abrachet added a comment.

I believe this patch might be the cause of some assertion failures we are 
seeing in a two stage lto build, as it's only happening for arm64-darwin. See 
https://ci.chromium.org/ui/p/fuchsia/builders/prod/clang-mac-xarm64/b8798097341668696785/overview
 and it's corresponding build logs 
https://logs.chromium.org/logs/fuchsia/buildbucket/cr-buildbucket/8798097341668696785/+/u/clang/build/stdout

  [4060/4274](20) Linking CXX executable bin/clang-refactor
  FAILED: bin/clang-refactor 
  : && /opt/s/w/ir/x/w/staging/llvm_build/./bin/clang++ 
--target=arm64-apple-darwin 
--sysroot=/opt/s/w/ir/cache/macos_sdk/XCode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
 -stdlib=libc++ -fvisibility-inlines-hidden -Werror=date-time 
-Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter 
-Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic 
-Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough 
-Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor 
-Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion 
-Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -flto 
-ffile-prefix-map=/opt/s/w/ir/x/w/staging/llvm_build/tools/clang/stage2-bins=../staging/llvm_build/tools/clang/stage2-bins
 -ffile-prefix-map=/opt/s/w/ir/x/w/llvm-llvm-project/= -no-canonical-prefixes 
-fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -isysroot 
/opt/s/w/ir/cache/macos_sdk/XCode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
 -mmacosx-version-min=10.13 -Wl,-headerpad_max_install_names -nostdlib++ 
/opt/s/w/ir/x/w/staging/llvm_build/lib/libc++.a -stdlib=libc++ 
-static-libstdc++ -fno-pie -fuse-ld=lld -Wl,--color-diagnostics -flto 
-Wl,-lto_library -Wl,/opt/s/w/ir/x/w/staging/llvm_build/./lib/libLTO.dylib    
-Wl,-dead_strip 
tools/clang/tools/clang-refactor/CMakeFiles/clang-refactor.dir/ClangRefactor.cpp.o
 
tools/clang/tools/clang-refactor/CMakeFiles/clang-refactor.dir/TestSupport.cpp.o
 -o bin/clang-refactor  -Wl,-rpath,@loader_path/../lib  lib/libLLVMOption.a  
lib/libLLVMSupport.a  lib/libclangAST.a  lib/libclangBasic.a  
lib/libclangFormat.a  lib/libclangFrontend.a  lib/libclangLex.a  
lib/libclangRewrite.a  lib/libclangSerialization.a  lib/libclangTooling.a  
lib/libclangToolingCore.a  lib/libclangToolingRefactoring.a  
lib/libclangIndex.a  lib/libclangFormat.a  lib/libclangToolingInclusions.a  
lib/libclangFrontend.a  lib/libclangDriver.a  lib/libLLVMWindowsDriver.a  
lib/libLLVMOption.a  lib/libclangParse.a  lib/libclangSerialization.a  
lib/libclangSema.a  lib/libclangEdit.a  lib/libclangAnalysis.a  
lib/libclangASTMatchers.a  lib/libclangAST.a  lib/libLLVMFrontendOpenMP.a  
lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  
lib/libLLVMInstCombine.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  
lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoPDB.a  
lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMObject.a  
lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  
lib/libLLVMIRReader.a  lib/libLLVMAsmParser.a  lib/libLLVMTextAPI.a  
lib/libclangSupport.a  lib/libLLVMFrontendHLSL.a  lib/libLLVMBitReader.a  
lib/libclangToolingCore.a  lib/libclangRewrite.a  lib/libclangLex.a  
lib/libclangBasic.a  lib/libLLVMCore.a  lib/libLLVMBinaryFormat.a  
lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMSupport.a  -lm  
/opt/s/w/ir/x/w/staging/zlib_install/lib/libz.a  
/opt/s/w/ir/x/w/staging/zstd_install_prefix/lib/libzstd.a  
lib/libLLVMDemangle.a && :
  clang++: warning: argument unused during compilation: '-static-libstdc++' 
[-Wunused-command-line-argument]
  Assertion failed: (BitWidth == RHS.BitWidth && "Bit widths must be the 
same"), function operator+=, file 
/opt/s/w/ir/x/w/llvm-llvm-project/llvm/lib/Support/APInt.cpp, line 189.
  PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ 
and include the crash backtrace.
  Stack dump:
  0.    Program arguments: /opt/s/w/ir/x/w/staging/llvm_build/./bin/ld64.lld 
-demangle -dynamic -arch arm64 -platform_version macos 11.0.0 11.0 -no_pie 
-mllvm -global-isel -mllvm -global-isel-abort=0 -syslibroot 
/opt/s/w/ir/cache/macos_sdk/XCode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
 -o bin/clang-refactor -headerpad_max_install_names 
/opt/s/w/ir/x/w/staging/llvm_build/lib/libc++.a --color-diagnostics 
-lto_library /opt/s/w/ir/x/w/staging/llvm_build/./lib/libLTO.dylib -dead_strip 
tools/clang/tools/clang-refactor/CMakeFiles/clang-refactor.dir/ClangRefactor.cpp.o
 
