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

Tue Aug 19 02:49:59 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `llvm` at step 6 "build-stage1-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/15359

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

```
Step 6 (build-stage1-unified-tree) failure: build (failure)
...
87.409 [918/61/5675] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64O0PreLegalizerCombiner.cpp.o
87.531 [918/60/5676] Linking CXX shared module lib/CheckerOptionHandlingAnalyzerPlugin.so
87.532 [918/59/5677] Building AMDGPUGenDAGISel.inc...
87.673 [918/58/5678] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64SpeculationHardening.cpp.o
87.779 [918/57/5679] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64MachineScheduler.cpp.o
87.887 [918/56/5680] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CondBrTuning.cpp.o
88.007 [918/55/5681] Linking CXX executable unittests/Target/X86/X86Tests
88.078 [918/54/5682] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64MacroFusion.cpp.o
88.470 [918/53/5683] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o
88.471 [918/52/5684] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o
FAILED: lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/MachineSMEABIPass.cpp.o 
ccache /usr/lib64/ccache/c++ -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/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/lib/Target/AArch64 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/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-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fvisibility=hidden  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -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/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:255: error: declaration of ‘llvm::EdgeBundles* {anonymous}::MachineSMEABI::EdgeBundles’ [-fpermissive]
   EdgeBundles *EdgeBundles = nullptr;

In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:62:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/CodeGen/EdgeBundles.h:27: error: changes meaning of ‘EdgeBundles’ from ‘class llvm::EdgeBundles’ [-fpermissive]
 class EdgeBundles {

88.656 [918/51/5685] Building AMDGPUGenCallingConv.inc...
88.770 [918/50/5686] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CleanupLocalDynamicTLSPass.cpp.o
88.825 [918/49/5687] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CompressJumpTables.cpp.o
89.021 [918/48/5688] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64StackTaggingPreRA.cpp.o
89.068 [918/47/5689] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64LegalizerInfo.cpp.o
89.328 [918/46/5690] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
89.332 [918/45/5691] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64SelectionDAGInfo.cpp.o
89.602 [918/44/5692] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64PostCoalescerPass.cpp.o
89.621 [918/43/5693] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AddressingModes.cpp.o
89.637 [918/42/5694] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64PostLegalizerLowering.cpp.o
89.973 [918/41/5695] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64TargetObjectFile.cpp.o
89.998 [918/40/5696] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64BranchTargets.cpp.o
90.005 [918/39/5697] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/SMEPeepholeOpt.cpp.o
90.132 [918/38/5698] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64MachineFunctionInfo.cpp.o
90.184 [918/37/5699] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/Immediates.cpp.o
90.224 [918/36/5700] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64SLSHardening.cpp.o
90.227 [918/35/5701] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64AsmPrinter.cpp.o
90.274 [918/34/5702] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CallingConvention.cpp.o
90.292 [918/33/5703] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64LowerHomogeneousPrologEpilog.cpp.o
91.054 [918/32/5704] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64PointerAuth.cpp.o
91.159 [918/31/5705] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64MCInstLower.cpp.o
91.168 [918/30/5706] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64RegisterInfoTest.cpp.o
91.218 [918/29/5707] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64PreLegalizerCombiner.cpp.o
91.401 [918/28/5708] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64FalkorHWPFFix.cpp.o
91.456 [918/27/5709] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64PostLegalizerCombiner.cpp.o
91.487 [918/26/5710] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ExpandPseudoInsts.cpp.o
91.631 [918/25/5711] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/MatrixRegisterAliasing.cpp.o
92.080 [918/24/5712] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CollectLOH.cpp.o
92.244 [918/23/5713] Building CXX object tools/llvm-exegesis/lib/AArch64/CMakeFiles/LLVMExegesisAArch64.dir/Target.cpp.o
93.126 [918/22/5714] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SVESchedPseudoTest.cpp.o

```

</details>

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