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

Thu Aug 21 09:22:40 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-with-lto-ubuntu` running on `as-worker-91` while building `llvm` at step 6 "build-stage1-compiler".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/49/builds/2076

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

```
Step 6 (build-stage1-compiler) failure: build (failure)
...
268.380 [4349/72/2232] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFELFObjectWriter.cpp.o
268.463 [4348/72/2233] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/SMEPeepholeOpt.cpp.o
268.465 [4347/72/2234] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64AsmPrinter.cpp.o
268.550 [4346/72/2235] Building CXX object lib/Target/ARM/Disassembler/CMakeFiles/LLVMARMDisassembler.dir/ARMDisassembler.cpp.o
268.582 [4345/72/2236] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFAsmBackend.cpp.o
268.996 [4344/72/2237] Building CXX object lib/Target/BPF/Disassembler/CMakeFiles/LLVMBPFDisassembler.dir/BPFDisassembler.cpp.o
269.002 [4343/72/2238] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFMCCodeEmitter.cpp.o
269.031 [4342/72/2239] Building CXX object lib/Target/AArch64/Utils/CMakeFiles/LLVMAArch64Utils.dir/AArch64SMEAttributes.cpp.o
269.048 [4341/72/2240] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFMCTargetDesc.cpp.o
269.113 [4340/72/2241] 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-91/clang-with-lto-ubuntu/build/stage1/lib/Target/AArch64 -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/lib/Target/AArch64 -I/home/buildbot/as-worker-91/clang-with-lto-ubuntu/build/stage1/include -I/home/buildbot/as-worker-91/clang-with-lto-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 -Wctad-maybe-unsupported -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-91/clang-with-lto-ubuntu/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp
/home/buildbot/as-worker-91/clang-with-lto-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/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/lib/Target/AArch64/MachineSMEABIPass.cpp:62:
/home/buildbot/as-worker-91/clang-with-lto-ubuntu/llvm-project/llvm/include/llvm/CodeGen/EdgeBundles.h:27: note: ‘EdgeBundles’ declared here as ‘class llvm::EdgeBundles’
   27 | class EdgeBundles {
      | 
269.278 [4340/71/2242] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFASpaceCastSimplifyPass.cpp.o
269.566 [4340/70/2243] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64LoadStoreOptimizer.cpp.o
269.658 [4340/69/2244] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64InstPrinter.cpp.o
270.828 [4340/68/2245] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFIRPeephole.cpp.o
270.899 [4340/67/2246] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64RegisterInfo.cpp.o
271.057 [4340/66/2247] Building CXX object lib/Target/BPF/AsmParser/CMakeFiles/LLVMBPFAsmParser.dir/BPFAsmParser.cpp.o
271.172 [4340/65/2248] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFMCInstLower.cpp.o
271.182 [4340/64/2249] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFCheckAndAdjustIR.cpp.o
271.605 [4340/63/2250] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFPreserveDIType.cpp.o
271.825 [4340/62/2251] Building CXX object lib/Target/ARM/MCTargetDesc/CMakeFiles/LLVMARMDesc.dir/ARMMCTargetDesc.cpp.o
271.942 [4340/61/2252] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFPreserveStaticOffset.cpp.o
272.001 [4340/60/2253] Building CXX object lib/Target/BPF/MCTargetDesc/CMakeFiles/LLVMBPFDesc.dir/BPFInstPrinter.cpp.o
273.362 [4340/59/2254] Building AMDGPUGenRegisterBank.inc...
273.380 [4340/58/2255] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonCFGOptimizer.cpp.o
273.404 [4340/57/2256] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCCodeEmitter.cpp.o
273.516 [4340/56/2257] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFFrameLowering.cpp.o
273.667 [4340/55/2258] Building CXX object lib/Target/ARM/AsmParser/CMakeFiles/LLVMARMAsmParser.dir/ARMAsmParser.cpp.o
273.818 [4340/54/2259] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64Subtarget.cpp.o
273.874 [4340/53/2260] Building CXX object lib/Target/ARM/MCTargetDesc/CMakeFiles/LLVMARMDesc.dir/ARMMCCodeEmitter.cpp.o
273.879 [4340/52/2261] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFInstrInfo.cpp.o
274.032 [4340/51/2262] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
274.697 [4340/50/2263] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64StackTagging.cpp.o
275.103 [4340/49/2264] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonGenExtract.cpp.o
275.174 [4340/48/2265] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonBranchRelaxation.cpp.o
275.719 [4340/47/2266] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFMISimplifyPatchable.cpp.o
275.776 [4340/46/2267] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFSelectionDAGInfo.cpp.o
275.862 [4340/45/2268] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFAsmPrinter.cpp.o
275.890 [4340/44/2269] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonBlockRanges.cpp.o
276.063 [4340/43/2270] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonAsmPrinter.cpp.o
276.435 [4340/42/2271] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/BitTracker.cpp.o

```

</details>

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