tools/clang/tools/clang-refactor/CMakeFiles/clang-refactor.dir/TestSupport.cpp.o
 -rpath @loader_path/../lib lib/libLLVMOption.a lib/libLLVMSupport.a 
lib/libclangAST.a lib/libclangBasic.a lib/libclangFormat.a 
lib/libclangFrontend.a lib/libclangLex.a lib/libclangRewrite.a 
lib/libclangSerialization.a lib/libclangTooling.a lib/libclangToolingCore.a 
lib/libclangToolingRefactoring.a lib/libclangIndex.a lib/libclangFormat.a 
lib/libclangToolingInclusions.a lib/libclangFrontend.a lib/libclangDriver.a 
lib/libLLVMWindowsDriver.a lib/libLLVMOption.a lib/libclangParse.a 
lib/libclangSerialization.a lib/libclangSema.a lib/libclangEdit.a 
lib/libclangAnalysis.a lib/libclangASTMatchers.a lib/libclangAST.a 
lib/libLLVMFrontendOpenMP.a lib/libLLVMScalarOpts.a 
lib/libLLVMAggressiveInstCombine.a lib/libLLVMInstCombine.a 
lib/libLLVMTransformUtils.a lib/libLLVMAnalysis.a lib/libLLVMProfileData.a 
lib/libLLVMSymbolize.a lib/libLLVMDebugInfoPDB.a lib/libLLVMDebugInfoMSF.a 
lib/libLLVMDebugInfoDWARF.a lib/libLLVMObject.a lib/libLLVMMCParser.a 
lib/libLLVMMC.a lib/libLLVMDebugInfoCodeView.a lib/libLLVMIRReader.a 
lib/libLLVMAsmParser.a lib/libLLVMTextAPI.a lib/libclangSupport.a 
lib/libLLVMFrontendHLSL.a lib/libLLVMBitReader.a lib/libclangToolingCore.a 
lib/libclangRewrite.a lib/libclangLex.a lib/libclangBasic.a lib/libLLVMCore.a 
lib/libLLVMBinaryFormat.a lib/libLLVMRemarks.a lib/libLLVMBitstreamReader.a 
lib/libLLVMSupport.a -lm /opt/s/w/ir/x/w/staging/zlib_install/lib/libz.a 
/opt/s/w/ir/x/w/staging/zstd_install_prefix/lib/libzstd.a lib/libLLVMDemangle.a 
-lSystem 
/opt/s/w/ir/x/w/staging/llvm_build/./lib/clang/16.0.0/lib/darwin/libclang_rt.osx.a
  1.    Running pass 'Function Pass Manager' on module 'ld-temp.o'.
  2.    Running pass 'AArch64PreLegalizerCombiner' on function 
'@_ZN5clang4Sema21CheckTemplateArgumentEPNS_9NamedDeclERNS_19TemplateArgumentLocES2_NS_14SourceLocationES5_jRN4llvm15SmallVectorImplINS_16TemplateArgumentEEESA_NS0_25CheckTemplateArgumentKindE'
  Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH 
or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
  0  ld64.lld                 0x000000010a3c929e 
llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 46
  1  ld64.lld                 0x000000010a3c80e8 llvm::sys::RunSignalHandlers() 
+ 248
  2  ld64.lld                 0x000000010a3c98ee SignalHandler(int) + 270
  3  libsystem_platform.dylib 0x00007fff208d2d7d _sigtramp + 29
  4  libsystem_platform.dylib 000000000000000000 _sigtramp + 
18446603339970040480
  5  libsystem_c.dylib        0x00007fff207e2406 abort + 125
  6  libsystem_c.dylib        0x00007fff207e17d8 err + 0
  7  ld64.lld                 0x000000010a33d9ff 
llvm::APInt::operator+=(llvm::APInt const&) + 223
  8  ld64.lld                 0x000000010b23cc5f void 
std::__2::__function::__policy_invoker<void 
(llvm::MachineIRBuilder&)>::__call_impl<std::__2::__function::__default_alloc_func<llvm::CombinerHelper::matchReassocFoldConstantsInSubTree(llvm::GPtrAdd&,
 llvm::MachineInstr*, llvm::MachineInstr*, std::__2::function<void 
(llvm::MachineIRBuilder&)>&)::$_0, void 
(llvm::MachineIRBuilder&)>>(std::__2::__function::__policy_storage const*, 
llvm::MachineIRBuilder&) + 143
  9  ld64.lld                 0x000000010af99e50 (anonymous 
