Csaba Dabis [Sat, 16 Mar 2019 09:16:16 +0000 (09:16 +0000)]
[analyzer] ConditionBRVisitor: Remove GDM checking
Summary: Removed the `GDM` checking what could prevent reports made by this visitor. Now we rely on constraint changes instead.
Reviewers: NoQ, george.karpenkov
Reviewed By: NoQ
Subscribers: jdoerfert, gerazo, xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp
Tags: #clang
Differential Revision: https://reviews.llvm.org/D54811
llvm-svn: 356318
Heejin Ahn [Sat, 16 Mar 2019 05:39:12 +0000 (05:39 +0000)]
[WebAssembly] Use rethrow intrinsic in the rethrow block
Summary:
Because in wasm we merge all catch clauses into one big catchpad, in
case none of the types in catch handlers matches after we test against
each of them, we should unwind to the next EH enclosing scope. For this,
we should NOT use a call to `__cxa_rethrow` but rather a call to our own
rethrow intrinsic, because what we're trying to do here is just to
transfer the control flow into the next enclosing EH pad (or the
caller). Calls to `__cxa_rethrow` should only be used after a call to
`__cxa_begin_catch`.
Reviewers: dschuff
Subscribers: sbc100, jgravelle-google, sunfish, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59353
llvm-svn: 356317
Heejin Ahn [Sat, 16 Mar 2019 05:38:57 +0000 (05:38 +0000)]
[WebAssembly] Make rethrow take an except_ref type argument
Summary:
In the new wasm EH proposal, `rethrow` takes an `except_ref` argument.
This change was missing in r352598.
This patch adds `llvm.wasm.rethrow.in.catch` intrinsic. This is an
intrinsic that's gonna eventually be lowered to wasm `rethrow`
instruction, but this intrinsic can appear only within a catchpad or a
cleanuppad scope. Also this intrinsic needs to be invokable - otherwise
EH pad successor for it will not be correctly generated in clang.
This also adds lowering logic for this intrinsic in
`SelectionDAGBuilder::visitInvoke`. This routine is basically a
specialized and simplified version of
`SelectionDAGBuilder::visitTargetIntrinsic`, but we can't use it
because if is only for `CallInst`s.
This deletes the previous `llvm.wasm.rethrow` intrinsic and related
tests, which was meant to be used within a `__cxa_rethrow` library
function. Turned out this needs some more logic, so the intrinsic for
this purpose will be added later.
LateEHPrepare takes a result value of `catch` and inserts it into
matching `rethrow` as an argument.
`RETHROW_IN_CATCH` is a pseudo instruction that serves as a link between
`llvm.wasm.rethrow.in.catch` and the real wasm `rethrow` instruction. To
generate a `rethrow` instruction, we need an `except_ref` argument,
which is generated from `catch` instruction. But `catch` instrutions are
added in LateEHPrepare pass, so we use `RETHROW_IN_CATCH`, which takes
no argument, until we are able to correctly lower it to `rethrow` in
LateEHPrepare.
Reviewers: dschuff
Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59352
llvm-svn: 356316
Heejin Ahn [Sat, 16 Mar 2019 04:46:05 +0000 (04:46 +0000)]
[WebAssembly] Method order change in LateEHPrepare (NFC)
Summary:
Currently the order of these methods does not matter, but the following
CL needs to have this order changed. Merging the order change and the
semantics change within a CL complicates the diff, so submitting the
order change first.
Reviewers: dschuff
Subscribers: sbc100, jgravelle-google, sunfish, jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59342
llvm-svn: 356315
Peter Collingbourne [Sat, 16 Mar 2019 03:46:02 +0000 (03:46 +0000)]
gn build: Merge r356305.
llvm-svn: 356314
Heejin Ahn [Sat, 16 Mar 2019 03:00:19 +0000 (03:00 +0000)]
[WebAssembly] Irreducible control flow rewrite
Summary:
Rewrite WebAssemblyFixIrreducibleControlFlow to a simpler and cleaner
design, which directly computes reachability and other properties
itself. This avoids previous complexity and bugs. (The new graph
analyses are very similar to how the Relooper algorithm would find loop
entries and so forth.)
This fixes a few bugs, including where we had a false positive and
thought fannkuch was irreducible when it was not, which made us much
larger and slower there, and a reverse bug where we missed
irreducibility. On fannkuch, we used to be 44% slower than asm2wasm and
are now 4% faster.
Reviewers: aheejin
Subscribers: jdoerfert, mgrang, dschuff, sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D58919
Patch by Alon Zakai (kripken)
llvm-svn: 356313
Fangrui Song [Sat, 16 Mar 2019 02:41:45 +0000 (02:41 +0000)]
[ADT] Make SmallVector emplace_back return a reference
This follows the C++17 std::vector change and can simplify immediate
back() calls.
llvm-svn: 356312
Julian Lettner [Sat, 16 Mar 2019 02:07:50 +0000 (02:07 +0000)]
[TSan][libdispatch] Configure libdispatch lit tests
llvm-svn: 356311
Sam Clegg [Sat, 16 Mar 2019 01:18:12 +0000 (01:18 +0000)]
[WebAssembly] Error on R_WASM_MEMORY_ADDR relocations against undefined data symbols.
For these types of relocations an absolute memory address is
required which is not possible for undefined data symbols. For symbols
that can be undefined at link time (i.e. external data symbols in
shared libraries) a different type of relocation (i.e. via a GOT) will
be needed.
Differential Revision: https://reviews.llvm.org/D59337
llvm-svn: 356310
Amara Emerson [Sat, 16 Mar 2019 01:02:10 +0000 (01:02 +0000)]
[GlobalISel] Make isel verification checks of vregs run under NDEBUG only.
llvm-svn: 356309
Devin Coughlin [Sat, 16 Mar 2019 01:01:29 +0000 (01:01 +0000)]
[analyzer] Teach scan-build to find clang when installed in /usr/local/bin/
Change scan-build to support the scenario where scan-build is installed in
$TOOLCHAIN/usr/local/bin/ but clang itself is installed in $TOOLCHAIN/usr/bin/.
This is restricted to when 'xcrun' is present; that is, on the Mac.
rdar://problem/
48914634
Differential Revision: https://reviews.llvm.org/D59406
llvm-svn: 356308
Csaba Dabis [Fri, 15 Mar 2019 23:44:35 +0000 (23:44 +0000)]
hello, clang
Test commit with head and body.
llvm-svn: 356307
Peter Collingbourne [Fri, 15 Mar 2019 22:47:34 +0000 (22:47 +0000)]
gn build: Add missing dependency to check-clang target.
llvm-svn: 356306
Fedor Sergeev [Fri, 15 Mar 2019 22:15:23 +0000 (22:15 +0000)]
[TimePasses] allow -time-passes reporting into a custom stream
TimePassesHandler object (implementation of time-passes for new pass manager)
gains ability to report into a stream customizable per-instance (per pipeline).
Intended use is to specify separate time-passes output stream per each compilation,
setting up TimePasses member of StandardInstrumentation during PassBuilder setup.
That allows to get independent non-overlapping pass-times reports for parallel
independent compilations (in JIT-like setups).
By default it still puts timing reports into the info-output-file stream
(created by CreateInfoOutputFile every time report is requested).
Unit-test added for non-default case, and it also allowed to discover that print() does not work
as declared - it did not reset the timers, leading to yet another report being printed into the default stream.
Fixed print() to actually reset timers according to what was declared in print's comments before.
Reviewed By: philip.pfaffe
Differential Revision: https://reviews.llvm.org/D59366
llvm-svn: 356305
Amara Emerson [Fri, 15 Mar 2019 21:59:50 +0000 (21:59 +0000)]
[GlobalISel] Allow MachineIRBuilder to build subregister copies.
This relaxes some asserts about sizes, and adds an optional subreg parameter
to buildCopy().
Also update AArch64 instruction selector to use this in places where we
previously used MachineInstrBuilder manually.
Differential Revision: https://reviews.llvm.org/D59434
llvm-svn: 356304
Eli Friedman [Fri, 15 Mar 2019 21:44:49 +0000 (21:44 +0000)]
[ARM] Add MachineVerifier logic for some Thumb1 instructions.
tMOVr and tPUSH/tPOP/tPOP_RET have register constraints which can't be
expressed in TableGen, so check them explicitly. I've unfortunately run
into issues with both of these recently; hopefully this saves some time
for someone else in the future.
