jun 2021 01:16:22 +0000 (10:16 +0900)]
[mlir] Vectorize linalg.pad_tensor consumed by transfer_write
Vectorize linalg.pad_tensor without generating a linalg.init_tensor when consumed by a transfer_write.
Differential Revision: https://reviews.llvm.org/D103137
Matthias Springer [Mon, 14 Jun 2021 00:58:26 +0000 (09:58 +0900)]
[mlir] Vectorize linalg.pad_tensor consumed by subtensor_insert
Vectorize linalg.pad_tensor without generating a linalg.init_tensor when consumed by a subtensor_insert.
Differential Revision: https://reviews.llvm.org/D103780
Matthias Springer [Mon, 14 Jun 2021 00:51:50 +0000 (09:51 +0900)]
[mlir] Vectorize linalg.pad_tensor consumed by transfer_read
Vectorize linalg.pad_tensor without generating a linalg.init_tensor when consumed by a transfer_read.
Differential Revision: https://reviews.llvm.org/D103735
Matthias Springer [Mon, 14 Jun 2021 00:43:02 +0000 (09:43 +0900)]
[mlir][linalg] Add constant padding helper to PadTensorOp
* Add a helper function that returns the constant padding value (if applicable).
* Remove existing getConstantYieldValueFromBlock function, which does almost the same.
* Adapted from D103243.
Differential Revision: https://reviews.llvm.org/D104004
Juneyoung Lee [Mon, 14 Jun 2021 00:21:01 +0000 (09:21 +0900)]
[Utils] Add missing freeze and poison keyword highlights
This patch adds missing keyword highlights for freeze and poison
Reviewed By: MaskRay, porglezomp
Differential Revision: https://reviews.llvm.org/D104017
Jez Ng [Sun, 13 Jun 2021 23:43:37 +0000 (19:43 -0400)]
[lld-macho][nfc] Add `final` to classes where possible
I wanted to see if we would get any perf wins out of this, but
it doesn't seem to be the case. But it still seems worth committing.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D104200
Jez Ng [Sun, 13 Jun 2021 23:43:36 +0000 (19:43 -0400)]
[lld-macho][nfc] Represent the image loader cache with a ConcatInputSection
We don't need to define any special behavior for this section,
so creating a subclass for it is redundant.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D104199
Jez Ng [Sun, 13 Jun 2021 23:43:34 +0000 (19:43 -0400)]
[lld-macho][nfc] Remove InputSection::outSecFileOff
`outSecFileOff` and the associated `getFileOffset()` accessors were
unnecessary.
For all the cases we care about, `outSecFileOff` is the same as
`outSecOff`. The only time they deviate is if there are zerofill
sections within a given segment. But since zerofill sections are always
at the end of a segment, the only sections where the two values deviate
are zerofill sections themselves. And we never actually query the
outSecFileOff of zerofill sections.
As for `getFileOffset()`, the only place it was being used was to
calculate the offset of the entry symbol. However, we can compute that
value by just taking the difference between the address of the entry
symbol and the address of the Mach-O header. In fact, this appears to be
what ld64 itself does. This difference is the same as the file offset as
long as there are no intervening zerofill sections, but since `__text`
is the first section in `__TEXT`, this never happens, so our previous
use of `getFileOffset()` was not wrong -- just inefficient.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D104177
Eric Astor [Sun, 13 Jun 2021 22:35:51 +0000 (18:35 -0400)]
[ms] [llvm-ml] When parsing MASM, "jmp short" instructions are case insensitive
Handle "short" in a case-insensitive fashion in MASM.
Required to correctly parse z_Windows_NT-586_asm.asm from the OpenMP runtime.
Reviewed By: thakis
Differential Revision: https://reviews.llvm.org/D104195
Eric Astor [Sun, 13 Jun 2021 22:27:06 +0000 (18:27 -0400)]
[ms] [llvm-ml] Fix capitalization of the ignored CPU directives
These directives are matched in lowercase, so make sure to use lowercase for their P suffix.
Differential Revision: https://reviews.llvm.org/D104206
Eric Astor [Sun, 13 Jun 2021 22:33:55 +0000 (18:33 -0400)]
Fix misspelled instruction in X86 assembly parser
Did not correctly handle "jecxz short <address>".
Discovered while working on LLVM-ML; shows up in z_Windows_NT-586_asm.asm from the OpenMP runtime
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D104194
Saleem Abdulrasool [Sun, 13 Jun 2021 21:28:43 +0000 (14:28 -0700)]
unwind: allow building with GCC
This was regressed in
adf1561d6ce8. Since gcc does not support
`__has_feature`, this adjusts the build to use the
`__SANITIZE_ADDRESS__` macro which GCC defines to identify if ASAN is
enabled (similar to `__has_feature`). This allows building libunwind
with gcc again.
Patch by Daniel Levin!
Reviewed By: compnerd
Differential Revision: https://reviews.llvm.org/D104176
David Green [Sun, 13 Jun 2021 21:30:42 +0000 (22:30 +0100)]
[DSE] Extra multiblock loop tests, NFC.
Some of these can be DSE'd, some of which cannot. Useful in D100464.
Hanhan Wang [Sun, 13 Jun 2021 20:45:33 +0000 (13:45 -0700)]
Introduce tensor.insert op to Tensor dialect.
Add `tensor.insert` op to make `tensor.extract`/`tensor.insert` work in pairs
for `scalar` domain. Like `subtensor`/`subtensor_insert` work in pairs in
`tensor` domain, and `vector.transfer_read`/`vector.transfer_write` work in
pairs in `vector` domain.
Reviewed By: silvas
Differential Revision: https://reviews.llvm.org/D104139
Fangrui Song [Sun, 13 Jun 2021 19:41:11 +0000 (12:41 -0700)]
[ELF] Add OVERWRITE_SECTIONS command
This implements https://sourceware.org/bugzilla/show_bug.cgi?id=26404
An `OVERWRITE_SECTIONS` command is a `SECTIONS` variant which contains several
output section descriptions. The output sections do not have specify an order.
