https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114403
Bug ID: 114403
Summary: [14 regression]
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Created attachment 57743
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57743&action=edit
build-llvm.sh
I get the following test failures for LLVM 17.0.6:
```
********************
Failed Tests (17):
LLVM :: CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
LLVM :: CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.d.ll
LLVM ::
CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.g16.a16.ll
LLVM :: CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.g16.ll
LLVM :: CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.sample.cd.g16.ll
LLVM :: CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.sample.g16.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.nsa.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.a16.dim.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.cd.a16.dim.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.cd.g16.encode.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.cd.g16.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.dim.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.a16.dim.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.encode.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.g16.ll
LLVM :: CodeGen/AMDGPU/llvm.amdgcn.image.sample.o.dim.ll
LLVM :: CodeGen/NVPTX/wmma.py
```
I can reproduce it with -O3 -march=znver -fno-vect-cost-model. It also then
shows up if Clang is used to build Firefox. I will do the usual narrowing down
but my success rate for producing test cases from LLVM is poor ;)
Picking the first one:
```
FAIL: LLVM ::
CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll (5582 of
50819)
******************** TEST 'LLVM ::
CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll' FAILED
********************
Script:
--
: 'RUN: at line 2';
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o
-
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
|
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/FileCheck
-check-prefix=GFX9
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
: 'RUN: at line 3';
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx1010 -stop-after=legalizer -o
-
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
|
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/FileCheck
-check-prefix=GFX10
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
: 'RUN: at line 4';
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx1100 -stop-after=legalizer -o
-
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
|
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/FileCheck
-check-prefix=GFX11
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
--
Exit Code: 2
Command Output (stderr):
--
+ : 'RUN: at line 2'
+
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o
-
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
+
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/FileCheck
-check-prefix=GFX9
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and
include the crash backtrace.
Stack dump:
0. Program arguments:
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o
-
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
1. Running pass 'Function Pass Manager' on module
'/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll'.
2. Running pass 'Early CSE' on function '@sample_d_3d'
#0 0x00007f3bd08e5fbf llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/../lib64/libLLVM-17.so+0xee5fbf)
#1 0x00007f3bd08e315b SignalHandler(int) Signals.cpp:0:0
#2 0x00007f3bcf46ac10 (/usr/lib64/libc.so.6+0x3bc10)
#3 0x00007f3bd0a6c5a6 llvm::Instruction::isIdenticalTo(llvm::Instruction
const*) const
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/../lib64/libLLVM-17.so+0x106c5a6)
#4 0x00007f3bd1ed8073 bool llvm::DenseMapBase<llvm::DenseMap<(anonymous
namespace)::CallValue, llvm::ScopedHashTableVal<(anonymous
namespace)::CallValue, std::pair<llvm::Instruction*, unsigned int>>*,
llvm::DenseMapInfo<(anonymous namespace)::CallValue, void>,
llvm::detail::DenseMapPair<(anonymous namespace)::CallValue,
llvm::ScopedHashTableVal<(anonymous namespace)::CallValue,
std::pair<llvm::Instruction*, unsigned int>>*>>, (anonymous
namespace)::CallValue, llvm::ScopedHashTableVal<(anonymous
namespace)::CallValue, std::pair<llvm::Instruction*, unsigned int>>*,
llvm::DenseMapInfo<(anonymous namespace)::CallValue, void>,
llvm::detail::DenseMapPair<(anonymous namespace)::CallValue,
llvm::ScopedHashTableVal<(anonymous namespace)::CallValue,
std::pair<llvm::Instruction*, unsigned int>>*>>::LookupBucketFor<(anonymous
namespace)::CallValue>((anonymous namespace)::CallValue const&,
llvm::detail::DenseMapPair<(anonymous namespace)::CallValue,
llvm::ScopedHashTableVal<(anonymous namespace)::CallValue,
std::pair<llvm::Instruction*, unsigned int>>*> const*&) const EarlyCSE.cpp:0:0
#5 0x00007f3bd1eddbe7 (anonymous namespace)::EarlyCSE::run() EarlyCSE.cpp:0:0
#6 0x00007f3bd1ee0da2 (anonymous
namespace)::EarlyCSELegacyCommonPass<false>::runOnFunction(llvm::Function&)
EarlyCSE.cpp:0:0
#7 0x00007f3bd0aac88e llvm::FPPassManager::runOnFunction(llvm::Function&)
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/../lib64/libLLVM-17.so+0x10ac88e)
#8 0x00007f3bd0aacd9c llvm::FPPassManager::runOnModule(llvm::Module&)
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/../lib64/libLLVM-17.so+0x10acd9c)
#9 0x00007f3bd0aad478 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/../lib64/libLLVM-17.so+0x10ad478)
#10 0x000055ce81b49356 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#11 0x000055ce81b3ead3 main
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc+0x11ad3)
#12 0x00007f3bcf454e58 (/usr/lib64/libc.so.6+0x25e58)
#13 0x00007f3bcf454f15 __libc_start_main (/usr/lib64/libc.so.6+0x25f15)
#14 0x000055ce81b3efb1 _start
(/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/llc+0x11fb1)
FileCheck error: '<stdin>' is empty.
FileCheck command line:
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm_build-abi_x86_64.amd64/bin/FileCheck
-check-prefix=GFX9
/var/tmp/portage/sys-devel/llvm-17.0.6/work/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
```
Simpler reproducer is then: ~/git/llvm-project $
~/data/build/llvm-project-test/bin/llvm-lit
./llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
-v.
And then: `/build/llvm-project-test/bin/llc -global-isel
-mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o -
/home/sam/git/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll`.
