fhahn wrote:
It looks like there's still a failure related to this patch on current main
AFAICT (MSAN finds a use of uninitialized value):
https://lab.llvm.org/buildbot/#/builders/169/builds/852/steps/12/logs/stdio
```
FAIL: Clang :: CodeGen/arm-branch-protection-attr-1.c (3 of 83868)
******************** TEST 'Clang :: CodeGen/arm-branch-protection-attr-1.c'
FAILED ********************
Exit Code: 2
Command Output (stderr):
--
RUN: at line 2: /b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/clang
-cc1 -internal-isystem
/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/lib/clang/19/include
-nostdsysteminc -triple thumbv7m-unknown-unknown-eabi -emit-llvm
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/test/CodeGen/arm-branch-protection-attr-1.c
-o - |
/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/test/CodeGen/arm-branch-protection-attr-1.c
--check-prefix=CHECK
+ /b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/clang -cc1
-internal-isystem
/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/lib/clang/19/include
-nostdsysteminc -triple thumbv7m-unknown-unknown-eabi -emit-llvm
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/test/CodeGen/arm-branch-protection-attr-1.c
-o -
+ /b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/FileCheck
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/test/CodeGen/arm-branch-protection-attr-1.c
--check-prefix=CHECK
==227510==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55555f411b60 in
clang::TargetInfo::BranchProtectionInfo::setFnAttributes(llvm::AttrBuilder&)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/include/clang/Basic/TargetInfo.h:1468:11
#1 0x55555f411931 in
clang::TargetInfo::BranchProtectionInfo::setFnAttributes(llvm::Function&)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/include/clang/Basic/TargetInfo.h:1455:7
#2 0x55555f418b20 in (anonymous
namespace)::ARMTargetCodeGenInfo::setTargetAttributes(clang::Decl const*,
llvm::GlobalValue*, clang::CodeGen::CodeGenModule&) const
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/Targets/ARM.cpp:155:15
#3 0x55555e980b31 in
clang::CodeGen::CodeGenModule::setNonAliasAttributes(clang::GlobalDecl,
llvm::GlobalObject*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:2727:26
#4 0x55555e98fe97 in
clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl,
llvm::GlobalValue*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:5980:3
#5 0x55555e9853f4 in
clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl,
llvm::GlobalValue*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:4141:12
#6 0x55555e98bfb3 in
clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:3852:5
#7 0x55555e982db1 in
clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:6863:5
#8 0x55555f1ef187 in (anonymous
namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/ModuleBuilder.cpp:190:18
#9 0x55555f1e1510 in
clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:199:8
#10 0x5555616c3460 in clang::ParseAST(clang::Sema&, bool, bool)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Parse/ParseAST.cpp:167:31
#11 0x55555f6dd91b in clang::FrontendAction::Execute()
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1078:8
#12 0x55555f628f29 in
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1061:33
#13 0x55555f7e7b3d in
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:280:25
#14 0x55555b0a2b10 in cc1_main(llvm::ArrayRef<char const*>, char const*,
void*)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/tools/driver/cc1_main.cpp:276:15
#15 0x55555b09d0bf in ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&,
llvm::ToolContext const&)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/tools/driver/driver.cpp:215:12
#16 0x55555b09ad69 in clang_main(int, char**, llvm::ToolContext const&)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/tools/driver/driver.cpp:256:12
#17 0x55555b0b8018 in main
/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/tools/clang/tools/driver/clang-driver.cpp:17:10
#18 0x7ffff7a2814f (/lib/x86_64-linux-gnu/libc.so.6+0x2814f) (BuildId:
502d55a5e424889ddb2846eb6dbeddaedd75b323)
#19 0x7ffff7a28208 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x28208) (BuildId:
502d55a5e424889ddb2846eb6dbeddaedd75b323)
#20 0x55555b001f64 in _start
(/b/sanitizer-x86_64-linux-fast/build/llvm_build_msan/bin/clang-19+0x5aadf64)
```
https://github.com/llvm/llvm-project/pull/82819
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