Similar to `INSERT [BEFORE|AFTER]`, `LinkerScript::hasSectionsCommand` is not
set, so the built-in rules (see `docs/ELF/linker_script.rst`) still apply.
`OVERWRITE_SECTIONS` can be more convenient than `INSERT` because it does not
need an anchor section.
The initial syntax is intentionally narrow to facilitate backward compatible
extensions in the future. Symbol assignments cannot be used.
This feature is versatile. To list a few usage:
* Use `section : { KEEP(...) }` to retain input sections under GC
* Define encapsulation symbols (start/end) for an output section
* Use `section : ALIGN(...) : { ... }` to overalign an output section (similar to ld64 `-sectalign`)
When an output section is specified by both `OVERWRITE_SECTIONS` and
`INSERT`, `INSERT` is processed after overwrite sections. To make this work,
this patch changes `InsertCommand` to use name based matching instead of pointer
based matching. (This may cause a difference when `INSERT` moves one output
section more than once. Such duplicate commands should not be used in practice
(seems that in GNU ld the output sections may just disappear).)
A linker script can be used without -T/--script. The traditional `SECTIONS`
commands are concatenated, so a wrong rule can be more noticeable from the
section order. This feature if misused can be less noticeable, just like
`INSERT`.
Differential Revision: https://reviews.llvm.org/D103303
Khem Raj [Sun, 13 Jun 2021 19:32:07 +0000 (12:32 -0700)]
[fuzzer] Fix build on musl
cstddef is needed for size_t definition.
(Multiple headers can provide size_t but none of them exists.)
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D96213
Fred Grim [Sun, 13 Jun 2021 14:36:42 +0000 (16:36 +0200)]
[clang-format] Adds a formatter for aligning arrays of structs
This adds a new formatter to arrange array of struct initializers into
neat columns.
Differential Revision: https://reviews.llvm.org/D101868
LemonBoy [Sun, 13 Jun 2021 18:03:42 +0000 (20:03 +0200)]
[SPARC] Legalize truncation and extension between fp128 and half
Lower truncations and expansions between fp128 and half values into libcalls.
Expand truncating stores into two separate truncation and a store operations.
Reviewed By: jrtc27
Differential Revision: https://reviews.llvm.org/D104185
Saleem Abdulrasool [Sun, 13 Jun 2021 17:52:27 +0000 (10:52 -0700)]
DirectoryWatcher: also wait for the notifier thread
Ultimately the DirectoryWatcher is not ready until the notifier thread
is also active. Failure to wait for the notifier thread may result in
loss of events. While this is not catastrophic in practice, the tests
are sensitive to this as depending on the thread scheduler, the thread
may fail to being execution before the operations are completed by the
fixture. Running this in a tight loop shows no regressions locally as
previously, but this failure mode was been sighted once on a builder.
Nico Weber [Sun, 13 Jun 2021 17:30:05 +0000 (13:30 -0400)]
[lld/mac] clarify comment
This is a "we should do X in the future" fixme, not an "X might go wrong"
fixme.
Nikita Popov [Sun, 13 Jun 2021 16:16:51 +0000 (18:16 +0200)]
[LoopUnroll] Test multi-exit runtime unrolling with predictable exit (NFC)
The (prior to prologue insertion) predictable exit shouldn't get
folded here. Make sure it isn't...
Simon Pilgrim [Sun, 13 Jun 2021 16:32:57 +0000 (17:32 +0100)]
RawError.h - remove unused <string> include. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 16:08:15 +0000 (17:08 +0100)]
BoundsChecking.cpp - tidy implicit header dependencies. NFCI.
We don't use <vector> but we do use std::pair (<utility>)
Simon Pilgrim [Sun, 13 Jun 2021 16:00:15 +0000 (17:00 +0100)]
DIPrinter.h - tidy implicit header dependencies. NFCI.
We don't use <string> but we do use std::unique_ptr (<memory>) and llvm::Optional<>
Simon Pilgrim [Sun, 13 Jun 2021 15:49:40 +0000 (16:49 +0100)]
DetailedRecordsBackend.cpp - printSectionHeading - avoid std::string creation/copies.
Don't create std::string from constant c-strings or pass std::string by value - we can use StringRef instead.
Simon Pilgrim [Sun, 13 Jun 2021 15:27:17 +0000 (16:27 +0100)]
DetailedRecordsBackend.cpp - tidy implicit header dependencies. NFCI.
We don't use <algorithm>, <set> or <vector>, but we do use std::pair (<utility>).
Simon Pilgrim [Sun, 13 Jun 2021 14:16:09 +0000 (15:16 +0100)]
ProfiledCallGraph.h - remove unused <string> include. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 14:07:14 +0000 (15:07 +0100)]
RegUsageInfoPropagate.cpp - remove unused <string> and <map> includes. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 13:49:41 +0000 (14:49 +0100)]
MachOObjectFile.cpp - remove unused <string> include. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 13:28:45 +0000 (14:28 +0100)]
DWARFDebugFrame.cpp - remove unused <string> include. NFCI.
Nico Weber [Sun, 13 Jun 2021 14:18:51 +0000 (10:18 -0400)]
fix comment typos to cycle bots
Simon Pilgrim [Sun, 13 Jun 2021 12:54:57 +0000 (13:54 +0100)]
GVN.cpp - remove unused <vector> include. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 12:53:03 +0000 (13:53 +0100)]
LoopUnrollAndJamPass.cpp - remove unused <vector> include. NFCI.
David Green [Sun, 13 Jun 2021 12:55:34 +0000 (13:55 +0100)]
[ARM] Introduce t2WhileLoopStartTP
This adds t2WhileLoopStartTP, similar to the t2DoLoopStartTP added in
D90591. It keeps a reference to both the tripcount register and the
element count register, so that the ARMLowOverheadLoops pass in the
backend can pick the correct one without having to search for it from
the operand of a VCTP.