Differential Revision: https://reviews.llvm.org/D59383
llvm-svn: 356303
Jonathan Peyton [Fri, 15 Mar 2019 21:24:45 +0000 (21:24 +0000)]
[OpenMP] Fix OMPT cancellation test for GOMP
The GOMP sections interface uses schedule(dynamic) dispatch so it cannot
be assumed which thread executes the cancel and which thread executes
the cancellation point. This patch allows either thread to execute either
section.
llvm-svn: 356302
Roman Lebedev [Fri, 15 Mar 2019 21:18:05 +0000 (21:18 +0000)]
[X86] X86ISelLowering::combineSextInRegCmov(): also handle i8 CMOV's
Summary:
As noted by @andreadb in https://reviews.llvm.org/D59035#inline-525780
If we have `sext (trunc (cmov C0, C1) to i8)`,
we can instead do `cmov (sext (trunc C0 to i8)), (sext (trunc C1 to i8))`
Reviewers: craig.topper, andreadb, RKSimon
Reviewed By: craig.topper
Subscribers: llvm-commits, andreadb
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59412
llvm-svn: 356301
Roman Lebedev [Fri, 15 Mar 2019 21:17:53 +0000 (21:17 +0000)]
[X86] Promote i8 CMOV's (PR40965)
Summary:
@mclow.lists brought up this issue up in IRC, it came up during
implementation of libc++ `std::midpoint()` implementation (D59099)
https://godbolt.org/z/oLrHBP
Currently LLVM X86 backend only promotes i8 CMOV if it came from 2x`trunc`.
This differential proposes to always promote i8 CMOV.
There are several concerns here:
* Is this actually more performant, or is it just the ASM that looks cuter?
* Does this result in partial register stalls?
* What about branch predictor?
# Indeed, performance should be the main point here.
Let's look at a simple microbenchmark: {
F8412076}
```
#include "benchmark/benchmark.h"
#include <algorithm>
#include <cmath>
#include <cstdint>
#include <iterator>
#include <limits>
#include <random>
#include <type_traits>
#include <utility>
#include <vector>
// Future preliminary libc++ code, from Marshall Clow.
namespace std {
template <class _Tp>
__inline _Tp midpoint(_Tp __a, _Tp __b) noexcept {
using _Up = typename std::make_unsigned<typename remove_cv<_Tp>::type>::type;
int __sign = 1;
_Up __m = __a;
_Up __M = __b;
if (__a > __b) {
__sign = -1;
__m = __b;
__M = __a;
}
return __a + __sign * _Tp(_Up(__M - __m) >> 1);
}
} // namespace std
template <typename T>
std::vector<T> getVectorOfRandomNumbers(size_t count) {
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<T> dis(std::numeric_limits<T>::min(),
std::numeric_limits<T>::max());
std::vector<T> v;
v.reserve(count);
std::generate_n(std::back_inserter(v), count,
[&dis, &gen]() { return dis(gen); });
assert(v.size() == count);
return v;
}
struct RandRand {
template <typename T>
static std::pair<std::vector<T>, std::vector<T>> Gen(size_t count) {
return std::make_pair(getVectorOfRandomNumbers<T>(count),
getVectorOfRandomNumbers<T>(count));
}
};
struct ZeroRand {
template <typename T>
static std::pair<std::vector<T>, std::vector<T>> Gen(size_t count) {
return std::make_pair(std::vector<T>(count, T(0)),
getVectorOfRandomNumbers<T>(count));
}
};
template <class T, class Gen>
void BM_StdMidpoint(benchmark::State& state) {
const size_t Length = state.range(0);
const std::pair<std::vector<T>, std::vector<T>> Data =
Gen::template Gen<T>(Length);
const std::vector<T>& a = Data.first;
const std::vector<T>& b = Data.second;
assert(a.size() == Length && b.size() == a.size());
benchmark::ClobberMemory();
benchmark::DoNotOptimize(a);
benchmark::DoNotOptimize(a.data());
benchmark::DoNotOptimize(b);
benchmark::DoNotOptimize(b.data());
for (auto _ : state) {
for (size_t i = 0; i < Length; i++) {
const auto calculated = std::midpoint(a[i], b[i]);
benchmark::DoNotOptimize(calculated);
}
}
state.SetComplexityN(Length);
state.counters["midpoints"] =
benchmark::Counter(Length, benchmark::Counter::kIsIterationInvariant);
state.counters["midpoints/sec"] =
benchmark::Counter(Length, benchmark::Counter::kIsIterationInvariantRate);
const size_t BytesRead = 2 * sizeof(T) * Length;
state.counters["bytes_read/iteration"] =
benchmark::Counter(BytesRead, benchmark::Counter::kDefaults,
benchmark::Counter::OneK::kIs1024);
state.counters["bytes_read/sec"] = benchmark::Counter(
BytesRead, benchmark::Counter::kIsIterationInvariantRate,
benchmark::Counter::OneK::kIs1024);
}
template <typename T>
static void CustomArguments(benchmark::internal::Benchmark* b) {
const size_t L2SizeBytes = 2 * 1024 * 1024;
// What is the largest range we can check to always fit within given L2 cache?
const size_t MaxLen = L2SizeBytes / /*total bufs*/ 2 /
/*maximal elt size*/ sizeof(T) / /*safety margin*/ 2;
b->RangeMultiplier(2)->Range(1, MaxLen)->Complexity(benchmark::oN);
}
// Both of the values are random.
// The comparison is unpredictable.
BENCHMARK_TEMPLATE(BM_StdMidpoint, int32_t, RandRand)
->Apply(CustomArguments<int32_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint32_t, RandRand)
->Apply(CustomArguments<uint32_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, int64_t, RandRand)
->Apply(CustomArguments<int64_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint64_t, RandRand)
->Apply(CustomArguments<uint64_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, int16_t, RandRand)
->Apply(CustomArguments<int16_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint16_t, RandRand)
->Apply(CustomArguments<uint16_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, int8_t, RandRand)
->Apply(CustomArguments<int8_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint8_t, RandRand)
->Apply(CustomArguments<uint8_t>);
// One value is always zero, and another is bigger or equal than zero.
// The comparison is predictable.
