[flang-commits] [compiler-rt] [flang] [llvm] [AArch64] fix trampoline implementation: use X15 (PR #126743)

Wed Jun 11 19:33:56 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 `compiler-rt,flang,llvm` at step 12 "build-stage2-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/13056

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

```
Step 12 (build-stage2-unified-tree) failure: build (failure)
...
196.377 [1025/314/5259] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCTargetMachine.cpp.o
196.409 [1025/313/5260] Building CXX object lib/Target/Hexagon/CMakeFiles/LLVMHexagonCodeGen.dir/HexagonInstrInfo.cpp.o
196.417 [1025/312/5261] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64Subtarget.cpp.o
196.439 [1025/311/5262] Building CXX object unittests/ExecutionEngine/Orc/CMakeFiles/OrcJITTests.dir/ReOptimizeLayerTest.cpp.o
196.493 [1025/310/5263] Building CXX object lib/Target/XCore/CMakeFiles/LLVMXCoreCodeGen.dir/XCoreTargetMachine.cpp.o
196.508 [1024/310/5264] Linking CXX static library lib/libLLVMXCoreCodeGen.a
196.511 [1024/309/5265] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/InstSizes.cpp.o
196.630 [1024/308/5266] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVModuleAnalysis.cpp.o
196.718 [1024/307/5267] Building CXX object tools/clang/lib/Analysis/CMakeFiles/obj.clangAnalysis.dir/UnsafeBufferUsage.cpp.o
196.737 [1024/306/5268] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o
FAILED: lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/install/stage1/bin/clang++ -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/stage2/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/stage2/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 -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 -Wmisleading-indentation -Wctad-maybe-unsupported -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/AArch64ISelLowering.cpp.o -MF lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o.d -o lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:7157:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
 7157 |   case CallingConv::ARM64EC_Thunk_Native:
      |   ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:7157:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
 7157 |   case CallingConv::ARM64EC_Thunk_Native:
      |   ^
      |   LLVM_FALLTHROUGH; 
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp:7157:3: note: insert 'break;' to avoid fall-through
 7157 |   case CallingConv::ARM64EC_Thunk_Native:
      |   ^
      |   break; 
1 error generated.
196.991 [1024/305/5269] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64StackTaggingPreRA.cpp.o
197.010 [1024/304/5270] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMBaseInstrInfo.cpp.o
197.013 [1024/303/5271] Building CXX object lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86LoadValueInjectionLoadHardening.cpp.o
197.015 [1024/302/5272] Building CXX object lib/Target/RISCV/MCTargetDesc/CMakeFiles/LLVMRISCVDesc.dir/RISCVMCAsmInfo.cpp.o
197.038 [1024/301/5273] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/JSONNodeDumper.cpp.o
197.094 [1024/300/5274] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVStructurizer.cpp.o
197.160 [1024/299/5275] Building CXX object tools/clang/tools/diagtool/CMakeFiles/diagtool.dir/ShowEnabledWarnings.cpp.o
197.232 [1024/298/5276] Building CXX object tools/clang/lib/Frontend/CMakeFiles/obj.clangFrontend.dir/FrontendActions.cpp.o
197.232 [1024/297/5277] Building CXX object lib/Target/ARM/CMakeFiles/LLVMARMCodeGen.dir/ARMInstructionSelector.cpp.o
197.268 [1024/296/5278] Building CXX object lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86MCInstLower.cpp.o
197.370 [1024/295/5279] Building CXX object unittests/ExecutionEngine/Orc/CMakeFiles/OrcJITTests.dir/ResourceTrackerTest.cpp.o
197.506 [1024/294/5280] Building CXX object lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86SpeculativeLoadHardening.cpp.o
197.537 [1024/293/5281] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o
197.550 [1024/292/5282] Building CXX object lib/Target/VE/CMakeFiles/LLVMVECodeGen.dir/VEISelLowering.cpp.o
197.575 [1024/291/5283] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64BranchTargets.cpp.o
197.596 [1024/290/5284] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CleanupLocalDynamicTLSPass.cpp.o
197.747 [1024/289/5285] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ItaniumMangle.cpp.o
197.757 [1024/288/5286] Building AMDGPUGenCallingConv.inc...
197.804 [1024/287/5287] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGObjC.cpp.o
197.952 [1024/286/5288] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/GISel/PPCInstructionSelector.cpp.o
197.991 [1024/285/5289] Building CXX object lib/Target/Mips/CMakeFiles/LLVMMipsCodeGen.dir/MipsTargetMachine.cpp.o
198.004 [1024/284/5290] Building CXX object tools/llvm-exegesis/lib/X86/CMakeFiles/LLVMExegesisX86.dir/Target.cpp.o
198.051 [1024/283/5291] Building CXX object lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86PartialReduction.cpp.o
198.106 [1024/282/5292] Building CXX object unittests/ExecutionEngine/Orc/CMakeFiles/OrcJITTests.dir/JITLinkRedirectionManagerTest.cpp.o
198.123 [1024/281/5293] Building CXX object lib/Target/PowerPC/CMakeFiles/LLVMPowerPCCodeGen.dir/PPCTargetTransformInfo.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/126743