Differential Revision: https://reviews.llvm.org/D103236
Markus Böck [Sun, 13 Jun 2021 12:48:27 +0000 (14:48 +0200)]
[clang][NFC] Add IsAnyDestructorNoReturn field to CXXRecord instead of calculating it on demand
This patch addresses a performance issue I noticed when using clang-12 to compile projects of mine. Even though the files weren't too large (around 1k cpp), the compiler was taking more than a minute to compile the source file, much longer than either GCC or MSVC.
Using a profiler it turned out the issue was the isAnyDestructorNoReturn function in CXXRecordDecl. In particular it being recursive, recalculating the property for every invocation, for every field and base class. This showed up in tracebacks in the profiler.
This patch instead adds IsAnyDestructorNoReturn as a Field to the data inside of CXXRecord and updates when a new base class, destructor, or record field member is added.
After this patch the problematic file of mine went from a compile time of 81s, down to 12s.
The patch itself should not change any functionality, just improve performance.
Differential Revision: https://reviews.llvm.org/D104182
Sanjay Patel [Sun, 13 Jun 2021 12:21:23 +0000 (08:21 -0400)]
[InstCombine] fold ctlz/cttz of bool types
https://alive2.llvm.org/ce/z/tX4pUT
Simon Pilgrim [Sun, 13 Jun 2021 12:05:17 +0000 (13:05 +0100)]
SValExplainer.h - get APSInt values by const reference instead of value. NFCI.
Avoid unnecessary copies.
Simon Pilgrim [Sun, 13 Jun 2021 12:03:47 +0000 (13:03 +0100)]
ArgumentPromotion.cpp - remove unused <string> include. NFCI.
Simon Pilgrim [Sun, 13 Jun 2021 11:36:51 +0000 (12:36 +0100)]
VPlanSLP.cpp - tidy implicit header dependencies. NFCI.
We don't use std::string and std::vector, but we do use std::pair and std::max.
Lang Hames [Sun, 13 Jun 2021 10:45:20 +0000 (20:45 +1000)]
[ORC-RT] Remove unused header in unit test.
Lang Hames [Sun, 13 Jun 2021 10:43:49 +0000 (20:43 +1000)]
[JITLink][MachO] Add missing testcase.
This test was accidentally left out of
f9649d123db.
Lang Hames [Sun, 13 Jun 2021 09:31:36 +0000 (19:31 +1000)]
[ORC-RT] Fix a comment.
Matheus Izvekov [Fri, 19 Mar 2021 02:32:06 +0000 (03:32 +0100)]
[clang] Implement P2266 Simpler implicit move
This Implements [[http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2266r1.html|P2266 Simpler implicit move]].
Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Reviewed By: Quuxplusone
Differential Revision: https://reviews.llvm.org/D99005
Kristina Bessonova [Wed, 2 Jun 2021 17:51:11 +0000 (19:51 +0200)]
[ARM][NEON] Combine base address updates for vld1Ndup intrinsics
Reviewed By: dmgreen
Differential Revision: https://reviews.llvm.org/D103836
Luo, Yuanke [Thu, 10 Jun 2021 14:50:20 +0000 (22:50 +0800)]
[X86] Check immediate before get it.
For CMP imm instruction, when the operand 1 is symbol address we should
check if it is immediate first. Here is the example code.
`CMP64mi32 $noreg, 8, killed renamable $rcx, @d, $noreg, @a, implicit-def
$eflags`
Many thanks to Craig, Topper for the test case to reproduce this issue.
Differential Revision: https://reviews.llvm.org/D104037
Luo, Yuanke [Sun, 13 Jun 2021 05:55:19 +0000 (13:55 +0800)]
Revert "[X86] Check immediate before get it."
This reverts commit
9eb2f723c24523194b833779d20b027bf89a4f55.
Shoaib Meenai [Sun, 13 Jun 2021 02:47:09 +0000 (19:47 -0700)]
[runtimes] Fix umbrella component targets
When we're building the runtimes for multiple platform targets, we
create umbrella build targets for each distribution component, but those
targets didn't have any dependencies and were just no-ops. Make the
umbrella target depend on the sub-targets for each platform to fix this,
which is consistent with the behavior of the umbrella targets for each
runtime, and also consistent with the behavior when we've only specified
the default target.
David Blaikie [Sun, 13 Jun 2021 01:54:08 +0000 (18:54 -0700)]
llvm-objcopy: fix section size truncation/extension when dumping sections
Since this only comes up with inputs containing sections at least 4GB
large (I guess I could use a bzero section or something, so the input
file doesn't have to be 4GB, but even then the output file would have to
be 4GB, right?) I've skipped testing this. If there's a nice way to test
this without needing 4GB inputs or output files.
The subtlety here is demonstrated by this code:
struct t { operator uint64_t(); };
static_assert(std::is_same_v<int, decltype(std::declval<bool>() ? 0 : std::declval<t>())>);
static_assert(std::is_same_v<uint64_t, decltype(std::declval<bool>() ? 0 : std::declval<uint64_t>())>);
Because of this difference, the original source code was getting an int
type (truncating the actual size) and then extending it again, resulting
in bogus values (I haven't thought through this hard enough to explain
why the resulting value was 0xffff... - sign extension, possible UB, but
in any case it's the wrong answer - in this particular case I was
looking at that resulted in a size so large that we couldn't open a file
large enough to write to and ended up with a rather vague:
error: 'file_name.o': Invalid argument
Luo, Yuanke [Thu, 10 Jun 2021 14:50:20 +0000 (22:50 +0800)]
[X86] Check immediate before get it.
For CMP imm instruction, when the operand 1 is symbol address we should
check if it is immediate first. Here is the example code.
`CMP64mi32 $noreg, 8, killed renamable $rcx, @d, $noreg, @a, implicit-def
$eflags`
Many thanks to Craig, Topper for the test case to reproduce this issue.
Differential Revision: https://reviews.llvm.org/D104037
Lang Hames [Sat, 12 Jun 2021 22:55:47 +0000 (08:55 +1000)]
[ORC-RT] Split Simple-Packed-Serialization code into its own header.
This will simplify integration of this code into LLVM -- The
Simple-Packed-Serialization code can be copied near-verbatim, but
WrapperFunctionResult will require more adaptation.