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint32_t, ZeroRand)
->Apply(CustomArguments<uint32_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint64_t, ZeroRand)
->Apply(CustomArguments<uint64_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint16_t, ZeroRand)
->Apply(CustomArguments<uint16_t>);
BENCHMARK_TEMPLATE(BM_StdMidpoint, uint8_t, ZeroRand)
->Apply(CustomArguments<uint8_t>);
```
```
$ ~/src/googlebenchmark/tools/compare.py --no-utest benchmarks ./llvm-cmov-bench-OLD ./llvm-cmov-bench-NEW
RUNNING: ./llvm-cmov-bench-OLD --benchmark_out=/tmp/tmp5a5qjm
2019-03-06 21:53:31
Running ./llvm-cmov-bench-OLD
Run on (8 X 4000 MHz CPU s)
CPU Caches:
L1 Data 16K (x8)
L1 Instruction 64K (x4)
L2 Unified 2048K (x4)
L3 Unified 8192K (x1)
Load Average: 1.78, 1.81, 1.36
----------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations UserCounters<...>
----------------------------------------------------------------------------------------------------
<...>
BM_StdMidpoint<int32_t, RandRand>/131072 300398 ns 300404 ns 2330 bytes_read/iteration=1024k bytes_read/sec=3.25083G/s midpoints=305.398M midpoints/sec=436.319M/s
BM_StdMidpoint<int32_t, RandRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<int32_t, RandRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<uint32_t, RandRand>/131072 300433 ns 300433 ns 2330 bytes_read/iteration=1024k bytes_read/sec=3.25052G/s midpoints=305.398M midpoints/sec=436.278M/s
BM_StdMidpoint<uint32_t, RandRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<uint32_t, RandRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<int64_t, RandRand>/65536 169857 ns 169858 ns 4121 bytes_read/iteration=1024k bytes_read/sec=5.74929G/s midpoints=270.074M midpoints/sec=385.828M/s
BM_StdMidpoint<int64_t, RandRand>_BigO 2.59 N 2.59 N
BM_StdMidpoint<int64_t, RandRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<uint64_t, RandRand>/65536 169770 ns 169771 ns 4125 bytes_read/iteration=1024k bytes_read/sec=5.75223G/s midpoints=270.336M midpoints/sec=386.026M/s
BM_StdMidpoint<uint64_t, RandRand>_BigO 2.59 N 2.59 N
BM_StdMidpoint<uint64_t, RandRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<int16_t, RandRand>/262144 591169 ns 591179 ns 1182 bytes_read/iteration=1024k bytes_read/sec=1.65189G/s midpoints=309.854M midpoints/sec=443.426M/s
BM_StdMidpoint<int16_t, RandRand>_BigO 2.25 N 2.25 N
BM_StdMidpoint<int16_t, RandRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<uint16_t, RandRand>/262144 591264 ns 591274 ns 1184 bytes_read/iteration=1024k bytes_read/sec=1.65162G/s midpoints=310.378M midpoints/sec=443.354M/s
BM_StdMidpoint<uint16_t, RandRand>_BigO 2.25 N 2.25 N
BM_StdMidpoint<uint16_t, RandRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<int8_t, RandRand>/524288 2983669 ns 2983689 ns 235 bytes_read/iteration=1024k bytes_read/sec=335.156M/s midpoints=123.208M midpoints/sec=175.718M/s
BM_StdMidpoint<int8_t, RandRand>_BigO 5.69 N 5.69 N
BM_StdMidpoint<int8_t, RandRand>_RMS 0 % 0 %
<...>
BM_StdMidpoint<uint8_t, RandRand>/524288 2668398 ns 2668419 ns 262 bytes_read/iteration=1024k bytes_read/sec=374.754M/s midpoints=137.363M midpoints/sec=196.479M/s
BM_StdMidpoint<uint8_t, RandRand>_BigO 5.09 N 5.09 N
BM_StdMidpoint<uint8_t, RandRand>_RMS 0 % 0 %
<...>
BM_StdMidpoint<uint32_t, ZeroRand>/131072 300887 ns 300887 ns 2331 bytes_read/iteration=1024k bytes_read/sec=3.24561G/s midpoints=305.529M midpoints/sec=435.619M/s
BM_StdMidpoint<uint32_t, ZeroRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<uint32_t, ZeroRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<uint64_t, ZeroRand>/65536 169634 ns 169634 ns 4102 bytes_read/iteration=1024k bytes_read/sec=5.75688G/s midpoints=268.829M midpoints/sec=386.338M/s
BM_StdMidpoint<uint64_t, ZeroRand>_BigO 2.59 N 2.59 N
BM_StdMidpoint<uint64_t, ZeroRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<uint16_t, ZeroRand>/262144 592252 ns 592255 ns 1182 bytes_read/iteration=1024k bytes_read/sec=1.64889G/s midpoints=309.854M midpoints/sec=442.62M/s
BM_StdMidpoint<uint16_t, ZeroRand>_BigO 2.26 N 2.26 N
BM_StdMidpoint<uint16_t, ZeroRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<uint8_t, ZeroRand>/524288 987295 ns 987309 ns 711 bytes_read/iteration=1024k bytes_read/sec=1012.85M/s midpoints=372.769M midpoints/sec=531.028M/s
BM_StdMidpoint<uint8_t, ZeroRand>_BigO 1.88 N 1.88 N
BM_StdMidpoint<uint8_t, ZeroRand>_RMS 1 % 1 %
RUNNING: ./llvm-cmov-bench-NEW --benchmark_out=/tmp/tmpPvwpfW
2019-03-06 21:56:58
Running ./llvm-cmov-bench-NEW
Run on (8 X 4000 MHz CPU s)
CPU Caches:
L1 Data 16K (x8)
L1 Instruction 64K (x4)
L2 Unified 2048K (x4)
L3 Unified 8192K (x1)
Load Average: 1.17, 1.46, 1.30
----------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations UserCounters<...>
----------------------------------------------------------------------------------------------------
<...>
BM_StdMidpoint<int32_t, RandRand>/131072 300878 ns 300880 ns 2324 bytes_read/iteration=1024k bytes_read/sec=3.24569G/s midpoints=304.611M midpoints/sec=435.629M/s
BM_StdMidpoint<int32_t, RandRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<int32_t, RandRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<uint32_t, RandRand>/131072 300231 ns 300226 ns 2330 bytes_read/iteration=1024k bytes_read/sec=3.25276G/s midpoints=305.398M midpoints/sec=436.578M/s
BM_StdMidpoint<uint32_t, RandRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<uint32_t, RandRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<int64_t, RandRand>/65536 170819 ns 170777 ns 4115 bytes_read/iteration=1024k bytes_read/sec=5.71835G/s midpoints=269.681M midpoints/sec=383.752M/s
BM_StdMidpoint<int64_t, RandRand>_BigO 2.60 N 2.60 N
BM_StdMidpoint<int64_t, RandRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<uint64_t, RandRand>/65536 171705 ns 171708 ns 4106 bytes_read/iteration=1024k bytes_read/sec=5.68733G/s midpoints=269.091M midpoints/sec=381.671M/s
BM_StdMidpoint<uint64_t, RandRand>_BigO 2.62 N 2.62 N
BM_StdMidpoint<uint64_t, RandRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<int16_t, RandRand>/262144 592510 ns 592516 ns 1182 bytes_read/iteration=1024k bytes_read/sec=1.64816G/s midpoints=309.854M midpoints/sec=442.425M/s
BM_StdMidpoint<int16_t, RandRand>_BigO 2.26 N 2.26 N
BM_StdMidpoint<int16_t, RandRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<uint16_t, RandRand>/262144 614823 ns 614823 ns 1180 bytes_read/iteration=1024k bytes_read/sec=1.58836G/s midpoints=309.33M midpoints/sec=426.373M/s
BM_StdMidpoint<uint16_t, RandRand>_BigO 2.33 N 2.33 N
BM_StdMidpoint<uint16_t, RandRand>_RMS 4 % 4 %
<...>
BM_StdMidpoint<int8_t, RandRand>/524288 1073181 ns 1073201 ns 650 bytes_read/iteration=1024k bytes_read/sec=931.791M/s midpoints=340.787M midpoints/sec=488.527M/s
BM_StdMidpoint<int8_t, RandRand>_BigO 2.05 N 2.05 N
BM_StdMidpoint<int8_t, RandRand>_RMS 1 % 1 %
BM_StdMidpoint<uint8_t, RandRand>/524288 1071010 ns 1071020 ns 653 bytes_read/iteration=1024k bytes_read/sec=933.689M/s midpoints=342.36M midpoints/sec=489.522M/s
BM_StdMidpoint<uint8_t, RandRand>_BigO 2.05 N 2.05 N
BM_StdMidpoint<uint8_t, RandRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<uint32_t, ZeroRand>/131072 300413 ns 300416 ns 2330 bytes_read/iteration=1024k bytes_read/sec=3.2507G/s midpoints=305.398M midpoints/sec=436.302M/s
BM_StdMidpoint<uint32_t, ZeroRand>_BigO 2.29 N 2.29 N
BM_StdMidpoint<uint32_t, ZeroRand>_RMS 2 % 2 %
<...>
BM_StdMidpoint<uint64_t, ZeroRand>/65536 169667 ns 169669 ns 4123 bytes_read/iteration=1024k bytes_read/sec=5.75568G/s midpoints=270.205M midpoints/sec=386.257M/s
BM_StdMidpoint<uint64_t, ZeroRand>_BigO 2.59 N 2.59 N
BM_StdMidpoint<uint64_t, ZeroRand>_RMS 3 % 3 %
<...>
BM_StdMidpoint<uint16_t, ZeroRand>/262144 591396 ns 591404 ns 1184 bytes_read/iteration=1024k bytes_read/sec=1.65126G/s midpoints=310.378M midpoints/sec=443.257M/s
BM_StdMidpoint<uint16_t, ZeroRand>_BigO 2.26 N 2.26 N
BM_StdMidpoint<uint16_t, ZeroRand>_RMS 1 % 1 %
<...>
BM_StdMidpoint<uint8_t, ZeroRand>/524288 1069421 ns 1069413 ns 655 bytes_read/iteration=1024k bytes_read/sec=935.092M/s midpoints=343.409M midpoints/sec=490.258M/s
BM_StdMidpoint<uint8_t, ZeroRand>_BigO 2.04 N 2.04 N
BM_StdMidpoint<uint8_t, ZeroRand>_RMS 0 % 0 %
Comparing ./llvm-cmov-bench-OLD to ./llvm-cmov-bench-NEW
Benchmark Time CPU Time Old Time New CPU Old CPU New
----------------------------------------------------------------------------------------------------------------------------------------
<...>
BM_StdMidpoint<int32_t, RandRand>/131072 +0.0016 +0.0016 300398 300878 300404 300880
<...>
BM_StdMidpoint<uint32_t, RandRand>/131072 -0.0007 -0.0007 300433 300231 300433 300226
<...>
BM_StdMidpoint<int64_t, RandRand>/65536 +0.0057 +0.0054 169857 170819 169858 170777
<...>
BM_StdMidpoint<uint64_t, RandRand>/65536 +0.0114 +0.0114 169770 171705 169771 171708
<...>
BM_StdMidpoint<int16_t, RandRand>/262144 +0.0023 +0.0023 591169 592510 591179 592516
<...>
BM_StdMidpoint<uint16_t, RandRand>/262144 +0.0398 +0.0398 591264 614823 591274 614823
<...>
BM_StdMidpoint<int8_t, RandRand>/524288 -0.6403 -0.6403 2983669 1073181 2983689 1073201
<...>
BM_StdMidpoint<uint8_t, RandRand>/524288 -0.5986 -0.5986 2668398 1071010 2668419 1071020
<...>
BM_StdMidpoint<uint32_t, ZeroRand>/131072 -0.0016 -0.0016 300887 300413 300887 300416
<...>
BM_StdMidpoint<uint64_t, ZeroRand>/65536 +0.0002 +0.0002 169634 169667 169634 169669
<...>
BM_StdMidpoint<uint16_t, ZeroRand>/262144 -0.0014 -0.0014 592252 591396 592255 591404
<...>
BM_StdMidpoint<uint8_t, ZeroRand>/524288 +0.0832 +0.0832 987295 1069421 987309 1069413
```
What can we tell from the benchmark?
