[llvm] [IR] Reject unhandled assume bundles and seperate them from normal attributes (PR #197007)

Wed Jun 10 00:00:47 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-sparc64-linux` running on `debian-stadler-sparc64` while building `llvm` at step 6 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/114/builds/810

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

```
Step 6 (build stage 1) failure: 'ninja' (failure)
...
[1070/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/FlattenCFG.cpp.o
[1071/4332] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/GlobalISelEmitter.cpp.o
[1072/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/BasicBlockUtils.cpp.o
[1073/4332] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/GlobalISelCombinerEmitter.cpp.o
[1074/4332] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/RegisterInfoEmitter.cpp.o
[1075/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/FixIrreducible.cpp.o
[1076/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/Evaluator.cpp.o
[1077/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/FunctionImportUtils.cpp.o
[1078/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/GuardUtils.cpp.o
[1079/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LibCallsShrinkWrap.cpp.o
FAILED: [code=1] lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LibCallsShrinkWrap.cpp.o 
/usr/bin/c++ -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/stage1/lib/Transforms/Utils -I/var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/lib/Transforms/Utils -I/var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/stage1/include -I/var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/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-dangling-reference -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-dangling-pointer -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 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LibCallsShrinkWrap.cpp.o -MF lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LibCallsShrinkWrap.cpp.o.d -o lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LibCallsShrinkWrap.cpp.o -c /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/lib/Transforms/Utils/LibCallsShrinkWrap.cpp
In function ‘int std::__convert_from_v(__locale_struct* const&, char*, int, const char*, ...)’:
cc1plus: error: expected unqualified-id before ‘=’ token
In file included from /usr/include/c++/15/bits/localefwd.h:42,
                 from /usr/include/c++/15/streambuf:44,
                 from /usr/include/c++/15/bits/streambuf_iterator.h:37,
                 from /usr/include/c++/15/iterator:68,
                 from /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/include/llvm/ADT/ADL.h:13,
                 from /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/include/llvm/ADT/DenseMap.h:24,
                 from /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/include/llvm/IR/PassManager.h:40,
                 from /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/include/llvm/Transforms/Utils/LibCallsShrinkWrap.h:14,
                 from /var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/lib/Transforms/Utils/LibCallsShrinkWrap.cpp:28:
/usr/include/sparc64-linux-gnu/c++/15/bits/c++locale.h:113:12: error: ‘__ret’ was not declared in this scope
  113 |     return __ret;
      |            ^~~~~
/var/lib/buildbot/workers/debian-stadler-sparc64/clang-sparc64-linux/llvm/llvm/include/llvm/IR/IRBuilder.h:143: confused by earlier errors, bailing out
[1080/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/FunctionComparator.cpp.o
[1081/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/CloneFunction.cpp.o
[1082/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/Instrumentation.cpp.o
[1083/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/InjectTLIMappings.cpp.o
[1084/4332] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/GlobalISel/MatchTable/Matchers.cpp.o
[1085/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/DebugSSAUpdater.cpp.o
[1086/4332] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/CodeGenSchedule.cpp.o
[1087/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/IntegerDivision.cpp.o
[1088/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LowerIFunc.cpp.o
[1089/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LowerAtomic.cpp.o
[1090/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/Debugify.cpp.o
[1091/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LowerInvoke.cpp.o
[1092/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/CodeExtractor.cpp.o
[1093/4332] Building CXX object lib/Analysis/CMakeFiles/LLVMAnalysis.dir/ValueTracking.cpp.o
[1094/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LowerGlobalDtors.cpp.o
[1095/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/IRNormalizer.cpp.o
[1096/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LCSSA.cpp.o
[1097/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LoopRotationUtils.cpp.o
[1098/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LoopConstrainer.cpp.o
[1099/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LoopSimplify.cpp.o
[1100/4332] Building CXX object utils/TableGen/Common/CMakeFiles/obj.LLVMTableGenCommon.dir/CodeGenDAGPatterns.cpp.o
[1101/4332] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/LoopPeel.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/197007