Mehdi Amini [Sat, 12 Jun 2021 21:55:37 +0000 (21:55 +0000)]
Simplify getArgAttrDict/getResultAttrDict by removing unnecessary checks
There is a slight change in behavior: if the arg dictionnary is empty
then we return this empty dictionnary instead of a null attribute.
This is more consistent with accessing it through:
ArrayAttr args_attr = func_op.getAllArgAttrs();
args_attr[num].cast<DictionnaryAttr>() ...
Differential Revision: https://reviews.llvm.org/D104189
Roman Lebedev [Sat, 12 Jun 2021 21:00:28 +0000 (00:00 +0300)]
[NFC][X86][Codegen] Add shuffle test that would benefit from sorting in reduceBuildVecToShuffle()
Mehdi Amini [Sat, 12 Jun 2021 20:08:37 +0000 (20:08 +0000)]
Use dyn_cast_or_null instead of dyn_cast in FunctionLike::verifyTrait (NFC)
This is making the verifier more tolerant to cases where a "null"
Attribute would be inserted in the array of func arguments/results
attributes.
Ian McIntyre [Sat, 12 Jun 2021 19:23:07 +0000 (12:23 -0700)]
[llvm-objcopy] Exclude empty sections in IHexWriter output
IHexWriter was evaluating a section's physical address when deciding if
that section should be written to an output. This approach does not
account for a zero-sized section that has the same physical address as a
sized section. The behavior varies from GNU objcopy, and may result in a
HEX file that does not include all program sections.
The IHexWriter now excludes zero-sized sections when deciding what
should be written to the output. This affects the contents of the
writer's `Sections` collection; we will not try to insert multiple
sections that could have the same physical address. The behavior seems
consistent with GNU objcopy, which always excludes empty sections,
no matter the address.
The new test case evaluates the IHexWriter behavior when provided a
variety of empty sections that overlap or append a filled section. See
the input file's comments for more information. Given that test input,
and the change to the IHexWriter, GNU objcopy and llvm-objcopy produce
the same output.
Reviewed By: jhenderson, MaskRay, evgeny777
Differential Revision: https://reviews.llvm.org/D101332
Xun Li [Sat, 12 Jun 2021 17:29:53 +0000 (10:29 -0700)]
[CHR] Don't run ControlHeightReduction if any BB has address taken
This patch is to address https://bugs.llvm.org/show_bug.cgi?id=50610.
In computed goto pattern, there are usually a list of basic blocks that are all targets of indirectbr instruction, and each basic block also has address taken and stored in a variable.
CHR pass could potentially clone these basic blocks, which would generate a cloned version of the indirectbr and clonved version of all basic blocks in the list.
However these basic blocks will not have their addresses taken and stored anywhere. So latter SimplifyCFG pass will simply remove all tehse cloned basic blocks, resulting in incorrect code.
To fix this, when searching for scopes, we skip scopes that contains BBs with addresses taken.
Added a few test cases.
Reviewed By: aeubanks, wenlei, hoy
Differential Revision: https://reviews.llvm.org/D103867
Craig Topper [Sat, 12 Jun 2021 16:49:32 +0000 (09:49 -0700)]
[X86] Add ISD::FREEZE and ISD::AssertAlign to the list of opcodes that don't guarantee upper 32 bits are zero.
The freeze issue was reported here
https://llvm.discourse.group/t/bug-or-feature-freeze-instruction/3639
I don't have a test for AssertAlign. I just noticed it was missing
and assume it should be similar to the other two Asserts.
Reviewed By: RKSimon
Differential Revision: https://reviews.llvm.org/D104178
Saleem Abdulrasool [Sat, 12 Jun 2021 02:05:42 +0000 (19:05 -0700)]
Revert "Revert "DirectoryWatcher: add an implementation for Windows""
This reverts commit
0ec1cf13f2a4e31aa2c5ccc665c5fbdcd3a94577.
Restore the implementation with some minor tweaks:
- Use std::unique_ptr for the path instead of std::vector
* Stylistic improvement as the buffer is already heap allocated, this
just makes it clearer.
- Correct the notification buffer allocation size
* Memory usage fix: we were allocating 4x the computed size
- Correct the passing of the buffer size to RDC
* Memory usage fix: we were reporting 1/4th of the size
- Convert the operation event to auto-reset
* Bug Fix: we never reset the event
- Remove `FILE_NOTIFY_CHANGE_LAST_ACCESS` from RDC events
* Memory usage fix: we never needed this notification
- Fold events for the notification action
* Stylistic improvement to be clear how the events map
- Update comment
* Stylistic improvement to be clear what the RAII controls
- Fix the race condition that was uncovered previously
* We would return from the construction before the watcher thread
began execution. The test would then proceed to begin execution,
and we would miss the initial notifications. We now ensure that the
watcher thread is initialized before we return. This ensures that
we do not miss the initial notifications.
Running the test on a SSD was able to uncover the access pattern. This
now seems to pass reliably where it was previously flaky locally.
Matheus Izvekov [Fri, 19 Mar 2021 02:32:06 +0000 (03:32 +0100)]
[clang] NRVO: Improvements and handling of more cases.
This expands NRVO propagation for more cases:
Parse analysis improvement:
* Lambdas and Blocks with dependent return type can have their variables
marked as NRVO Candidates.
Variable instantiation improvements:
* Fixes crash when instantiating NRVO variables in Blocks.
* Functions, Lambdas, and Blocks which have auto return type have their
variables' NRVO status propagated. For Blocks with non-auto return type,
as a limitation, this propagation does not consider the actual return
type.
This also implements exclusion of VarDecls which are references to
dependent types.
Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Reviewed By: Quuxplusone
Differential Revision: https://reviews.llvm.org/D99696
Florian Hahn [Sat, 12 Jun 2021 11:11:51 +0000 (12:11 +0100)]
[VPlan] Add more sinking/merging tests with predicated loads/stores.