* `BM_StdMidpoint<[u]int8_t, RandRand>` indeed has the worst performance.
* All `BM_StdMidpoint<uint{8,16,32}_t, ZeroRand>` are all performant, even the 8-bit case.
That is because there we are computing mid point between zero and some random number,
thus if the branch predictor is in use, it is in optimal situation.
* Promoting 8-bit CMOV did improve performance of `BM_StdMidpoint<[u]int8_t, RandRand>`, by -59%..-64%.
# What about branch predictor?
* `BM_StdMidpoint<uint8_t, ZeroRand>` was faster than `BM_StdMidpoint<uint{16,32,64}_t, ZeroRand>`,
which may mean that well-predicted branch is better than `cmov`.
* Promoting 8-bit CMOV degraded performance of `BM_StdMidpoint<uint8_t, ZeroRand>`,
`cmov` is up to +10% worse than well-predicted branch.
* However, i do not believe this is a concern. If the branch is well predicted, then the PGO
will also say that it is well predicted, and LLVM will happily expand cmov back into branch:
https://godbolt.org/z/P5ufig
# What about partial register stalls?
I'm not really able to answer that.
What i can say is that if the branch is unpredictable (if it is predictable, then use PGO and you'll have branch)
in ~50% of cases you will have to pay branch misprediction penalty.
```
$ grep -i MispredictPenalty X86Sched*.td
X86SchedBroadwell.td: let MispredictPenalty = 16;
X86SchedHaswell.td: let MispredictPenalty = 16;
X86SchedSandyBridge.td: let MispredictPenalty = 16;
X86SchedSkylakeClient.td: let MispredictPenalty = 14;
X86SchedSkylakeServer.td: let MispredictPenalty = 14;
X86ScheduleBdVer2.td: let MispredictPenalty = 20; // Minimum branch misdirection penalty.
X86ScheduleBtVer2.td: let MispredictPenalty = 14; // Minimum branch misdirection penalty
X86ScheduleSLM.td: let MispredictPenalty = 10;
X86ScheduleZnver1.td: let MispredictPenalty = 17;
```
.. which it can be as small as 10 cycles and as large as 20 cycles.
Partial register stalls do not seem to be an issue for AMD CPU's.
For intel CPU's, they should be around ~5 cycles?
Is that actually an issue here? I'm not sure.
In short, i'd say this is an improvement, at least on this microbenchmark.
Fixes [[ https://bugs.llvm.org/show_bug.cgi?id=40965 | PR40965 ]].
Reviewers: craig.topper, RKSimon, spatel, andreadb, nikic
Reviewed By: craig.topper, andreadb
Subscribers: jfb, jdoerfert, llvm-commits, mclow.lists
Tags: #llvm, #libc
Differential Revision: https://reviews.llvm.org/D59035
llvm-svn: 356300
Nikita Popov [Fri, 15 Mar 2019 21:04:34 +0000 (21:04 +0000)]
[AArch64] Turn BIC immediate creation into a DAG combine
Switch BIC immediate creation for vector ANDs from custom lowering
to a DAG combine, which gives generic DAG combines a change to
apply first. In particular this avoids (and x, -1) being turned into
a (bic x, 0) instead of being eliminated entirely.
Differential Revision: https://reviews.llvm.org/D59187
llvm-svn: 356299
Changpeng Fang [Fri, 15 Mar 2019 21:02:48 +0000 (21:02 +0000)]
AMDGPU: Fix a SIAnnotateControlFlow issue when there are multiple backedges.
Summary:
At the exit of the loop, the compiler uses a register to remember and accumulate
the number of threads that have already exited. When all active threads exit the
loop, this register is used to restore the exec mask, and the execution continues
for the post loop code.
When there is a "continue" in the loop, the compiler made a mistake to reset the
register to 0 when the "continue" backedge is taken. This will result in some
threads not executing the post loop code as they are supposed to.
This patch fixed the issue.
Reviewers:
nhaehnle, arsenm
Differential Revision:
https://reviews.llvm.org/D59312
llvm-svn: 356298
Alex Langford [Fri, 15 Mar 2019 20:43:53 +0000 (20:43 +0000)]
[CMake] Correct CMake message mode
Summary:
This wasn't actually printing out a CMake warning, it was prepending
"WARN" to the message.
Reviewers: zturner
Subscribers: mgorny, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59432
llvm-svn: 356297
Brian Gesiak [Fri, 15 Mar 2019 20:25:49 +0000 (20:25 +0000)]
[coroutines][PR40978] Emit error for co_yield within catch block
Summary:
As reported in https://bugs.llvm.org/show_bug.cgi?id=40978, it's an
error to use the `co_yield` or `co_await` keywords outside of a valid
"suspension context" as defined by [expr.await]p2 of
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4775.pdf.
Whether or not the current scope was in a function-try-block's
(https://en.cppreference.com/w/cpp/language/function-try-block) handler
could be determined using scope flag `Scope::FnTryCatchScope`. No
such flag existed for a simple C++ catch statement, so this commit adds
one.
Reviewers: GorNishanov, tks2103, rsmith
Reviewed By: GorNishanov
Subscribers: EricWF, jdoerfert, cfe-commits, lewissbaker
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59076
llvm-svn: 356296
Dan Liew [Fri, 15 Mar 2019 20:14:46 +0000 (20:14 +0000)]
[CMake] Fix broken uses of `try_compile_only()` and improve the function.
Summary:
There were existing calls to `try_compile_only()` with arguments not
prefixed by `SOURCE` or `FLAGS`. These were silently being ignored.
It looks like the `SOURCE` and `FLAGS` arguments were first introduced
in r278454.
One implication of this is that for a builtins only build for Darwin
(see `darwin_test_archs()`) it would mean we weren't actually passing
`-arch <arch>` to the compiler). This would result in compiler-rt
claiming all supplied architectures could be targetted provided
the compiler could build for Clang's default architecture.
This patch fixes this in several ways.
* Fixes all incorrect calls to `try_compile_only()`.
* Adds code to `try_compile_only()` to check for unhandled arguments
and raises a fatal error if this occurs. This should stop any
incorrect calls in the future.
* Improve the documentation on `try_compile_only()` which seemed
completely wrong.
rdar://problem/
48928526
Reviewers: beanz, fjricci, dsanders, kubamracek, yln, dcoughlin
Subscribers: mgorny, jdoerfert, #sanitizers, llvm-commits
Tags: #llvm, #sanitizers
Differential Revision: https://reviews.llvm.org/D59429
llvm-svn: 356295
Craig Topper [Fri, 15 Mar 2019 19:59:35 +0000 (19:59 +0000)]
[X86] Strip the SAE bit from the rounding mode passed to the _RND opcodes. Use TargetConstant to save a conversion in the isel table.
