nathanchance added a comment.
This patch breaks a two stage build with LTO:
$ git bisect log
# bad: [f0bc2782f281ca05221d2f1735bbaff6c4b81ebb] [TTI] NFC: Remove unused
'OptSize' parameter from shouldMaximizeVectorBandwidth
# good: [9829f5e6b1bca9b61efc629770d28bb9014dec45] [CVP]
@llvm.[us]{min,max}() intrinsics handling
git bisect start 'f0bc2782f281ca05221d2f1735bbaff6c4b81ebb'
'9829f5e6b1bca9b61efc629770d28bb9014dec45'
# bad: [1af35e77f4b8c3314dc20a10d579b52f22c75a00] [TTI] NFC: Change
getVectorInstrCost to return InstructionCost
git bisect bad 1af35e77f4b8c3314dc20a10d579b52f22c75a00
# bad: [45f8946a759a780e6131256d6d206977b9c128ee] [CodeView] Fix the ARM64
CPUType enum
git bisect bad 45f8946a759a780e6131256d6d206977b9c128ee
# good: [0b439e4cc9dbb5c226121383b84d4f48ab669c55] [libc++] Split
std::allocator out of <memory>
git bisect good 0b439e4cc9dbb5c226121383b84d4f48ab669c55
# good: [2eb98d89ac866e32cb56727174e4d1c1413479c8] [mlir][spirv] Allow
bitwidth emulation on runtime arrays
git bisect good 2eb98d89ac866e32cb56727174e4d1c1413479c8
# bad: [80aa9b0f7b3ebe53220a398b2939610d8a49e24b] [PowerPC] stop reverse mem
op generation for some cases.
git bisect bad 80aa9b0f7b3ebe53220a398b2939610d8a49e24b
# good: [a8ab1f98d22cf15f39dd1c2ce77675e628fceb31] [Evaluator] Look through
invariant.group intrinsics
git bisect good a8ab1f98d22cf15f39dd1c2ce77675e628fceb31
# bad: [30f591c3869f3bbe6eca1249dcef1b8337312de6] [lldb] Disable
TestLaunchProcessPosixSpawn.py with reproducers
git bisect bad 30f591c3869f3bbe6eca1249dcef1b8337312de6
# good: [6c4f2508e4278ac789230cb05f2bb56a8a7297dc] Revert "[lldb] [gdb-remote
client] Refactor handling qSupported"
git bisect good 6c4f2508e4278ac789230cb05f2bb56a8a7297dc
# bad: [e96df3e531f506eea75da0f13d0f8aa9a267f975] [Passes] Add relative
lookup table converter pass
git bisect bad e96df3e531f506eea75da0f13d0f8aa9a267f975
# good: [1310a19af06262122a6e9e4f6fbbe9c39ebad76e] [mlir] Use MCJIT to fix
integration tests
git bisect good 1310a19af06262122a6e9e4f6fbbe9c39ebad76e
# first bad commit: [e96df3e531f506eea75da0f13d0f8aa9a267f975] [Passes] Add
relative lookup table converter pass
My reproduction steps, apologies if they are not reduced enough:
$ mkdir -p build/stage{1,2}
$ cmake \
-B build/stage1 \
-G Ninja \
-DCMAKE_C_COMPILER=$(command -v clang) \
-DCMAKE_CXX_COMPILER=$(command -v clang++) \
-DLLVM_USE_LINKER=$(command -v ld.lld) \
-DLLVM_ENABLE_PROJECTS="clang;lld" \
-DLLVM_TARGETS_TO_BUILD=host \
-DLLVM_CCACHE_BUILD=ON \
-DCMAKE_BUILD_TYPE=Release \
llvm
...
$ ninja -C build/stage1 all
...
$ cmake \
-B build/stage2 \
-G Ninja \
-DCMAKE_AR=$PWD/build/stage1/bin/llvm-ar \
-DCMAKE_C_COMPILER=$PWD/build/stage1/bin/clang \
-DCLANG_TABLEGEN=$PWD/build/stage1/bin/clang-tblgen \
-DCMAKE_CXX_COMPILER=$PWD/build/stage1/bin/clang++ \
-DLLVM_USE_LINKER=$PWD/build/stage1/bin/ld.lld \
-DLLVM_TABLEGEN=$PWD/build/stage1/bin/llvm-tblgen \
-DCMAKE_RANLIB=$PWD/build/stage1/bin/llvm-ranlib \
-DLLVM_ENABLE_PROJECTS=clang \
-DLLVM_TARGETS_TO_BUILD=host \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_ENABLE_LTO=Full \
llvm
$ ninja -C build/stage2 lib/libclang-cpp.so.13git
...
[2296/2296] Linking CXX shared library lib/libclang-cpp.so.13git
FAILED: lib/libclang-cpp.so.13git
...
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
llvm::detail::unit<std::ratio<3600l, 1l> >::value; recompile with -fPIC
>>> defined in lto.tmp
>>> referenced by ld-temp.o
>>>
lto.tmp:(.data.rel.ro..Lreltable._ZN5clang10TargetInfo21getTypeFormatModifierENS_23TransferrableTargetInfo7IntTypeE+0x8)
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
llvm::detail::unit<std::ratio<3600l, 1l> >::value; recompile with -fPIC
>>> defined in lto.tmp
>>> referenced by ld-temp.o
>>>
lto.tmp:(.data.rel.ro..Lreltable._ZN5clang10TargetInfo21getTypeFormatModifierENS_23TransferrableTargetInfo7IntTypeE+0xC)
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
llvm::detail::unit<std::ratio<3600l, 1l> >::value; recompile with -fPIC
>>> defined in lto.tmp
>>> referenced by ld-temp.o
>>>
lto.tmp:(.data.rel.ro..Lreltable._ZNK5clang21analyze_format_string14LengthModifier8toStringEv+0x8)
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
llvm::detail::unit<std::ratio<60l, 1l> >::value; recompile with -fPIC
>>> defined in lto.tmp
>>> referenced by ld-temp.o
>>>
lto.tmp:(.data.rel.ro..Lreltable._ZNK5clang21analyze_format_string14LengthModifier8toStringEv+0x3C)
ld.lld: error: relocation R_X86_64_PC32 cannot be used against symbol
llvm::detail::unit<std::ratio<3600l, 1l> >::value; recompile with -fPIC
>>> defined in lto.tmp
>>> referenced by ld-temp.o
>>>
lto.tmp:(.data.rel.ro..Lreltable._ZN4llvm15MCSymbolRefExpr18getVariantKindNameENS0_11VariantKindE+0xC0)
clang-13: error: linker command failed with exit code 1 (use -v to see
invocation)
ninja: build stopped: subcommand failed.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D94355/new/
https://reviews.llvm.org/D94355
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