[llvm-bugs] [Bug 50440] New: "StepValue is not an integer" assertion failed with x86_64 allmodconfig Linux kernel
via llvm-bugs
llvm-bugs at lists.llvm.org
Fri May 21 19:39:27 PDT 2021
https://bugs.llvm.org/show_bug.cgi?id=50440
Bug ID: 50440
Summary: "StepValue is not an integer" assertion failed with
x86_64 allmodconfig Linux kernel
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Loop Optimizer
Assignee: unassignedbugs at nondot.org
Reporter: natechancellor at gmail.com
CC: llvm-bugs at lists.llvm.org
Created attachment 24881
--> https://bugs.llvm.org/attachment.cgi?id=24881&action=edit
Reduced fs/gfs2/rgrp.c
After Profile Guided Optimization support was added to the Linux kernel [1],
there is a crash in fs/gfs2/rgrp.o:
$ make -skj"$(nproc)" LLVM=1 LLVM_IAS=1 O=build/x86_64 distclean allmodconfig
fs/gfs2/rgrp.o
clang:
/home/nathan/cbl/github/tc-build/llvm-project/llvm/lib/Analysis/IVDescriptors.cpp:959:
llvm::InductionDescriptor::InductionDescriptor(llvm::Value *,
llvm::InductionDescriptor::InductionKind, const llvm::SCEV *,
llvm::BinaryOperator *, SmallVectorImpl<llvm::Instruction *> *): Assertion `(IK
== IK_FpInduction || Step->getType()->isIntegerTy()) && "StepValue is not an
integer"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang -Qunused-arguments
-fmacro-prefix-map=/home/nathan/cbl/src/linux-next/= -Wall -Wundef
-Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-fshort-wchar -fno-PIE -Werror=implicit-function-declaration
-Werror=implicit-int -Werror=return-type -Wno-format-security -std=gnu89
-Werror=unknown-warning-option -integrated-as -mno-sse -mno-mmx -mno-sse2
-mno-3dnow -mno-avx -fcf-protection=none -m64 -mno-80387 -mstack-alignment=8
-mtune=generic -mno-red-zone -mcmodel=kernel -Wno-sign-compare
-fno-asynchronous-unwind-tables -mretpoline-external-thunk
-fno-delete-null-pointer-checks -Wno-frame-address
-Wno-address-of-packed-member -O2 -Wframe-larger-than=2048
-fstack-protector-strong -Wno-format-invalid-specifier -Wno-gnu
-mno-global-merge -Wno-unused-const-variable -ftrivial-auto-var-init=pattern
-fno-stack-clash-protection -pg -mfentry -falign-functions=64
-Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-array-bounds
-fno-strict-overflow -fno-stack-check -Werror=date-time
-Werror=incompatible-pointer-types -Wno-initializer-overrides -Wno-format
-Wno-sign-compare -Wno-format-zero-length -Wno-pointer-to-enum-cast
-Wno-tautological-constant-out-of-range-compare -fprofile-generate
-fsanitize=kernel-address -mllvm -asan-mapping-offset=0xdffffc0000000000 -mllvm
-asan-globals=1 -mllvm -asan-instrumentation-with-call-threshold=0 -mllvm
-asan-stack=0 --param asan-instrument-allocas=1 -fsanitize=array-bounds
-fsanitize=shift -fsanitize=integer-divide-by-zero -fsanitize=object-size
-fsanitize=bool -fsanitize=enum -fsanitize-coverage=trace-pc
-fsanitize-coverage=trace-cmp -nostdinc -isystem
/home/nathan/cbl/github/tc-build/build/llvm/stage1/lib/clang/13.0.0/include
-I/home/nathan/cbl/src/linux-next/arch/x86/include
-I./arch/x86/include/generated -I/home/nathan/cbl/src/linux-next/include
-I./include -I/home/nathan/cbl/src/linux-next/arch/x86/include/uapi
-I./arch/x86/include/generated/uapi
-I/home/nathan/cbl/src/linux-next/include/uapi -I./include/generated/uapi
-include /home/nathan/cbl/src/linux-next/include/linux/compiler-version.h
-include /home/nathan/cbl/src/linux-next/include/linux/kconfig.h -include
/home/nathan/cbl/src/linux-next/include/linux/compiler_types.h -D__KERNEL__
-DCONFIG_X86_X32_ABI -DCC_USING_NOP_MCOUNT -DCC_USING_FENTRY -Ifs/gfs2 -I
/home/nathan/cbl/src/linux-next/fs/gfs2 -I ./fs/gfs2 -DMODULE
-DKBUILD_BASENAME=\"rgrp\" -DKBUILD_MODNAME=\"gfs2\"
-D__KBUILD_MODNAME=kmod_gfs2 -c -Wp,-MMD,fs/gfs2/.rgrp.o.d -fcolor-diagnostics
-o fs/gfs2/rgrp.o /home/nathan/cbl/src/linux-next/fs/gfs2/rgrp.c
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module
'/home/nathan/cbl/src/linux-next/fs/gfs2/rgrp.c'.
