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

Tue Aug 19 02:55:03 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `publish-sphinx-docs` running on `as-worker-4` while building `llvm` at step 5 "build-docs-llvm-html-docs-clang-html-docs-clang...".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/45/builds/15555

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

```
Step 5 (build-docs-llvm-html-docs-clang-html-docs-clang...) failure: build (failure)
...
537.468 [3722/24/1779] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetObjectFile.cpp.o
537.567 [3721/24/1780] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/SMEPeepholeOpt.cpp.o
538.098 [3720/24/1781] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCExpr.cpp.o
538.377 [3719/24/1782] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64AsmBackend.cpp.o
538.681 [3718/24/1783] Building CXX object lib/Target/AArch64/TargetInfo/CMakeFiles/LLVMAArch64Info.dir/AArch64TargetInfo.cpp.o
538.738 [3717/24/1784] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64InstrInfo.cpp.o
538.948 [3716/24/1785] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64ELFStreamer.cpp.o
539.562 [3715/24/1786] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64WinCOFFObjectWriter.cpp.o
539.621 [3714/24/1787] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MachObjectWriter.cpp.o
539.820 [3713/24/1788] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o
FAILED: lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o 
/usr/bin/c++ -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbot/as-worker-4/publish-sphinx-docs/build/lib/Target/AArch64 -I/home/buildbot/as-worker-4/publish-sphinx-docs/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbot/as-worker-4/publish-sphinx-docs/build/include -I/home/buildbot/as-worker-4/publish-sphinx-docs/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 -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/as-worker-4/publish-sphinx-docs/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp
/home/buildbot/as-worker-4/publish-sphinx-docs/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/as-worker-4/publish-sphinx-docs/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:62:
/home/buildbot/as-worker-4/publish-sphinx-docs/llvm-project/llvm/include/llvm/CodeGen/EdgeBundles.h:27: note: ‘EdgeBundles’ declared here as ‘class llvm::EdgeBundles’
   27 | class EdgeBundles {
      | 
540.010 [3713/23/1789] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64StackTagging.cpp.o
541.383 [3713/22/1790] Building CXX object lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64BaseInfo.cpp.o
541.499 [3713/21/1791] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64TargetStreamer.cpp.o
542.025 [3713/20/1792] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64WinCOFFStreamer.cpp.o
542.347 [3713/19/1793] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64InstPrinter.cpp.o
542.714 [3713/18/1794] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMConstantPoolValue.cpp.o
542.925 [3713/17/1795] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64Subtarget.cpp.o
543.749 [3713/16/1796] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelDAGToDAG.cpp.o
544.237 [3713/15/1797] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCCodeEmitter.cpp.o
544.312 [3713/14/1798] Building CXX object lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64SMEAttributes.cpp.o
547.575 [3713/13/1799] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetMachine.cpp.o
550.760 [3713/12/1800] Building CXX object lib/Target/AArch64/Disassembler/CMakeFiles/LLVMAArch64Disassembler.dir/AArch64Disassembler.cpp.o
551.265 [3713/11/1801] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
551.332 [3713/10/1802] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMCallLowering.cpp.o
551.929 [3713/9/1803] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMCallingConv.cpp.o
552.765 [3713/8/1804] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMFixCortexA57AES1742098Pass.cpp.o
556.732 [3713/7/1805] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetTransformInfo.cpp.o
557.269 [3713/6/1806] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMConstantIslandPass.cpp.o
558.095 [3713/5/1807] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMExpandPseudoInsts.cpp.o
560.569 [3713/4/1808] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMFastISel.cpp.o
561.558 [3713/3/1809] Building CXX object lib/Target/AArch64/AsmParser/CMakeFiles/LLVMAArch64AsmParser.dir/AArch64AsmParser.cpp.o
568.249 [3713/2/1810] Building InstCombineTables.inc...
578.033 [3713/1/1811] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o
/home/buildbot/as-worker-4/publish-sphinx-docs/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp: In function ‘bool shouldLowerTailCallStackArg(const llvm::MachineFunction&, const llvm::CCValAssign&, llvm::SDValue, llvm::ISD::ArgFlagsTy, int)’:
/home/buildbot/as-worker-4/publish-sphinx-docs/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:8996: warning: comparison of integer expressions of different signedness: ‘uint64_t’ {aka ‘long unsigned int’} and ‘int64_t’ {aka ‘long int’} [-Wsign-compare]
 8996 |       if (SizeInBits / 8 != MFI.getObjectSize(FI))
      | 
ninja: build stopped: subcommand failed.

```

</details>

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