Shashij gupta [Sat, 12 Jun 2021 13:58:40 +0000 (19:28 +0530)]
[MLIR] Simplify affine.if ops with trivial conditions
The commit simplifies affine.if ops :
The affine if operation gets removed if the condition is universally true or false and then/else block is merged with the parent block.
Signed-off-by: Shashij Gupta shashij.gupta@polymagelabs.com
Reviewed By: bondhugula, pr4tgpt
Differential Revision: https://reviews.llvm.org/D104015
Florian Hahn [Sat, 12 Jun 2021 11:03:59 +0000 (12:03 +0100)]
Revert "Allow signposts to take advantage of deferred string substitution"
This reverts commit
4fc93a3a1f95ef5a0a57750fc621f2411ea445a8 because it
breaks LLDB builds on certain macOS platform & SDK combinations, e.g.
http://green.lab.llvm.org/green/job/lldb-cmake-standalone/3288/consoleFull#-
195476041949ba4694-19c4-4d7e-bec5-
911270d8a58c
Kristina Bessonova [Wed, 19 May 2021 12:12:27 +0000 (14:12 +0200)]
[lit] Attempt for fix tests failing because of 'warning: non-portable path to file'
This is an attempt to fix clang test failures due to 'nonportable-include-path'
warnings on Windows when a path to llvm-project's base directory contains some
uppercase letters (excluding a drive letter).
The issue originates from 2 problems:
* discovery.py loads site config in lower case causing all the paths
based on __file__ and requested within the config file to be in lowercase as well,
* neither os.path.abspath() nor os.path.realpath() (both used to obtain paths of
config files, sources, object directories, etc) do not return paths in the correct
case for Windows (at least consistently for all python versions).
As os.path library doesn't seem to provide any relaible way to restore
the case for paths on Windows, this patch proposes to use pathlib.resolve().
pathlib is a part of Python 3.4 while llvm lit requires Python 3.6.
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D103014
Florian Hahn [Sat, 12 Jun 2021 10:28:08 +0000 (11:28 +0100)]
Revert "[X86FixupLEAs] Transform the sequence LEA/SUB to SUB/SUB"
This reverts commit
1b748faf2bae246e2fc77d88420df13c2e60f4df because it
breaks building the llvm-test-suite with -verify-machineinstrs on X86:
http://green.lab.llvm.org/green/job/test-suite-verify-machineinstrs-x86_64-O3/9585/
Running llc -verify-machineinstr on X86 crashes on the IR below:
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
%struct.widget = type { i32, i32, i32, i32, i32*, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [16 x [16 x i16]], [6 x [32 x i32]], [16 x [16 x i32]], [4 x [12 x [4 x [4 x i32]]]], [16 x i32], i8**, i32*, i32***, i32**, i32, i32, i32, i32, %struct.baz*, %struct.wobble.1*, i32, i32, i32, i32, i32, i32, %struct.quux.2*, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [3 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32***, i32***, i32****, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [3 x [2 x i32]], [3 x [2 x i32]], i32, i32, i64, i64, %struct.zot.3, %struct.zot.3, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.baz = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, %struct.snork*, %struct.wombat.0*, %struct.wobble*, i32, i32*, i32*, i32*, i32, i32*, i32*, i32*, i32 (%struct.widget*, %struct.eggs*)*, i32, i32, i32, i32 }
%struct.snork = type { %struct.spam*, %struct.zot, i32 (%struct.wombat*, %struct.widget*, %struct.snork*)* }
%struct.spam = type { i32, i32, i32, i32, i8*, i32 }
%struct.zot = type { i32, i32, i32, i32, i32, i8*, i32* }
%struct.wombat = type { i32, i32, i32, i32, i32, i32, i32, i32, void (i32, i32, i32*, i32*)*, void (%struct.wombat*, %struct.widget*, %struct.zot*)* }
%struct.wombat.0 = type { [4 x [11 x %struct.quux]], [2 x [9 x %struct.quux]], [2 x [10 x %struct.quux]], [2 x [6 x %struct.quux]], [4 x %struct.quux], [4 x %struct.quux], [3 x %struct.quux] }
%struct.quux = type { i16, i8 }
%struct.wobble = type { [2 x %struct.quux], [4 x %struct.quux], [3 x [4 x %struct.quux]], [10 x [4 x %struct.quux]], [10 x [15 x %struct.quux]], [10 x [15 x %struct.quux]], [10 x [5 x %struct.quux]], [10 x [5 x %struct.quux]], [10 x [15 x %struct.quux]], [10 x [15 x %struct.quux]] }
%struct.eggs = type { [1000 x i8], [1000 x i8], [1000 x i8], i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.wobble.1 = type { i32, [2 x i32], i32, i32, %struct.wobble.1*, %struct.wobble.1*, i32, [2 x [4 x [4 x [2 x i32]]]], i32, i64, i64, i32, i32, [4 x i8], [4 x i8], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.quux.2 = type { i32, i32, i32, i32, i32, %struct.quux.2* }
%struct.zot.3 = type { i64, i16, i16, i16 }
define void @blam(%struct.widget* %arg, i32 %arg1) local_unnamed_addr {
bb:
%tmp = load i32, i32* undef, align 4
%tmp2 = sdiv i32 %tmp, 6
%tmp3 = sdiv i32 undef, 6
%tmp4 = load i32, i32* undef, align 4
%tmp5 = icmp eq i32 %tmp4, 4
%tmp6 = select i1 %tmp5, i32 %tmp3, i32 %tmp2
%tmp7 = getelementptr inbounds [4 x [4 x i32]], [4 x [4 x i32]]* undef, i64 0, i64 0, i64 0
%tmp8 = zext i16 undef to i32
%tmp9 = zext i16 undef to i32
%tmp10 = load i16, i16* undef, align 2
%tmp11 = zext i16 %tmp10 to i32
%tmp12 = zext i16 undef to i32
%tmp13 = zext i16 undef to i32
%tmp14 = zext i16 undef to i32
%tmp15 = load i16, i16* undef, align 2
%tmp16 = zext i16 %tmp15 to i32
%tmp17 = zext i16 undef to i32
%tmp18 = sub nsw i32 %tmp8, %tmp9
%tmp19 = shl nsw i32 undef, 1
%tmp20 = add nsw i32 %tmp19, %tmp18
%tmp21 = sub nsw i32 %tmp11, %tmp12