4. Running pass 'Loop Pass Manager' on function '@gfs2_rgrp_verify'
5. Running pass 'Canonicalize Freeze Instructions in Loops' on basic block
'%cont21'
#0 0x0000000002a0e883 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x2a0e883)
#1 0x0000000002a0c6ee llvm::sys::RunSignalHandlers()
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x2a0c6ee)
#2 0x00000000029995a3 (anonymous
namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long)
CrashRecoveryContext.cpp:0:0
#3 0x00000000029996de CrashRecoverySignalHandler(int)
CrashRecoveryContext.cpp:0:0
#4 0x00007f012020c870 __restore_rt sigaction.c:0:0
#5 0x00007f011fcc6d22 raise (/usr/lib/libc.so.6+0x3cd22)
#6 0x00007f011fcb0862 abort (/usr/lib/libc.so.6+0x26862)
#7 0x00007f011fcb0747 _nl_load_domain.cold loadmsgcat.c:0:0
#8 0x00007f011fcbf616 (/usr/lib/libc.so.6+0x35616)
#9 0x0000000001c832d6
llvm::InductionDescriptor::InductionDescriptor(llvm::Value*,
llvm::InductionDescriptor::InductionKind, llvm::SCEV const*,
llvm::BinaryOperator*, llvm::SmallVectorImpl<llvm::Instruction*>*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x1c832d6)
#10 0x0000000001c84374
llvm::InductionDescriptor::isInductionPHI(llvm::PHINode*, llvm::Loop const*,
llvm::ScalarEvolution*, llvm::InductionDescriptor&, llvm::SCEV const*,
llvm::SmallVectorImpl<llvm::Instruction*>*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x1c84374)
#11 0x0000000002a34cc4 (anonymous
namespace)::CanonicalizeFreezeInLoopsImpl::run()
CanonicalizeFreezeInLoops.cpp:0:0
#12 0x0000000002a35e4d (anonymous
namespace)::CanonicalizeFreezeInLoops::runOnLoop(llvm::Loop*,
llvm::LPPassManager&) CanonicalizeFreezeInLoops.cpp:0:0
#13 0x0000000001eb5a93 llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x1eb5a93)
#14 0x0000000002352868 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x2352868)
#15 0x000000000235adb1 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x235adb1)
#16 0x0000000002353331 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x2353331)
#17 0x00000000030e1c46 (anonymous
namespace)::EmitAssemblyHelper::EmitAssemblyWithNewPassManager(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >) BackendUtil.cpp:0:0
#18 0x00000000030dc547 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef,
llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x30dc547)
#19 0x0000000003570ff1
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
CodeGenAction.cpp:0:0
#20 0x0000000003ea8b14 clang::ParseAST(clang::Sema&, bool, bool)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x3ea8b14)
#21 0x00000000034c65d0 clang::FrontendAction::Execute()
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x34c65d0)
#22 0x000000000343adbf
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x343adbf)
#23 0x000000000356aec7
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x356aec7)
#24 0x000000000186f4f1 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*) (/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x186f4f1)
#25 0x000000000186cf3d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
driver.cpp:0:0
#26 0x00000000032dede2 void llvm::function_ref<void
()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const::$_1>(long) Job.cpp:0:0
#27 0x00000000029994b7
llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x29994b7)
#28 0x00000000032de947
clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x32de947)
#29 0x00000000032a68a8
clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&,
clang::driver::Command const*&) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x32a68a8)
#30 0x00000000032a6ba7
clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x32a6ba7)
#31 0x00000000032bf621
clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x32bf621)
#32 0x000000000186c806 main
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x186c806)
#33 0x00007f011fcb1b25 __libc_start_main (/usr/lib/libc.so.6+0x27b25)
#34 0x0000000001869b8e _start
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang+0x1869b8e)
clang-13: error: clang frontend command failed with exit code 134 (use -v to
see invocation)
ClangBuiltLinux clang version 13.0.0 (https://github.com/llvm/llvm-project
f50b87e9ef42efe80e2b3364df848d102075dd11)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/nathan/cbl/github/tc-build/build/llvm/stage1/bin
clang-13: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-13: note: diagnostic msg: /tmp/rgrp-f2a81f.c
clang-13: note: diagnostic msg: /tmp/rgrp-f2a81f.sh
clang-13: note: diagnostic msg:
********************
make[4]: *** [/home/nathan/cbl/src/linux-next/scripts/Makefile.build:273:
fs/gfs2/rgrp.o] Error 134
make[4]: Target '__build' not remade because of errors.
