[llvm] [Analysis] Ensure use of strict fp exceptions in ConstantFolding (PR #136139)

Mon May 5 17:59:00 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx-nvidia-ubuntu` running on `as-builder-7` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/180/builds/16995

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:235:33:   required from ‘bool llvm::VPlanPatternMatch::Recipe_match<Ops_t, Opcode, Commutative, RecipeTys>::match(const llvm::VPRecipeBase*) const [with Ops_t = std::tuple<>; unsigned int Opcode = 0; bool Commutative = false; RecipeTys = {llvm::VPCanonicalIVPHIRecipe}]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:213:25:   required from ‘bool llvm::VPlanPatternMatch::Recipe_match<Ops_t, Opcode, Commutative, RecipeTys>::match(const llvm::VPValue*) const [with Ops_t = std::tuple<>; unsigned int Opcode = 0; bool Commutative = false; RecipeTys = {llvm::VPCanonicalIVPHIRecipe}]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:230:45:   required from ‘llvm::VPlanPatternMatch::Recipe_match<std::tuple<llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, llvm::VPlanPatternMatch::int_pred_ty<llvm::VPlanPatternMatch::is_specific_int, 0> >, 0, false, llvm::VPScalarIVStepsRecipe>::match(const llvm::VPRecipeBase*) const::<lambda(auto:32, unsigned int)> [with auto:32 = llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:259:14:   required from ‘bool llvm::VPlanPatternMatch::Recipe_match<Ops_t, Opcode, Commutative, RecipeTys>::all_of_tuple_elements(std::index_sequence<Idx ...>, Fn) const [with Fn = llvm::VPlanPatternMatch::Recipe_match<std::tuple<llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, llvm::VPlanPatternMatch::int_pred_ty<llvm::VPlanPatternMatch::is_specific_int, 0> >, 0, false, llvm::VPScalarIVStepsRecipe>::match(const llvm::VPRecipeBase*) const::<lambda(auto:32, unsigned int)>; long unsigned int ...Is = {0, 1}; Ops_t = std::tuple<llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, llvm::VPlanPatternMatch::int_pred_ty<llvm::VPlanPatternMatch::is_specific_int, 0> >; unsigned int Opcode = 0; bool Commutative = false; RecipeTys = {llvm::VPScalarIVStepsRecipe}; std::index_sequence<Idx ...> = std::integer_sequence<long unsigned int, 0, 1>]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:229:30:   required from ‘bool llvm::VPlanPatternMatch::Recipe_match<Ops_t, Opcode, Commutative, RecipeTys>::match(const llvm::VPRecipeBase*) const [with Ops_t = std::tuple<llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, llvm::VPlanPatternMatch::int_pred_ty<llvm::VPlanPatternMatch::is_specific_int, 0> >; unsigned int Opcode = 0; bool Commutative = false; RecipeTys = {llvm::VPScalarIVStepsRecipe}]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:213:25:   required from ‘bool llvm::VPlanPatternMatch::Recipe_match<Ops_t, Opcode, Commutative, RecipeTys>::match(const llvm::VPValue*) const [with Ops_t = std::tuple<llvm::VPlanPatternMatch::Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, llvm::VPlanPatternMatch::int_pred_ty<llvm::VPlanPatternMatch::is_specific_int, 0> >; unsigned int Opcode = 0; bool Commutative = false; RecipeTys = {llvm::VPScalarIVStepsRecipe}]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:29:17:   required from ‘bool llvm::VPlanPatternMatch::match(Val*, const Pattern&) [with Val = llvm::VPValue; Pattern = Recipe_match<std::tuple<Recipe_match<std::tuple<>, 0, false, llvm::VPCanonicalIVPHIRecipe>, int_pred_ty<is_specific_int, 0> >, 0, false, llvm::VPScalarIVStepsRecipe>]’
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanUtils.cpp:65:18:   required from here
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h:258:61: warning: parameter ‘P’ set but not used [-Wunused-but-set-parameter]
36.259 [1110/128/1491] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o
FAILED: lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DHAS_LOGF128 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/lib/Analysis -I/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Analysis -I/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/include -I/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -ffp-exception-behavior=strict -MD -MT lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o -MF lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o.d -o lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ConstantFolding.cpp.o -c /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/Analysis/ConstantFolding.cpp
c++: error: unrecognized command-line option ‘-ffp-exception-behavior=strict’
36.261 [1110/127/1492] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTOBackend.cpp.o
In file included from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/LTO.h:32,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/LTOBackend.h:22,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/LTO/LTOBackend.cpp:16:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy()’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:273:33: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  273 |     ImportListsTy() : EmptyList(ImportIDs) {}
      |                                 ^~~~~~~~~
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy(size_t)’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:274:44: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  274 |     ImportListsTy(size_t Size) : EmptyList(ImportIDs), ListsImpl(Size) {}
      |                                            ^~~~~~~~~
36.262 [1110/126/1493] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTOModule.cpp.o
In file included from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/LTO.h:32,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/legacy/LTOModule.h:20,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/LTO/LTOModule.cpp:14:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy()’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:273:33: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  273 |     ImportListsTy() : EmptyList(ImportIDs) {}
      |                                 ^~~~~~~~~
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy(size_t)’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:274:44: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  274 |     ImportListsTy(size_t Size) : EmptyList(ImportIDs), ListsImpl(Size) {}
      |                                            ^~~~~~~~~
36.263 [1110/125/1494] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTOCodeGenerator.cpp.o
In file included from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/LTO.h:32,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h:45,
                 from /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/lib/LTO/LTOCodeGenerator.cpp:14:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy()’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:273:33: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  273 |     ImportListsTy() : EmptyList(ImportIDs) {}
      |                                 ^~~~~~~~~
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h: In constructor ‘llvm::FunctionImporter::ImportListsTy::ImportListsTy(size_t)’:
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/include/llvm/Transforms/IPO/FunctionImport.h:274:44: warning: member ‘llvm::FunctionImporter::ImportListsTy::ImportIDs’ is used uninitialized [-Wuninitialized]
  274 |     ImportListsTy(size_t Size) : EmptyList(ImportIDs), ListsImpl(Size) {}
      |                                            ^~~~~~~~~

```

</details>

https://github.com/llvm/llvm-project/pull/136139