namespace)::AArch64GenPreLegalizerCombinerHelper::tryCombineAll(llvm::GISelChangeObserver&,
 llvm::MachineInstr&, llvm::MachineIRBuilder&) const + 9952
  10 ld64.lld                 0x000000010af95030 (anonymous 
namespace)::AArch64PreLegalizerCombinerInfo::combine(llvm::GISelChangeObserver&,
 llvm::MachineInstr&, llvm::MachineIRBuilder&) const + 144
  11 ld64.lld                 0x000000010b214107 
llvm::Combiner::combineMachineInstrs(llvm::MachineFunction&, 
llvm::GISelCSEInfo*) + 3015
  12 ld64.lld                 0x000000010af94a7d (anonymous 
namespace)::AArch64PreLegalizerCombiner::runOnMachineFunction(llvm::MachineFunction&)
 + 781
  13 ld64.lld                 0x000000010b6ef714 
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 660
  14 ld64.lld                 0x000000010d18ffd2 
llvm::FPPassManager::runOnFunction(llvm::Function&) + 1618
  15 ld64.lld                 0x000000010d198624 
llvm::FPPassManager::runOnModule(llvm::Module&) + 68
  16 ld64.lld                 0x000000010d190a7c 
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 1964
  17 ld64.lld                 0x000000010b5cc32f codegen(llvm::lto::Config 
const&, llvm::TargetMachine*, 
std::__2::function<llvm::Expected<std::__2::unique_ptr<llvm::CachedFileStream, 
std::__2::default_delete<llvm::CachedFileStream>>> (unsigned int)>, unsigned 
int, llvm::Module&, llvm::ModuleSummaryIndex const&) + 1727
  18 ld64.lld                 0x000000010b5cb43c 
llvm::lto::backend(llvm::lto::Config const&, 
std::__2::function<llvm::Expected<std::__2::unique_ptr<llvm::CachedFileStream, 
std::__2::default_delete<llvm::CachedFileStream>>> (unsigned int)>, unsigned 
int, llvm::Module&, llvm::ModuleSummaryIndex&) + 364
  19 ld64.lld                 0x000000010b5bd8b4 
llvm::lto::LTO::runRegularLTO(std::__2::function<llvm::Expected<std::__2::unique_ptr<llvm::CachedFileStream,
 std::__2::default_delete<llvm::CachedFileStream>>> (unsigned int)>) + 2068
  20 ld64.lld                 0x000000010b5bccf2 
llvm::lto::LTO::run(std::__2::function<llvm::Expected<std::__2::unique_ptr<llvm::CachedFileStream,
 std::__2::default_delete<llvm::CachedFileStream>>> (unsigned int)>, 
std::__2::function<llvm::Expected<std::__2::function<llvm::Expected<std::__2::unique_ptr<llvm::CachedFileStream,
 std::__2::default_delete<llvm::CachedFileStream>>> (unsigned int)>> (unsigned 
int, llvm::StringRef)>) + 1122
  21 ld64.lld                 0x000000010a6fcade 
lld::macho::BitcodeCompiler::compile() + 830
  22 ld64.lld                 0x000000010a6cc840 
lld::macho::link(llvm::ArrayRef<char const*>, llvm::raw_ostream&, 
llvm::raw_ostream&, bool, bool) + 35856
  23 ld64.lld                 0x000000010a30d6b0 lldMain(int, char const**, 
llvm::raw_ostream&, llvm::raw_ostream&, bool) + 1872
  24 ld64.lld                 0x000000010a30cdad lld_main(int, char**) + 285
  25 libdyld.dylib            0x00007fff208a8f3d start + 1
  clang++: error: unable to execute command: Abort trap: 6
  clang++: error: linker command failed due to signal (use -v to see invocation)
  [4061/4274](19) Linking CXX executable bin/llvm-lipo


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137269/new/

https://reviews.llvm.org/D137269

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