[llvm] [RISCV][TTI] Use processShuffleMask for shuffle legalization estimate (PR #136191)

Tue Apr 22 11:46:21 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-devrel-x86-64` running on `ml-opt-devrel-x86-64-b2` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/175/builds/17306

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
1168.599 [355/64/3441] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVVMV0Elimination.cpp.o
1169.043 [354/64/3442] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVRegisterInfo.cpp.o
1171.826 [353/64/3443] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZMachineFunctionInfo.cpp.o
1172.750 [352/64/3444] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVInstrInfo.cpp.o
1173.626 [351/64/3445] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVVLOptimizer.cpp.o
1174.370 [350/64/3446] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVZacasABIFix.cpp.o
1174.399 [349/64/3447] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVCallLowering.cpp.o
1176.419 [348/64/3448] Building CXX object lib/Target/Sparc/CMakeFiles/LLVMSparcCodeGen.dir/SparcISelLowering.cpp.o
1176.586 [347/64/3449] Linking CXX static library lib/libLLVMSparcCodeGen.a
1177.799 [346/64/3450] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetTransformInfo.cpp.o
FAILED: lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetTransformInfo.cpp.o 
ccache /usr/bin/c++ -DCPUINFO_SUPPORTED_PLATFORM=1 -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/b/ml-opt-devrel-x86-64-b1/build/lib/Target/RISCV -I/b/ml-opt-devrel-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-devrel-x86-64-b1/build/include -I/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/include -isystem /tmp/tflitebuild/tensorflow/include -isystem /tmp/tflitebuild/eigen/include/eigen3 -isystem /tmp/tflitebuild/abseil-cpp/include -isystem /tmp/tflitebuild/flatbuffers/include -isystem /tmp/tflitebuild/gemmlowp/include/gemmlowp -isystem /tmp/tflitebuild/ml_dtypes/src/ml_dtypes -isystem /tmp/tflitebuild/ml_dtypes/src/ml_dtypes/ml_dtypes -isystem /tmp/tflitebuild/ruy/include -isystem /tmp/tflitebuild/cpuinfo/include -isystem /tmp/tflitebuild/ARM_NEON_2_x86_SSE/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 -UNDEBUG -DEIGEN_NEON_GEBP_NR=4 -DTFL_STATIC_LIBRARY_BUILD -std=c++17 -MD -MT lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetTransformInfo.cpp.o -MF lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetTransformInfo.cpp.o.d -o lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetTransformInfo.cpp.o -c /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp: In member function ‘llvm::InstructionCost llvm::RISCVTTIImpl::getShuffleCost(llvm::TargetTransformInfo::ShuffleKind, llvm::VectorType*, llvm::ArrayRef<int>, llvm::TargetTransformInfo::TargetCostKind, int, llvm::VectorType*, llvm::ArrayRef<const llvm::Value*>, const llvm::Instruction*) const’:
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp:710: error: binding reference of type ‘llvm::RISCVTTIImpl&’ to ‘const llvm::RISCVTTIImpl’ discards qualifiers
  710 |           costShuffleViaSplitting(*this, LT.second, FVTp, Mask, CostKind);
      | 
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp:392: note:   initializing argument 1 of ‘llvm::InstructionCost costShuffleViaSplitting(llvm::RISCVTTIImpl&, llvm::MVT, llvm::VectorType*, llvm::ArrayRef<int>, llvm::TargetTransformInfo::TargetCostKind)’
  392 | static InstructionCost costShuffleViaSplitting(RISCVTTIImpl &TTI, MVT LegalVT,
      | 
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp: At global scope:
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp:392: warning: ‘llvm::InstructionCost costShuffleViaSplitting(llvm::RISCVTTIImpl&, llvm::MVT, llvm::VectorType*, llvm::ArrayRef<int>, llvm::TargetTransformInfo::TargetCostKind)’ defined but not used [-Wunused-function]
1177.950 [346/63/3451] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVRegisterBankInfo.cpp.o
1180.719 [346/62/3452] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZTargetObjectFile.cpp.o
1182.489 [346/61/3453] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVLegalizerInfo.cpp.o
1183.289 [346/60/3454] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVAPI.cpp.o
1184.867 [346/59/3455] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZCallingConv.cpp.o
1185.897 [346/58/3456] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVInstrInfo.cpp.o
1189.150 [346/57/3457] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZCopyPhysRegs.cpp.o
1189.416 [346/56/3458] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVMCInstLower.cpp.o
1189.731 [346/55/3459] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVAsmPrinter.cpp.o
1190.160 [346/54/3460] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVPostLegalizerCombiner.cpp.o
1190.505 [346/53/3461] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/GISel/RISCVO0PreLegalizerCombiner.cpp.o
1190.527 [346/52/3462] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZHazardRecognizer.cpp.o
1190.721 [346/51/3463] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVInlineAsmLowering.cpp.o
1190.850 [346/50/3464] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZPostRewrite.cpp.o
1191.339 [346/49/3465] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZMachineScheduler.cpp.o
1191.530 [346/48/3466] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZElimCompare.cpp.o
1192.444 [346/47/3467] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZLongBranch.cpp.o
1193.082 [346/46/3468] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZLDCleanup.cpp.o
1193.821 [346/45/3469] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVCallLowering.cpp.o
1193.841 [346/44/3470] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVLegalizerInfo.cpp.o
1194.007 [346/43/3471] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZSubtarget.cpp.o
1194.027 [346/42/3472] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZSelectionDAGInfo.cpp.o
1194.107 [346/41/3473] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVISelLowering.cpp.o
1194.528 [346/40/3474] Building CXX object lib/Target/RISCV/CMakeFiles/LLVMRISCVCodeGen.dir/RISCVTargetMachine.cpp.o
1194.897 [346/39/3475] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZShortenInst.cpp.o
1194.907 [346/38/3476] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVStripConvergentIntrinsics.cpp.o
1195.445 [346/37/3477] Building CXX object lib/Target/SystemZ/CMakeFiles/LLVMSystemZCodeGen.dir/SystemZMCInstLower.cpp.o
1195.459 [346/36/3478] Building CXX object lib/Target/SPIRV/CMakeFiles/LLVMSPIRVCodeGen.dir/SPIRVRegisterInfo.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/136191