%tmp22 = shl nsw i32 undef, 1
%tmp23 = add nsw i32 %tmp22, %tmp21
%tmp24 = sub nsw i32 %tmp13, %tmp14
%tmp25 = shl nsw i32 undef, 1
%tmp26 = add nsw i32 %tmp25, %tmp24
%tmp27 = sub nsw i32 %tmp16, %tmp17
%tmp28 = shl nsw i32 undef, 1
%tmp29 = add nsw i32 %tmp28, %tmp27
%tmp30 = sub nsw i32 %tmp20, %tmp29
%tmp31 = sub nsw i32 %tmp23, %tmp26
%tmp32 = shl nsw i32 %tmp30, 1
%tmp33 = add nsw i32 %tmp32, %tmp31
store i32 %tmp33, i32* undef, align 4
%tmp34 = mul nsw i32 %tmp31, -2
%tmp35 = add nsw i32 %tmp34, %tmp30
store i32 %tmp35, i32* undef, align 4
%tmp36 = select i1 %tmp5, i32 undef, i32 undef
br label %bb37
bb37: ; preds = %bb
%tmp38 = load i32, i32* undef, align 4
%tmp39 = ashr i32 %tmp38, %tmp6
%tmp40 = load i32, i32* undef, align 4
%tmp41 = sdiv i32 %tmp39, %tmp40
store i32 %tmp41, i32* undef, align 4
ret void
}
Florian Hahn [Sat, 12 Jun 2021 10:27:33 +0000 (11:27 +0100)]
Revert "[X86FixupLEAs] Sub register usage of LEA dest should block LEA/SUB optimization"
This reverts commit
f35bcea1d4748889b8240defdf00cb7a71cbe070 because it
depends on
1b748faf2bae246e2fc77d88420df13c2e60f4df, which breaks
building the llvm-test-suite with -verify-machineinstrs on X86.
See
154adc0f135cff3f8a8861c335d2b88c8049d098 for more details.
madhur13490 [Thu, 3 Jun 2021 17:04:10 +0000 (22:34 +0530)]
[AMDGPU][IndirectCalls] Fix register usage propagation for indirect/external calls
This patch computes max SGPRs and VGPRs used by module
in presence of indirect calls and makes that
as register requirement for functions/kernels
which makes indirect calls.
This patch also refactors code AMDGPUSubTarget.cpp
which add a "base" variants of getMaxNumSGPRs which
is used by MachineFunction and new Function version.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D103636
spupyrev [Sat, 12 Jun 2021 04:45:47 +0000 (21:45 -0700)]
A post-processing for BFI inference
The current implementation for computing relative block frequencies does
not handle correctly control-flow graphs containing irreducible loops. This
results in suboptimally generated binaries, whose perf can be up to 5%
worse than optimal.
To resolve the problem, we apply a post-processing step, which iteratively
updates block frequencies based on the frequencies of their predesessors.
This corresponds to finding the stationary point of the Markov chain by
an iterative method aka "PageRank computation". The algorithm takes at
most O(|E| * IterativeBFIMaxIterations) steps but typically converges faster.
It is turned on by passing option `use-iterative-bfi-inference`
and applied only for functions containing profile data and irreducible loops.
Tested on SPEC06/17, where it is helping to get correct profile counts for one of
the binaries (403.gcc). In prod binaries, we've seen a speedup of up to 2%-5%
for binaries containing functions with hot irreducible loops.
Reviewed By: hoy, wenlei, davidxl
Differential Revision: https://reviews.llvm.org/D103289
Michael Kruse [Sat, 12 Jun 2021 04:25:33 +0000 (23:25 -0500)]
[Flang][test] Fix Windows buildbot.
Commit
1b241b9b400bdfc5b8e0d157f0f46436677927b8 /
patch https://reviews.llvm.org/D104130 introduced an new test which
calls a UNIX shell script. Add
REQUIRES: shell
to not run it on Windows.
Stephen Neuendorffer [Fri, 11 Jun 2021 23:58:07 +0000 (16:58 -0700)]
[mlir] make normalizeAffineFor public
Previously this was just a static method.
Adrian Prantl [Sat, 12 Jun 2021 00:58:05 +0000 (17:58 -0700)]
Improve materializer error messages to include type names.
rdar://
79201552
Alexander Shaposhnikov [Sat, 12 Jun 2021 00:47:28 +0000 (17:47 -0700)]
[lld][MachO] Fix function starts section
Sort the addresses stored in FunctionStarts section.
Previously we were encoding potentially large numbers (due to unsigned overflow).
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D103662
Jez Ng [Sat, 12 Jun 2021 00:18:00 +0000 (20:18 -0400)]
[lld-macho] Fix debug build
D103977 broke a bunch of stuff as I had only tested the release build
which eliminated asserts.
I've retained the asserts where possible, but I also removed a bunch
instead of adding a whole lot of verbose ConcatInputSection casts.
Uday Bondhugula [Sat, 5 Jun 2021 14:24:34 +0000 (19:54 +0530)]
[MLIR] Execution engine python binding support for shared libraries
Add support to Python bindings for the MLIR execution engine to load a
specified list of shared libraries - for eg. to use MLIR runtime
utility libraries.
Differential Revision: https://reviews.llvm.org/D104009
Kai Luo [Fri, 11 Jun 2021 23:21:40 +0000 (23:21 +0000)]
[AIX][compiler-rt] Fix cmake build of libatomic for cmake-3.16+
cmake-3.16+ for AIX changes the default behavior of building a `SHARED` library which breaks AIX's build of libatomic, i.e., cmake-3.16+ builds `SHARED` as an archive of dynamic libraries. To fix it, we have to build `libatomic.so.1` as `MODULE` which keeps `libatomic.so.1` as an normal dynamic library.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D103786
Adrian Prantl [Fri, 11 Jun 2021 22:18:25 +0000 (15:18 -0700)]
Allow signposts to take advantage of deferred string substitution
One nice feature of the os_signpost API is that format string
substitutions happen in the consumer, not the logging
application. LLVM's current Signpost class doesn't take advantage of
this though and instead always uses a static "Begin/End %s" format
string.
