[llvm] [ADT] Bitset: add shift operators, word accessors, and etc (PR #193400)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Tue May 5 04:05:47 PDT 2026 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `mlir-nvidia-gcc7` running on `mlir-nvidia` while building `llvm` at step 6 "build-check-mlir-build-only".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/116/builds/28199

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

```
Step 6 (build-check-mlir-build-only) failure: build (failure)
...
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineInstr.h:26,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineBasicBlock.h:22,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineFunction.h:26,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineFunctionPass.h:21,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/ExecutionDomainFix.h:27,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/ExecutionDomainFix.cpp:9:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGenTypes/LowLevelType.h:629:15: warning: ‘llvm::LLT::Info’ is too small to hold all values of ‘enum class llvm::LLT::Kind’
   Kind Info : 4;
               ^
12.776 [4273/16/1010] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/RuntimeLibcalls.cpp.o
FAILED: lib/IR/CMakeFiles/LLVMCore.dir/RuntimeLibcalls.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/g++-7 -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/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/lib/IR -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/IR -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/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-array-bounds -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -std=c++1z -MD -MT lib/IR/CMakeFiles/LLVMCore.dir/RuntimeLibcalls.cpp.o -MF lib/IR/CMakeFiles/LLVMCore.dir/RuntimeLibcalls.cpp.o.d -o lib/IR/CMakeFiles/LLVMCore.dir/RuntimeLibcalls.cpp.o -c /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/IR/RuntimeLibcalls.cpp
In file included from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/IR/RuntimeLibcalls.h:20:0,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/IR/RuntimeLibcalls.cpp:9:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/ADT/Bitset.h: In member function ‘constexpr uint64_t llvm::Bitset<NumBits>::getWord64(unsigned int) const’:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/ADT/Bitset.h:271:7: error: static assertion failed: Unsupported word size
       static_assert(BitwordBits == 32, "Unsupported word size");
       ^~~~~~~~~~~~~
13.625 [4273/15/1011] Building X86GenFastISel.inc...
16.374 [4273/14/1012] Building X86GenGlobalISel.inc...
17.781 [4273/13/1013] Building X86GenDAGISel.inc...
20.058 [4273/12/1014] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/g++-7 -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/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/lib/CodeGen -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/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-array-bounds -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -std=c++1z -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/AtomicExpandPass.cpp.o -c /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/AtomicExpandPass.cpp
In file included from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/IR/RuntimeLibcalls.h:20:0,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/Analysis/RuntimeLibcallInfo.h:12,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/LibcallLoweringInfo.h:13,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/TargetLowering.h:32,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/AtomicExpandPass.cpp:24:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/ADT/Bitset.h: In member function ‘constexpr uint64_t llvm::Bitset<NumBits>::getWord64(unsigned int) const’:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/ADT/Bitset.h:271:7: error: static assertion failed: Unsupported word size
       static_assert(BitwordBits == 32, "Unsupported word size");
       ^~~~~~~~~~~~~
In file included from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/LowLevelTypeUtils.h:20:0,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/TargetLowering.h:33,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/AtomicExpandPass.cpp:24:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGenTypes/LowLevelType.h: At global scope:
/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGenTypes/LowLevelType.h:629:15: warning: ‘llvm::LLT::Info’ is too small to hold all values of ‘enum class llvm::LLT::Kind’
   Kind Info : 4;
               ^
20.092 [4273/11/1015] Building CXX object lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CallingConvLower.cpp.o
FAILED: lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CallingConvLower.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/g++-7 -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/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/lib/CodeGen -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.obj/include -I/vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/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-array-bounds -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -std=c++1z -MD -MT lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CallingConvLower.cpp.o -MF lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CallingConvLower.cpp.o.d -o lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/CallingConvLower.cpp.o -c /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/CallingConvLower.cpp
In file included from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineMemOperand.h:22:0,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineInstr.h:26,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineBasicBlock.h:22,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/TargetFrameLowering.h:17,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/include/llvm/CodeGen/MachineFrameInfo.h:18,
                 from /vol/worker/mlir-nvidia/mlir-nvidia-gcc7/llvm.src/llvm/lib/CodeGen/CallingConvLower.cpp:15:

```

</details>

https://github.com/llvm/llvm-project/pull/193400

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