The asm parser generates the immediate without the SAE bit. So for consistency we should generate the MCInst the same way from CodeGen.
Since they are now both the same, remove the masking from the printer and replace with an llvm_unreachable.
Use a target constant since we're rebuilding the node anyway. Then we don't have to have isel convert it. Saves about 500 bytes from the isel table.
llvm-svn: 356294
Philip Reames [Fri, 15 Mar 2019 19:54:06 +0000 (19:54 +0000)]
[SimplifyDemandedVec] Strengthen handling all undef lanes (particularly GEPs)
A change of two parts:
1) A generic enhancement for all callers of SDVE to exploit the fact that if all lanes are undef, the result is undef.
2) A GEP specific piece to strengthen/fix the vector index undef element handling, and call into the generic infrastructure when visiting the GEP.
The result is that we replace a vector gep with at least one undef in each lane with a undef. We can also do the same for vector intrinsics. Once the masked.load patch (D57372) has landed, I'll update to include call tests as well.
Differential Revision: https://reviews.llvm.org/D57468
llvm-svn: 356293
Simon Pilgrim [Fri, 15 Mar 2019 19:14:28 +0000 (19:14 +0000)]
[X86][SSE] Fold scalar_to_vector(i64 anyext(x)) -> bitcast(scalar_to_vector(i32 anyext(x)))
Reduce the size of an any-extended i64 scalar_to_vector source to i32 - the any_extend nodes are often introduced by SimplifyDemandedBits.
llvm-svn: 356292
Evgeny Mankov [Fri, 15 Mar 2019 19:04:46 +0000 (19:04 +0000)]
[CUDA][Windows] Partial fix for bug 38811 (Step 2 of 3)
Partial fix for the clang Bug 38811 "Clang fails to compile with CUDA-9.x on Windows".
[Synopsis]
__sptr is a new Microsoft specific modifier (https://docs.microsoft.com/en-us/cpp/cpp/sptr-uptr?view=vs-2017).
[Solution]
Replace all `__sptr` occurrences with `__s` (and all `__cptr` with `__c` as well) to eliminate the below clang compilation error on Windows.
In file included from C:\GIT\LLVM\trunk\llvm-64-release-vs2017-15.9.5\dist\lib\clang\9.0.0\include\__clang_cuda_runtime_wrapper.h:162:
C:\GIT\LLVM\trunk\llvm-64-release-vs2017-15.9.5\dist\lib\clang\9.0.0\include\__clang_cuda_device_functions.h:524:33: error: expected expression
return __nv_fast_sincosf(__a, __sptr, __cptr);
^
Reviewed by: Artem Belevich
Differential Revision: http://reviews.llvm.org/D59423
llvm-svn: 356291
Nikita Popov [Fri, 15 Mar 2019 18:37:45 +0000 (18:37 +0000)]
[ValueTracking] Use ConstantRange overflow checks for unsigned add/sub; NFC
Use the methods introduced in rL356276 to implement the
computeOverflowForUnsigned(Add|Sub) functions in ValueTracking, by
converting the KnownBits into a ConstantRange.
This is NFC: The existing KnownBits based implementation uses the same
logic as the the ConstantRange based one. This is not the case for the
signed equivalents, so I'm only changing unsigned here.
This is in preparation for D59386, which will also intersect the
computeConstantRange() result into the range determined from KnownBits.
llvm-svn: 356290
Jonathan Peyton [Fri, 15 Mar 2019 18:27:14 +0000 (18:27 +0000)]
[OpenMP] Add missing parenthesis in Perl module
llvm-svn: 356289
Jonathan Peyton [Fri, 15 Mar 2019 18:24:59 +0000 (18:24 +0000)]
[OpenMP] Remove deprecated taskq
Remove very old, unused, and deprecated taskq code.
Patch by Terry Wilmarth
Differential Revision: https://reviews.llvm.org/D58989
llvm-svn: 356288
Sanjay Patel [Fri, 15 Mar 2019 18:14:25 +0000 (18:14 +0000)]
[InstCombine] add tests for logic of NaN fcmps; NFC
llvm-svn: 356287
Nikita Popov [Fri, 15 Mar 2019 18:08:06 +0000 (18:08 +0000)]
[ConstantRange] Try to fix compiler warnings; NFC
Try to fix "ignoring return value" and "default label" errors on
clang-with-thin-lto-ubuntu buildbot.
llvm-svn: 356286
Philip Reames [Fri, 15 Mar 2019 18:06:32 +0000 (18:06 +0000)]
[tests] Add a test for constexpr mask as requested in D57372
llvm-svn: 356285
Zachary Turner [Fri, 15 Mar 2019 18:00:43 +0000 (18:00 +0000)]
Abbreviation declarations are required to have non-null tags.
Treat a null tag as an error.
llvm-svn: 356284
Sanjay Patel [Fri, 15 Mar 2019 18:00:28 +0000 (18:00 +0000)]
[InstCombine] add tests for masked store/scatter; NFC
Baseline tests for D57247
llvm-svn: 356283
Amara Emerson [Fri, 15 Mar 2019 18:00:01 +0000 (18:00 +0000)]
[AArch64][GlobalISel] Regbankselect: Fix G_BUILD_VECTOR trying to use s16 gpr sources.
Since we can't insert s16 gprs as we don't have 16 bit GPR registers, we need to
teach RBS to assign them to the FPR bank so our selector works.
llvm-svn: 356282
Julian Lettner [Fri, 15 Mar 2019 17:52:27 +0000 (17:52 +0000)]
[TSan][libdispatch] Enable linking and running of tests on Linux
When COMPILER_RT_INTERCEPT_LIBDISPATCH is ON the TSan runtime library
now has a dependency on the blocks runtime and libdispatch. Make sure we
set all the required linking options.
Also add cmake options for specifying additional library paths to
instruct the linker where to search for libdispatch and the blocks
runtime. This allows us to build TSan runtime with libdispatch support
without installing those libraries into default linker library paths.
`CMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY` is necessary to avoid
aborting the build due to failing the link step in CMake's
check_c_compiler test.
Reviewed By: dvyukov, kubamracek
Differential Revision: https://reviews.llvm.org/D59334
llvm-svn: 356281
Philip Reames [Fri, 15 Mar 2019 17:50:30 +0000 (17:50 +0000)]
[X86][GlobalISEL] Support lowering aligned unordered atomics
The existing lowering code is accidentally correct for unordered atomics as far as I can tell. An unordered atomic has no memory ordering, and simply requires the actual load or store to be done as a single well aligned instruction. As such, relax the restriction while adding tests to ensure the lowering remains correct in the future.
Differential Revision: https://reviews.llvm.org/D57803
llvm-svn: 356280
Yonghong Song [Fri, 15 Mar 2019 17:39:10 +0000 (17:39 +0000)]
[BPF] handle external global properly
Previous commit
6bc58e6d3dbd ("[BPF] do not generate unused local/global types")
tried to exclude global variable from type generation. The condition is:
if (Global.hasExternalLinkage())
continue;
This is not right. It also excluded initialized globals.
The correct condition (from AssemblyWriter::printGlobal()) is:
if (!GV->hasInitializer() && GV->hasExternalLinkage())
Out << "external ";
Let us do the same in BTF type generation. Also added a test for it.
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 356279
Zachary Turner [Fri, 15 Mar 2019 17:32:05 +0000 (17:32 +0000)]
Return Error and Expected from more DWARF interfaces.
This continues the work of introducing Error and Expected into
the DWARF parsing interfaces, this time for the DWARFCompileUnit
and DWARFDebugAranges classes.
Differential Revision: https://reviews.llvm.org/D59381
llvm-svn: 356278
Aaron Enye Shi [Fri, 15 Mar 2019 17:31:51 +0000 (17:31 +0000)]
[HIP-Clang] propagate -mllvm options to opt and llc
Change the HIP Toolchain to pass the OPT_mllvm options into OPT and LLC stages. Added a lit test to verify the command args.
Reviewers: yaxunl
Differential Revision: https://reviews.llvm.org/D59316
llvm-svn: 356277
Nikita Popov [Fri, 15 Mar 2019 17:29:05 +0000 (17:29 +0000)]
[ConstantRange] Add overflow check helpers
Add functions to ConstantRange that determine whether the
unsigned/signed addition/subtraction of two ConstantRanges
may/always/never overflows. This will allow checking overflow
conditions based on known constant ranges in addition to known bits.