This patch uses variadic macros to allow the API to be used as
intended. Unfortunately, the primary use-case I had in mind (the
LLDB_SCOPED_TIMER() macro) does not get much better from this, because
__PRETTY_FUNCTION__ is *not* a macro, but a static string, so
signposts created by LLDB_SCOPED_TIMER() still use a static "%s"
format string. At least LLDB_SCOPED_TIMERF() works as intended.
This reapplies the previsously reverted patch with support for
platforms where signposts are unavailable.
Differential Revision: https://reviews.llvm.org/D103575
Jez Ng [Fri, 11 Jun 2021 23:49:54 +0000 (19:49 -0400)]
[lld-macho] Have dead-stripping work with literal sections
Literal sections are not atomically live or dead. Rather,
liveness is tracked for each individual literal they contain. CStrings
have their liveness tracked via a `live` bit in StringPiece, and
fixed-width literals have theirs tracked via a BitVector.
The live-marking code now needs to track the offset within each section
that is to be marked live, in order to identify the literal at that
particular offset.
Numbers for linking chromium_framework on my 3.2 GHz 16-Core Intel Xeon W
with both `-dead_strip` and `--deduplicate-literals`, with and without this diff
applied:
```
N Min Max Median Avg Stddev
x 20 4.32 4.44 4.375 4.372 0.
03105174
+ 20 4.3 4.39 4.36 4.3595 0.
023277502
No difference proven at 95.0% confidence
```
This gives us size savings of about 0.4%.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D103979
Jez Ng [Fri, 11 Jun 2021 23:49:53 +0000 (19:49 -0400)]
[lld-macho][nfc] Have InputSection ctors take some parameters
This is motivated by an upcoming diff in which the
WordLiteralInputSection ctor sets itself up based on the value of its
section flags. As such, it needs to be passed the `flags` value as part
of its ctor parameters, instead of having them assigned after the fact
in `parseSection()`. While refactoring code to make that possible, I
figured it would make sense for the other InputSections to also take
their initial values as ctor parameters.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D103978
Jez Ng [Fri, 11 Jun 2021 23:49:52 +0000 (19:49 -0400)]
[lld-macho][nfc] Move liveness-tracking fields into ConcatInputSection
These fields currently live in the parent InputSection class,
but they should be specific to ConcatInputSection, since the other
InputSection classes (that contain literals) aren't atomically live or
dead -- rather their component string/int literals should have
individual liveness states. (An upcoming diff will add liveness bits for
StringPieces and fixed-sized literals.)
I also factored out some asserts for isCoalescedWeak() in MarkLive.cpp.
We now avoid putting coalesced sections in the `inputSections` vector,
so we don't have to check/assert against it everywhere.
Reviewed By: #lld-macho, thakis
Differential Revision: https://reviews.llvm.org/D103977
Jez Ng [Fri, 11 Jun 2021 23:49:50 +0000 (19:49 -0400)]
[lld-macho] Deduplicate fixed-width literals
Conceptually, the implementation is pretty straightforward: we put each
literal value into a hashtable, and then write out the keys of that
hashtable at the end.
In contrast with ELF, the Mach-O format does not support variable-length
literals that aren't strings. Its literals are either 4, 8, or 16 bytes
in length. LLD-ELF dedups its literals via sorting + uniq'ing, but since
we don't need to worry about overly-long values, we should be able to do
a faster job by just hashing.
That said, the implementation right now is far from optimal, because we
add to those hashtables serially. To parallelize this, we'll need a
basic concurrent hashtable (only needs to support concurrent writes w/o
interleave reads), which shouldn't be to hard to implement, but I'd like
to punt on it for now.
Numbers for linking chromium_framework on my 3.2 GHz 16-Core Intel Xeon W:
N Min Max Median Avg Stddev
x 20 4.27 4.39 4.315 4.3225 0.
033225703
+ 20 4.36 4.82 4.44 4.4845 0.
13152846
Difference at 95.0% confidence
0.162 +/- 0.0613971
3.74783% +/- 1.42041%
(Student's t, pooled s = 0.0959262)
This corresponds to binary size savings of 2MB out of 335MB, or 0.6%.
It's not a great tradeoff as-is, but as mentioned our implementation can
be signficantly optimized, and literal dedup will unlock more
opportunities for ICF to identify identical structures that reference
the same literals.
Reviewed By: #lld-macho, gkm
Differential Revision: https://reviews.llvm.org/D103113
Adrian Prantl [Fri, 11 Jun 2021 23:46:10 +0000 (16:46 -0700)]
Revert "Allow signposts to take advantage of deferred string substitution"
I forgot to make the LLDB macro conditional on Linux.
This reverts commit
541ccd1c1bb23e1e20a382844b35312c0caffd79.
Andrew Litteken [Fri, 11 Jun 2021 23:15:29 +0000 (18:15 -0500)]
[IRSim] Strip out the findSimilarity call from the constructor
Both doInitialize and runOnModule were running the entire analysis
due to the actual work being done in the constructor. Strip it out here
and only get the similarity during runOnModule.
Author: lanza
Reviewers: AndrewLitteken, paquette, plofti
Differential Revision: https://reviews.llvm.org/D92524
Adrian Prantl [Fri, 11 Jun 2021 22:51:35 +0000 (15:51 -0700)]
Disambiguate usage of struct mach_header and other MachO definitions.
Unfortunately the Darwin signpost header also pulls in the system
MachO header and so we need to make sure to use the LLVM versions of
those definitions.
Adrian Prantl [Fri, 11 Jun 2021 22:18:25 +0000 (15:18 -0700)]
Allow signposts to take advantage of deferred string substitution
One nice feature of the os_signpost API is that format string
substitutions happen in the consumer, not the logging
application. LLVM's current Signpost class doesn't take advantage of
this though and instead always uses a static "Begin/End %s" format
string.
