[llvm] [gn build] Port ff494c648aec (PR #215956)

Wed Aug 12 23:36:59 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-rel-x86-64` running on `ml-opt-rel-x86-64-b1` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/185/builds/877

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
552.343 [800/64/3318] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCTLSDynamicCall.cpp.o
552.797 [799/64/3319] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCMCInstLower.cpp.o
553.412 [798/64/3320] Building CXX object lib/Target/Mips/CMakeFiles/LLVMMipsCodeGen.dir/MipsInstructionSelector.cpp.o
553.510 [797/64/3321] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCGenScalarMASSEntries.cpp.o
553.623 [796/64/3322] Building CXX object lib/Target/Mips/CMakeFiles/LLVMMipsCodeGen.dir/MipsPostLegalizerCombiner.cpp.o
553.679 [795/64/3323] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCSubtarget.cpp.o
553.898 [794/64/3324] Building CXX object lib/Target/BPF/CMakeFiles/LLVMBPFCodeGen.dir/BPFCodeGenPassBuilder.cpp.o
554.551 [793/64/3325] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCVSXFMAMutate.cpp.o
554.588 [792/64/3326] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCReduceCRLogicals.cpp.o
554.726 [791/64/3327] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPromoteConstant.cpp.o
FAILED: [code=1] lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPromoteConstant.cpp.o 
ccache /usr/bin/c++ -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/b/ml-opt-rel-x86-64-b1/build/lib/Target/RISCV -I/b/ml-opt-rel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV -I/var/lib/buildbot/.local/lib/python3.7/site-packages/tensorflow/include -I/b/ml-opt-rel-x86-64-b1/build/include -I/b/ml-opt-rel-x86-64-b1/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -fvisibility=hidden -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -std=c++17 -Winvalid-pch -Xclang -include-pch -Xclang /b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch -Xclang -include -Xclang /b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx -MD -MT lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPromoteConstant.cpp.o -MF lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPromoteConstant.cpp.o.d -o lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPromoteConstant.cpp.o -c /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVPromoteConstant.cpp
error: PCH file '/b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch' built from a different branch ((++20260714014842+ca7933e47d3a-1~exp1~20260714134950.86)) than the compiler ((1~deb12u1))
1 error generated.
554.730 [791/63/3328] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPushPopOptimizer.cpp.o
FAILED: [code=1] lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPushPopOptimizer.cpp.o 
ccache /usr/bin/c++ -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/b/ml-opt-rel-x86-64-b1/build/lib/Target/RISCV -I/b/ml-opt-rel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV -I/var/lib/buildbot/.local/lib/python3.7/site-packages/tensorflow/include -I/b/ml-opt-rel-x86-64-b1/build/include -I/b/ml-opt-rel-x86-64-b1/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -fvisibility=hidden -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -std=c++17 -Winvalid-pch -Xclang -include-pch -Xclang /b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch -Xclang -include -Xclang /b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx -MD -MT lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPushPopOptimizer.cpp.o -MF lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPushPopOptimizer.cpp.o.d -o lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPushPopOptimizer.cpp.o -c /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVPushPopOptimizer.cpp
error: PCH file '/b/ml-opt-rel-x86-64-b1/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch' built from a different branch ((++20260714014842+ca7933e47d3a-1~exp1~20260714134950.86)) than the compiler ((1~deb12u1))
1 error generated.
555.154 [791/62/3329] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCLowerMASSVEntries.cpp.o
555.409 [791/61/3330] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVFoldMemOffset.cpp.o
555.511 [791/60/3331] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCVSXSwapRemoval.cpp.o
555.631 [791/59/3332] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCMIPeephole.cpp.o
555.681 [791/58/3333] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonTargetMachine.cpp.o
555.978 [791/57/3334] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXISelDAGToDAG.cpp.o
556.012 [791/56/3335] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCRegisterInfo.cpp.o
556.192 [791/55/3336] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonVectorCombine.cpp.o
556.268 [791/54/3337] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCodeGenPrepare.cpp.o
556.629 [791/53/3338] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVDeadRegisterDefinitions.cpp.o
556.733 [791/52/3339] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCPreEmitPeephole.cpp.o
557.077 [791/51/3340] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandAtomicPseudoInsts.cpp.o
557.354 [791/50/3341] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVPostRAExpandPseudoInsts.cpp.o
557.927 [791/49/3342] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVInsertReadWriteCSR.cpp.o
558.131 [791/48/3343] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVInsertWriteVXRM.cpp.o
558.578 [791/47/3344] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCFrameLowering.cpp.o
558.739 [791/46/3345] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVExpandPseudoInsts.cpp.o
559.057 [791/45/3346] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCAsmPrinter.cpp.o
559.401 [791/44/3347] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCFastISel.cpp.o
559.580 [791/43/3348] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVLateBranchOpt.cpp.o
559.727 [791/42/3349] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVIndirectBranchTracking.cpp.o
559.762 [791/41/3350] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVInterleavedAccess.cpp.o
560.060 [791/40/3351] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVMakeCompressible.cpp.o
560.075 [791/39/3352] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVCallingConv.cpp.o
560.260 [791/38/3353] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVMachineFunctionInfo.cpp.o
560.664 [791/37/3354] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVLandingPadSetup.cpp.o
560.811 [791/36/3355] Building CXX object lib/Target/Lanai/CMakeFiles/LLVMLanaiCodeGen.dir/LanaiCodeGenPassBuilder.cpp.o
561.356 [791/35/3356] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVMoveMerger.cpp.o
561.537 [791/34/3357] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVOptWInstrs.cpp.o
561.857 [791/33/3358] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVLoadStoreOptimizer.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/215956