I'm implementing these methods on ConstantRange to allow them to be
unit tested independently of any ValueTracking machinery. The tests
include exhaustive testing on 4-bit ranges, to make sure the result
is both conservatively correct and maximally precise.
The OverflowResult enum is redeclared on ConstantRange, because
I wanted to avoid a dependency in either direction between
ValueTracking.h and ConstantRange.h.
Differential Revision: https://reviews.llvm.org/D59193
llvm-svn: 356276
Adrian Prantl [Fri, 15 Mar 2019 17:22:00 +0000 (17:22 +0000)]
Implement a better way of not passing the sanitizer environment on to tests.
rdar://problem/
48889580
llvm-svn: 356275
Simon Pilgrim [Fri, 15 Mar 2019 17:17:37 +0000 (17:17 +0000)]
[AArch64] Regenerate build vector tests
llvm-svn: 356274
Simon Pilgrim [Fri, 15 Mar 2019 17:00:55 +0000 (17:00 +0000)]
[SelectionDAG] Add SimplifyDemandedBits handling for ISD::SCALAR_TO_VECTOR
Fixes a lot of constant folding mismatches between i686 and x86_64
llvm-svn: 356273
Robert Widmann [Fri, 15 Mar 2019 16:57:23 +0000 (16:57 +0000)]
[LLVM-C] Expose the "Add Discriminators" Pass To LLVM-C
Summary: Add bindings to create a wrapped "Add Discriminators" pass. Now that we have debug info support, this is a handy transform to have.
Reviewers: whitequark, deadalnix
Reviewed By: whitequark
Subscribers: dblaikie, aprantl, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D58624
llvm-svn: 356272
Davide Italiano [Fri, 15 Mar 2019 16:55:51 +0000 (16:55 +0000)]
[DataFormatters] Remove LLDB_DISABLE_PYTHON from TypeCategory.
llvm-svn: 356271
Simon Pilgrim [Fri, 15 Mar 2019 16:16:49 +0000 (16:16 +0000)]
[X86] Add SimplifyDemandedBitsForTargetNode support for PINSRB/PINSRW
llvm-svn: 356270
Pavel Labath [Fri, 15 Mar 2019 15:34:10 +0000 (15:34 +0000)]
YAMLIO: Improve endian type support
Summary:
Now that endian types support enumerations (D59141), the existing yaml
support for them is somewhat insufficient. The current solution was to
define the ScalarTraits class for these types, which always forwards to
the ScalarTraits of the underlying type. However, the enum types will
usually have ScalarEnumerationTraits of ScalarBitsetTraits.
In this patch I add the two extra Traits types to the endian types. In
order to properly SFINAE-ize them, I've also added an extra "Enable"
template argument to the Traits template classes.
Reviewers: zturner, sammccall
Subscribers: kristina, Bigcheese, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59289
llvm-svn: 356269
Teresa Johnson [Fri, 15 Mar 2019 15:11:38 +0000 (15:11 +0000)]
[ThinLTO] Restructure AliasSummary to contain ValueInfo of Aliasee
Summary:
The AliasSummary previously contained the AliaseeGUID, which was only
populated when reading the summary from bitcode. This patch changes it
to instead hold the ValueInfo of the aliasee, and always populates it.
This enables more efficient access to the ValueInfo (specifically in the
recent patch r352438 which needed to perform an index hash table lookup
using the aliasee GUID).
As noted in the comments in AliasSummary, we no longer technically need
to keep a pointer to the corresponding aliasee summary, since it could
be obtained by walking the list of summaries on the ValueInfo looking
for the summary in the same module. However, I am concerned that this
would be inefficient when walking through the index during the thin
link for various analyses. That can be reevaluated in the future.
By always populating this new field, we can remove the guard and special
handling for a 0 aliasee GUID when dumping the dot graph of the summary.
An additional improvement in this patch is when reading the summaries
from LLVM assembly we now set the AliaseeSummary field to the aliasee
summary in that same module, which makes it consistent with the behavior
when reading the summary from bitcode.
Reviewers: pcc, mehdi_amini
Subscribers: inglorion, eraman, steven_wu, dexonsmith, arphaman, llvm-commits
Differential Revision: https://reviews.llvm.org/D57470
llvm-svn: 356268
Simon Pilgrim [Fri, 15 Mar 2019 15:07:44 +0000 (15:07 +0000)]
[Hexagon] Remove icmp undef from reduced tests
Pre-commit for D59363 (Add icmp UNDEF handling to SelectionDAG::FoldSetCC)
Approved by @kparzysz (Krzysztof Parzyszek)
llvm-svn: 356267
Marshall Clow [Fri, 15 Mar 2019 15:00:41 +0000 (15:00 +0000)]
Update a deque test with more assertions. NFC
llvm-svn: 356266
Mircea Trofin [Fri, 15 Mar 2019 15:00:12 +0000 (15:00 +0000)]
[llvm] Skip over empty line table entries.
Summary:
This is similar to how addr2line handles consecutive entries with the
same address - pick the last one.
Reviewers: dblaikie, friss, JDevlieghere
Reviewed By: dblaikie
Subscribers: eugenis, vitalybuka, echristo, JDevlieghere, probinson, aprantl, hiraditya, rupprecht, jdoerfert, llvm-commits
Tags: #llvm, #debug-info
Differential Revision: https://reviews.llvm.org/D58952
llvm-svn: 356265
Ilya Biryukov [Fri, 15 Mar 2019 14:30:07 +0000 (14:30 +0000)]
[clangd] Remove includes of "gmock-matchers.h". NFC
For consistency with most of the test code.
llvm-svn: 356264
Pavel Labath [Fri, 15 Mar 2019 14:03:52 +0000 (14:03 +0000)]
Fix a typo in FindLibEdit.cmake
The package name is LibEdit, so we should use that name in the call to
find_package_handle_standard_args. Failing to do so results in the
standard_args (such as the one telling us whether REQUIRED was used in
the find_package invocation) not being handled.
llvm-svn: 356263
Pavel Labath [Fri, 15 Mar 2019 14:02:35 +0000 (14:02 +0000)]
Delete type_sp member from TypePair
Summary:
As discussed in the review of D59217, this member is unnecessary since
always the first thing we do is convert it to a CompilerType.
This opens up possibilities for further cleanups (e.g. the whole
TypePair class now loses purpose, since we can just pass around
CompilerType everywhere), but I did not want to do that yet, because I
am not sure if this will not introduce breakages in some of the
platforms/configurations that I am not testing on.
Reviewers: clayborg, zturner, jingham
Subscribers: jdoerfert, lldb-commits
Differential Revision: https://reviews.llvm.org/D59297
llvm-svn: 356262
Ilya Biryukov [Fri, 15 Mar 2019 14:00:49 +0000 (14:00 +0000)]
[clangd] Tune the fuzzy-matching algorithm
Summary:
To reduce the gap between prefix and initialism matches.
The motivation is producing better scoring in one particular example,
but the change does not seem to cause large regressions in other cases.
The examples is matching 'up' against 'unique_ptr' and 'upper_bound'.
Before the change, we had:
- "[u]nique_[p]tr" with a score of 0.3,
- "[up]per_bound" with a score of 1.0.
A 3x difference meant that symbol quality signals were almost always ignored
and 'upper_bound' was always ranked higher.
However, intuitively, the match scores should be very close for the two.
After the change we have the following scores:
- "[u]nique_[p]tr" with a score of 0.75,
- "[up]per_bound" with a score of 1.0.
Reviewers: ioeric
Reviewed By: ioeric
Subscribers: MaskRay, jkorous, arphaman, kadircet, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59300
llvm-svn: 356261
Mikael Holmen [Fri, 15 Mar 2019 13:51:05 +0000 (13:51 +0000)]
[CodeGenPrepare] avoid crashing from replacing a phi twice
Summary:
This is a fix to bug 41052:
https://bugs.llvm.org/show_bug.cgi?id=41052
While trying to optimize a memory instruction in a dead basic block, we end up registering the same phi for replacement twice. This patch avoids registering more than the first replacement candidate for a phi.