This patch uses variadic macros to allow the API to be used as
intended. Unfortunately, the primary use-case I had in mind (the
LLDB_SCOPED_TIMER() macro) does not get much better from this, because
__PRETTY_FUNCTION__ is *not* a macro, but a static string, so
signposts created by LLDB_SCOPED_TIMER() still use a static "%s"
format string. At least LLDB_SCOPED_TIMERF() works as intended.
Differential Revision: https://reviews.llvm.org/D103575
Alexander Shaposhnikov [Fri, 11 Jun 2021 23:34:59 +0000 (16:34 -0700)]
[llvm-objcopy][MachO] Do not strip symbols with the flag REFERENCED_DYNAMICALLY set
Do not strip symbols having the flag REFERENCED_DYNAMICALLY set.
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D104092
Reid Kleckner [Fri, 11 Jun 2021 23:12:07 +0000 (16:12 -0700)]
[ASan/Win] Hide index from compiler to avoid new clang warning
Arthur Eubanks [Fri, 11 Jun 2021 22:59:20 +0000 (15:59 -0700)]
[NFC][OpaquePtr] Make getMemoryParamAllocType() compatible with opaque pointers
These ABI attributes now always require the type parameter.
sret was missing from the first set of checks but was covered by the
second set.
Sanjay Patel [Fri, 11 Jun 2021 17:57:56 +0000 (13:57 -0400)]
[InstCombine] add tests for bit manipulation intrinsics with bool values; NFC
Sanjay Patel [Fri, 11 Jun 2021 17:43:34 +0000 (13:43 -0400)]
[InstCombine] update test checks; NFC
Kevin Athey [Fri, 11 Jun 2021 20:39:35 +0000 (13:39 -0700)]
[sanitizer] Remove numeric values from -asan-use-after-return flag. (NFC)
for issue: https://github.com/google/sanitizers/issues/1394
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D104152
Kevin Athey [Fri, 11 Jun 2021 19:46:15 +0000 (12:46 -0700)]
[sanitizer] Replace -mllvm -asan-use-after-return in compile-rt tests with -fsanitize-address-use-after-return (NFC)
for issue: https://github.com/google/sanitizers/issues/1394
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D104146
Andrew Litteken [Fri, 11 Jun 2021 20:41:36 +0000 (15:41 -0500)]
[IRSim] Don't copy the Mapper for createCandidatesFromSuffixTree
Every invocation this was copying the Mapper for no reason. Take a const
ref instead.
Author: lanza
Reviewers: AndrewLitteken, plofti, paquette,
Differential Review: https://reviews.llvm.org/D92532
Raphael Isemann [Fri, 11 Jun 2021 20:43:38 +0000 (22:43 +0200)]
[lldb] Remove GCC XFAIL for TestCPPAuto and TestClassTemplateParameterPack
Both tests are passing for GCC>8 on Linux so let's mark them as passing.
TestCPPAuto was originally disabled due to "an problem with debug info generation"
in
ea35dbeff29f3095df3ad1d77cce3d9e5b197e7c .
TestClassTemplateParameterPack was disabled without explanation in
0f01fb39e3fe3d8e99df1dd185e75ad584b777b3 .
Roman Lebedev [Fri, 11 Jun 2021 20:26:17 +0000 (23:26 +0300)]
[NFC][X86][Codegen] Megacommit: mass-regenerate all check lines that were already autogenerated
The motivation is that the update script has at least two deviations
(`<...>@GOT`/`<...>@PLT`/ and not hiding pointer arithmetics) from
what pretty much all the checklines were generated with,
and most of the tests are still not updated, so each time one of the
non-up-to-date tests is updated to see the effect of the code change,
there is a lot of noise. Instead of having to deal with that each
time, let's just deal with everything at once.
This has been done via:
```
cd llvm-project/llvm/test/CodeGen/X86
grep -rl "; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py" | xargs -L1 <...>/llvm-project/llvm/utils/update_llc_test_checks.py --llc-binary <...>/llvm-project/build/bin/llc
```
Not all tests were regenerated, however.
Daniil Fukalov [Tue, 8 Jun 2021 16:53:28 +0000 (19:53 +0300)]
[NFC][CostModel] Fixed comment that comparisons work regardless of the state.
Reviewed By: sdesmalen
Differential Revision: https://reviews.llvm.org/D104068
Andrew Litteken [Fri, 11 Jun 2021 20:44:08 +0000 (15:44 -0500)]
Revert "[IRSim] Adding basic implementation of llvm-sim."
This reverts commit
f47d00c54b52bd8adf9b8725912ea1cd0f1873d5.
Philip Reames [Fri, 11 Jun 2021 20:30:10 +0000 (13:30 -0700)]
Allow ptrtoint/inttoptr of non-integral pointer types in IR
I don't like landing this change, but it's an acknowledgement of a practical reality. Despite not having well specified semantics for inttoptr and ptrtoint involving non-integral pointer types, they are used in practice. Here's a quick summary of the current pragmatic reality:
* I happen to know that the main external user of non-integral pointers has effectively disabled the verifier rules.
* RS4GC (the lowering pass for abstract GC machine model which is the key motivation for non-integral pointers), even supports them. We just have all the tests using an integral pointer space to let the verifier run.
* Certain idioms (such as alignment checks for alignment N, where any relocation is guaranteed to be N byte aligned) are fine in practice.
* As implemented, inttoptr/ptrtoint are CSEd and are not control dependent. This means that any code which is intending to check a particular bit pattern at site of use must be wrapped in an intrinsic or external function call.
This change allows them in the Verifier, and updates the LangRef to specific them as implementation dependent. This allows us to acknowledge current reality while still leaving ourselves room to punt on figuring out "good" semantics until the future.
Alex Lorenz [Fri, 11 Jun 2021 20:23:44 +0000 (13:23 -0700)]
[clang][ObjC] allow the use of NSAttributedString * argument type with format attribute
This is useful for APIs that want to accept an attributed NSString as their format string
rdar://
79163229