[llvm] [AArch64][SME] Implement the SME ABI (ZA state management) in Machine IR (PR #149062)

Tue Aug 19 02:32:10 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/23034

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
51.025 [4092/34/3172] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64FastISel.cpp.o
51.071 [4091/34/3173] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCAsmInfo.cpp.o
51.147 [4090/34/3174] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetObjectFile.cpp.o
51.289 [4089/34/3175] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64SIMDInstrOpt.cpp.o
51.611 [4088/34/3176] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64ELFStreamer.cpp.o
52.418 [4087/34/3177] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64WinCOFFObjectWriter.cpp.o
52.674 [4086/34/3178] Building CXX object lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64BaseInfo.cpp.o
52.687 [4085/34/3179] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MachObjectWriter.cpp.o
53.228 [4084/34/3180] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/SMEPeepholeOpt.cpp.o
53.308 [4083/34/3181] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o
FAILED: lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o 
/opt/ccache/bin/g++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/lib/Target/AArch64 -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-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-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 -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fvisibility=hidden  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o -MF lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o.d -o lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o -c /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:255: error: declaration of ‘llvm::EdgeBundles* {anonymous}::MachineSMEABI::EdgeBundles’ changes meaning of ‘EdgeBundles’ [-fpermissive]
  255 |   EdgeBundles *EdgeBundles = nullptr;
      | 
In file included from /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:62:
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/llvm/include/llvm/CodeGen/EdgeBundles.h:27: note: ‘EdgeBundles’ declared here as ‘class llvm::EdgeBundles’
   27 | class EdgeBundles {
      | 
53.524 [4083/33/3182] Building RISCVGenExegesis.inc...
53.556 [4083/32/3183] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64WinCOFFStreamer.cpp.o
53.734 [4083/31/3184] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64InstPrinter.cpp.o
53.846 [4083/30/3185] Building RISCVGenMCPseudoLowering.inc...
53.986 [4083/29/3186] Building SparcGenAsmMatcher.inc...
54.059 [4083/28/3187] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64RegisterInfo.cpp.o
54.149 [4083/27/3188] Building RISCVGenMCCodeEmitter.inc...
54.319 [4083/26/3189] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64TargetStreamer.cpp.o
54.339 [4083/25/3190] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64StackTagging.cpp.o
54.417 [4083/24/3191] Building RISCVGenMacroFusion.inc...
54.608 [4083/23/3192] Building RISCVGenO0PreLegalizeGICombiner.inc...
54.677 [4083/22/3193] Building CXX object lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64SMEAttributes.cpp.o
54.745 [4083/21/3194] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64Subtarget.cpp.o
54.801 [4083/20/3195] Building RISCVGenPostLegalizeGICombiner.inc...
54.849 [4083/19/3196] Building RISCVGenRegisterBank.inc...
54.880 [4083/18/3197] Building RISCVGenPreLegalizeGICombiner.inc...
55.063 [4083/17/3198] Building RISCVGenSDNodeInfo.inc...
55.270 [4083/16/3199] Building RISCVGenRegisterInfo.inc...
55.272 [4083/15/3200] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64InstrInfo.cpp.o
55.348 [4083/14/3201] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64InstructionSelector.cpp.o
56.561 [4083/13/3202] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelDAGToDAG.cpp.o
56.751 [4083/12/3203] Building RISCVGenSearchableTables.inc...
57.237 [4083/11/3204] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCCodeEmitter.cpp.o
57.496 [4083/10/3205] Building RISCVGenSubtargetInfo.inc...
57.774 [4083/9/3206] Building CXX object lib/Target/AArch64/Disassembler/CMakeFiles/LLVMAArch64Disassembler.dir/AArch64Disassembler.cpp.o
58.686 [4083/8/3207] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
58.742 [4083/7/3208] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetMachine.cpp.o
61.379 [4083/6/3209] Building RISCVGenInstrInfo.inc...
62.040 [4083/5/3210] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetTransformInfo.cpp.o
63.111 [4083/4/3211] Building RISCVGenGlobalISel.inc...

```

</details>

https://github.com/llvm/llvm-project/pull/149062