Patch by: JesperAntonsson
Reviewers: skatkov, aprantl
Reviewed By: aprantl
Subscribers: jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59358
llvm-svn: 356260
Sam Parker [Fri, 15 Mar 2019 13:36:37 +0000 (13:36 +0000)]
[ARM] Remove EarlyCSE from backend
There is an issue with early CSE hitting an assert, so temporarily
remove the pass from the Arm backend.
Bug: https://bugs.llvm.org/show_bug.cgi?id=41081
Differential Revision: https://reviews.llvm.org/D59410
llvm-svn: 356259
Michael Liao [Fri, 15 Mar 2019 12:42:21 +0000 (12:42 +0000)]
[AMDGPU] Fix SGPR fixing through SCC chaining
Summary:
- During the fixing of SGPR copying from VGPR, ensure users of SCC is
properly propagated, i.e.
* only propagate through live def of SCC,
* skip the SCC-def inst itself, and
* stop the propagation on the other SCC-def inst after checking its
SCC-use first.
Subscribers: arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59362
llvm-svn: 356258
Florian Hahn [Fri, 15 Mar 2019 12:37:50 +0000 (12:37 +0000)]
[LSR] Update test from rL356256 after rebase.
llvm-svn: 356257
Florian Hahn [Fri, 15 Mar 2019 12:17:36 +0000 (12:17 +0000)]
[LSR] Check for signed overflow in NarrowSearchSpaceByDetectingSupersets.
We are adding a sign extended IR value to an int64_t, which can cause
signed overflows, as in the attached test case, where we have a formula
with BaseOffset = -1 and a constant with numeric_limits<int64_t>::min().
If the addition would overflow, skip the simplification for this
formula. Note that the target triple is required to trigger the failure.
Reviewers: qcolombet, gilr, kparzysz, efriedma
Reviewed By: efriedma
Differential Revision: https://reviews.llvm.org/D59211
llvm-svn: 356256
Evgeny Mankov [Fri, 15 Mar 2019 12:05:36 +0000 (12:05 +0000)]
[CUDA][Windows] Partial fix for bug #38811 (Step 1 of 3)
Partial fix for the clang Bug https://bugs.llvm.org/show_bug.cgi?id=38811 "Clang fails to compile with CUDA-9.x on Windows".
Adding defined(_WIN64) check along with existing #if defined(__LP64__) eliminates the below clang (64-bit) compilation error on Windows.
C:/GIT/LLVM/trunk/llvm-64-release-vs2017/dist/lib/clang/9.0.0\include\__clang_cuda_device_functions.h(1609,45): error GEF7559A7: no matching function for call to 'roundf'
__DEVICE__ long lroundf(float __a) { return roundf(__a); }
Reviewed by: Artem Belevich
Differential Revision: http://reviews.llvm.org/D59361
llvm-svn: 356255
Nico Weber [Fri, 15 Mar 2019 11:54:01 +0000 (11:54 +0000)]
Rename directory housing clang-change-namespace to be eponymous
Makes the name of this directory consistent with the names of the other
directories in clang-tools-extra.
Differential Revision: https://reviews.llvm.org/D59382
llvm-svn: 356254
Simon Pilgrim [Fri, 15 Mar 2019 11:24:17 +0000 (11:24 +0000)]
[SPARC] Regenerate label test for D59363
llvm-svn: 356253
Simon Pilgrim [Fri, 15 Mar 2019 11:14:59 +0000 (11:14 +0000)]
[ARM] Remove icmp undef from reduced tests
Pre-commit for D59363 (Add icmp UNDEF handling to SelectionDAG::FoldSetCC)
Approved by @efriedma (Eli Friedman)
llvm-svn: 356252
Simon Pilgrim [Fri, 15 Mar 2019 11:13:26 +0000 (11:13 +0000)]
[WebAssembly] Remove icmp undef in stackify test
Pre-commit for D59363 (Add icmp UNDEF handling to SelectionDAG::FoldSetCC)
Approved by @tlively (Thomas Lively)
llvm-svn: 356251
Benjamin Kramer [Fri, 15 Mar 2019 11:09:41 +0000 (11:09 +0000)]
Make getFullyQualifiedName qualify both the pointee and class type for member ptr types
We already handle pointers and references, member ptrs are just another
special case. Fixes PR40732.
Differential Revision: https://reviews.llvm.org/D59387
llvm-svn: 356250
Simon Pilgrim [Fri, 15 Mar 2019 11:05:42 +0000 (11:05 +0000)]
[X86][SSE] Attempt to convert SSE shift-by-var to shift-by-imm.
Prep work for PR40203
llvm-svn: 356249
Fangrui Song [Fri, 15 Mar 2019 10:43:51 +0000 (10:43 +0000)]
[llvm-profdata] Deleted unused Cutoffs added by D16005
llvm-svn: 356248
James Henderson [Fri, 15 Mar 2019 10:35:27 +0000 (10:35 +0000)]
[yaml2obj]Allow explicit setting of p_filesz, p_memsz, and p_offset
yaml2obj currently derives the p_filesz, p_memsz, and p_offset values of
program headers from their sections. This makes writing tests for
certain formats more complex, and sometimes impossible. This patch
allows setting these fields explicitly, overriding the default value,
when relevant.
Reviewed by: jakehehrlich, Higuoxing
Differential Revision: https://reviews.llvm.org/D59372
llvm-svn: 356247
Fangrui Song [Fri, 15 Mar 2019 10:34:57 +0000 (10:34 +0000)]
[llvm-readobj] Delete unused variable. NFC
llvm-svn: 356246
Fangrui Song [Fri, 15 Mar 2019 10:27:28 +0000 (10:27 +0000)]
[llvm-objcopy] Delete unused parameter from replaceDebugSections. NFC
llvm-svn: 356245
Fangrui Song [Fri, 15 Mar 2019 10:20:51 +0000 (10:20 +0000)]
[llvm-objcopy] Don't use {}; NFC
llvm-svn: 356244
Sam Parker [Fri, 15 Mar 2019 10:19:32 +0000 (10:19 +0000)]
[ARM][ParallelDSP] Disable for big-endian
Bail early when we don't have a preheader and also if the target is
big endian because it's written with only little endian in mind!
Differential Revision: https://reviews.llvm.org/D59368
llvm-svn: 356243
Jonas Hahnfeld [Fri, 15 Mar 2019 10:15:13 +0000 (10:15 +0000)]
[msan] Fix BMI2 detection in msan tests, take 2.
It's not enough if only one bit is present, we need to check that
both are set. This finally fixes the test failures for me.
llvm-svn: 356242
Fangrui Song [Fri, 15 Mar 2019 09:40:03 +0000 (09:40 +0000)]
[COFF] Delete unused declarations and add a missing forward declaration. NFC
llvm-svn: 356241
Fangrui Song [Fri, 15 Mar 2019 07:16:39 +0000 (07:16 +0000)]
[ELF] Delete unused forward declarations and unused DynamicReloc::getInputSec(). NFC
llvm-svn: 356239
Petar Avramovic [Fri, 15 Mar 2019 07:07:50 +0000 (07:07 +0000)]
[MIPS GlobalISel] Improve selection of constants
Certain 32 bit constants can be generated with a single instruction
instead of two. Implement materialize32BitImm function for MIPS32.
Differential Revision: https://reviews.llvm.org/D59369
llvm-svn: 356238
Fangrui Song [Fri, 15 Mar 2019 06:58:23 +0000 (06:58 +0000)]
[ELF] De-template wrapSymbols, isReserved and addGotEntry. NFC
llvm-svn: 356237
Yonghong Song [Fri, 15 Mar 2019 05:51:25 +0000 (05:51 +0000)]
[BPF] do not generate unused local/global types
The kernel currently has a limit for # of types to be 64KB and
the size of string subsection to be 64KB. A simple bcc tool
runqlat.py generates:
. the size of ~33KB type section, roughly ~10K types
. the size of ~17KB string section
The majority type is from the types referenced by local
variables in the bpf program. For example, the kernel "task_struct"
itself recursively brings in ~900 other types.
This patch did the following optimization to avoid generating
unused types:
. do not generate types for local variables unless they are
function arguments.
. do not generate types for external globals.
If an external global is not used in the program, llvm
already removes it from IR, so global variable saving is
typical small. For runqlat.py, only one variable "llvm.used"
is the external global.
The types for locals and external globals can be added back
once there is a usage for them.
After the above optimization, the runqlat.py generates:
. the size of ~1.5KB type section, roughtly 500 types
. the size of ~0.7KB string section
UPDATE:
resubmitted the patch after previous revert with
the following fix:
use Global.hasExternalLinkage() to test "external"
linkage instead of using Global.getInitializer(),
which will assert on external variables.
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 356234
Yonghong Song [Fri, 15 Mar 2019 05:02:19 +0000 (05:02 +0000)]
Revert "[BPF] do not generate unused local/global types"
This reverts commit r356232.
Reason: test failure with ASSERT on enabled build.
llvm-svn: 356233
Yonghong Song [Fri, 15 Mar 2019 04:42:01 +0000 (04:42 +0000)]
[BPF] do not generate unused local/global types
The kernel currently has a limit for # of types to be 64KB and
the size of string subsection to be 64KB. A simple bcc tool
runqlat.py generates:
. the size of ~33KB type section, roughly ~10K types
. the size of ~17KB string section
The majority type is from the types referenced by local
variables in the bpf program. For example, the kernel "task_struct"
itself recursively brings in ~900 other types.
This patch did the following optimization to avoid generating
unused types:
. do not generate types for local variables unless they are
function arguments.
. do not generate types for external globals.
If an external global is not used in the program, llvm
already removes it from IR, so global variable saving is
typical small. For runqlat.py, only one variable "llvm.used"
is the external global.
The types for locals and external globals can be added back
once there is a usage for them.
After the above optimization, the runqlat.py generates:
. the size of ~1.5KB type section, roughtly 500 types
. the size of ~0.7KB string section
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 356232
Richard Trieu [Fri, 15 Mar 2019 04:26:02 +0000 (04:26 +0000)]
Remove an assert in template pack deduction during nested instantiation.
llvm-svn: 356231
Fangrui Song [Fri, 15 Mar 2019 03:37:42 +0000 (03:37 +0000)]
[ELF] Add a test for large .bss.rel.ro
Reviewers: ruiu, pcc, espindola
Reviewed By: pcc
Subscribers: emaste, arichardson, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59404
llvm-svn: 356230
Fangrui Song [Fri, 15 Mar 2019 03:20:13 +0000 (03:20 +0000)]
[ELF] Fix 3 tests after D56828
arm-plt-reloc.s arm-thumb-plt-reloc.s: update offset calculations
pack-dyn-relocs-loop.s: this test is very sensitive to exact section
offsets and sizes. If we comment out the following two lines in
SyntheticSections.cpp, we should reproduce `ld.lld: error: thunk
creation not converged` caused by oscillation of the section size.
if (RelocData.size() < OldSize)
RelocData.append(OldSize - RelocData.size(), 0);
Use -z norelro to counteract the layout change (to be more specific,
we have to place .dynamic below .foo so that offset(foo) remains 0x10004)
llvm-svn: 356229
Aaron Puchert [Fri, 15 Mar 2019 02:30:07 +0000 (02:30 +0000)]
Add missing override specifier [NFC]
This should fix a -Winconsistent-missing-override warning that is only
visible when Z3 is enabled.
llvm-svn: 356228
Jorge Gorbe Moya [Fri, 15 Mar 2019 01:46:50 +0000 (01:46 +0000)]
[lldb-vscode] Fix dangling pointer in request_evaluate.
SBError::GetCString() returns a pointer to a string owned by the SBError
object. The code here was calling GetCString on a temporary and using
the returned pointer after the temporary was destroyed.
Differential Revision: https://reviews.llvm.org/D59400
llvm-svn: 356227
Fangrui Song [Fri, 15 Mar 2019 01:29:57 +0000 (01:29 +0000)]
[ELF] Split RW PT_LOAD on the PT_GNU_RELRO boundary
Summary:
Based on Peter Collingbourne's suggestion in D56828.
Before D56828: PT_LOAD(.data PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) .bss)
Old: PT_LOAD(PT_GNU_RELRO(.data.rel.ro .bss.rel.ro) .data .bss)
New: PT_LOAD(PT_GNU_RELRO(.data.rel.ro .bss.rel.ro)) PT_LOAD(.data. .bss)
The new layout reflects the runtime memory mappings.
By having two PT_LOAD segments, we can utilize the NOBITS part of the
first PT_LOAD and save bytes for .bss.rel.ro.
.bss.rel.ro is currently small and only used by copy relocations of
symbols in read-only segments, but it can be used for other purposes in
the future, e.g. if a relro section's statically relocated data is all
zeros, we can move it to .bss.rel.ro.
Reviewers: espindola, ruiu, pcc
Reviewed By: ruiu
Subscribers: nemanjai, jvesely, nhaehnle, javed.absar, kbarton, emaste, arichardson, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D58892
llvm-svn: 356226
Davide Italiano [Fri, 15 Mar 2019 00:45:57 +0000 (00:45 +0000)]
[DataFormatters] Remove LLDB_DISABLE_PYTHON from FormatManager.
And DataVisualization. One step closer.
llvm-svn: 356225
Marshall Clow [Fri, 15 Mar 2019 00:29:35 +0000 (00:29 +0000)]
Mark vector::operator[] and front/back as noexcept. We already do this for string and string_view. This should give better codegen inside of noexcept functions. Add tests for op[]/front/back/at, because apparently we had none.
llvm-svn: 356224
Artem Dergachev [Fri, 15 Mar 2019 00:26:17 +0000 (00:26 +0000)]
[analyzer] RetainCount: A function isn't a CFRetain if it takes no arguments.
Don't crash when a function has a name that starts with "CF" and ends with
"Retain" but takes 0 arguments. In particular, don't try to treat it as if
it returns its first argument.
These problems are inevitable because the checker is naming-convention-based,
but at least we shouldn't crash.
Differential Revision: https://reviews.llvm.org/D59123
llvm-svn: 356223
Artem Dergachev [Fri, 15 Mar 2019 00:22:59 +0000 (00:22 +0000)]
[analyzer] Support C++17 aggregates with bases without constructors.
RegionStore now knows how to bind a nonloc::CompoundVal that represents the
value of an aggregate initializer when it has its initial segment of sub-values
correspond to base classes.
Additionally, fixes the crash from pr40022.
Differential Revision: https://reviews.llvm.org/D59054
llvm-svn: 356222
Sam Clegg [Fri, 15 Mar 2019 00:20:13 +0000 (00:20 +0000)]
[WebAssembly] Remove unused load/store patterns that use texternalsym
Differential Revision: https://reviews.llvm.org/D59395
llvm-svn: 356221
Yan Zhang [Fri, 15 Mar 2019 00:17:41 +0000 (00:17 +0000)]
Fixed global constant/variable naming check on C++ class for ObjC++ files.
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59283
llvm-svn: 356220
Matt Arsenault [Thu, 14 Mar 2019 23:45:09 +0000 (23:45 +0000)]
AMDGPU: Remove intrinsic operand assert
Before r355981, this was under LLVM_DEBUG. I don't think the assert is
quite right, but this really should be a verifier check. Instcombine
should not be asserting on this sort of thing.
llvm-svn: 356219
Sanjay Patel [Thu, 14 Mar 2019 23:14:31 +0000 (23:14 +0000)]
[CGP] add another bailout for degenerate code (PR41064)
This is almost the same as:
rL355345
...and should prevent any potential crashing from examples like:
https://bugs.llvm.org/show_bug.cgi?id=41064
...although the bug was masked by:
rL355823
...and I'm not sure how to repro the problem after that change.
llvm-svn: 356218
Paul Robinson [Thu, 14 Mar 2019 23:09:17 +0000 (23:09 +0000)]
Tighten up tests that use -debugify as a shortcut. NFC
These now verify that a given instruction has a specific source
location, rather than any old location. We want to make sure we
propagate the correct locations from one instruction to another.
llvm-svn: 356217
Eli Friedman [Thu, 14 Mar 2019 23:08:19 +0000 (23:08 +0000)]
[MC] Sort FDEs by the associated CIE before emitting them.
This isn't necessary according to the DWARF standard, but it matches the
.eh_frame sections emitted by other tools in practice, and the Android
libunwindstack rejects .eh_frame sections where an FDE refers to a CIE
other than the closest previous CIE. So match the other tools and also
sort accordingly.
I consider this a bug in libunwindstack, but it's easy enough to emit
a compatible .eh_frame section for compatibility with installed
operating systems.
Differential Revision: https://reviews.llvm.org/D58266
llvm-svn: 356216