make[3]: *** [/home/nathan/cbl/src/linux-next/scripts/Makefile.build:534:
fs/gfs2] Error 2
make[3]: Target '__build' not remade because of errors.
make[2]: *** [/home/nathan/cbl/src/linux-next/Makefile:1954: fs] Error 2
make[2]: Target 'fs/gfs2/rgrp.o' not remade because of errors.
make[1]: *** [/home/nathan/cbl/src/linux-next/Makefile:353: __build_one_by_one]
Error 2
make[1]: Target 'distclean' not remade because of errors.
make[1]: Target 'allmodconfig' not remade because of errors.
make[1]: Target 'fs/gfs2/rgrp.o' not remade because of errors.
make: *** [Makefile:222: __sub-make] Error 2
make: Target 'distclean' not remade because of errors.
make: Target 'allmodconfig' not remade because of errors.
make: Target 'fs/gfs2/rgrp.o' not remade because of errors.
I ended up reducing down the file and discovered that it seems to be an
interaction between '-fprofile-generate', '-fsanitize=object-size', '-mno-sse',
and '-O2'.
$ cat rgrp.i
gfs2_rgrp_verify_rgd_0;
struct gfs2_bitmap *gfs2_rgrp_verify_bi;
struct gfs2_bitmap {
int bi_bytes
} gfs2_bitcount(char *buffer, int buflen) {
char *end = buffer + buflen;
for (; buffer < end; buffer++)
;
}
gfs2_rgrp_verify() {
for (; gfs2_rgrp_verify_rgd_0;)
gfs2_bitcount(gfs2_rgrp_verify_bi, gfs2_rgrp_verify_bi->bi_bytes);
}
$ clang -fprofile-generate -fsanitize=object-size -mno-sse -O2 -c -o /dev/null
rgrp.i
...
clang:
/home/nathan/cbl/github/tc-build/llvm-project/llvm/lib/Analysis/IVDescriptors.cpp:959:
llvm::InductionDescriptor::InductionDescriptor(llvm::Value *,
llvm::InductionDescriptor::InductionKind, const llvm::SCEV *,
llvm::BinaryOperator *, SmallVectorImpl<llvm::Instruction *> *): Assertion `(IK
== IK_FpInduction || Step->getType()->isIntegerTy()) && "StepValue is not an
integer"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang -fprofile-generate -fsanitize=object-size
-mno-sse -O2 -c -o /dev/null rgrp.i
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'rgrp.i'.
4. Running pass 'Loop Pass Manager' on function '@gfs2_rgrp_verify'
5. Running pass 'Canonicalize Freeze Instructions in Loops' on basic block
'%for.body'
#0 0x0000000002a0e883 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2a0e883)
#1 0x0000000002a0c6ee llvm::sys::RunSignalHandlers()
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2a0c6ee)
#2 0x00000000029995a3 (anonymous
namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long)
CrashRecoveryContext.cpp:0:0
#3 0x00000000029996de CrashRecoverySignalHandler(int)
CrashRecoveryContext.cpp:0:0
#4 0x00007f804b63b870 __restore_rt sigaction.c:0:0
#5 0x00007f804b0f5d22 raise (/usr/lib/libc.so.6+0x3cd22)
#6 0x00007f804b0df862 abort (/usr/lib/libc.so.6+0x26862)
#7 0x00007f804b0df747 _nl_load_domain.cold loadmsgcat.c:0:0
#8 0x00007f804b0ee616 (/usr/lib/libc.so.6+0x35616)
#9 0x0000000001c832d6
llvm::InductionDescriptor::InductionDescriptor(llvm::Value*,
llvm::InductionDescriptor::InductionKind, llvm::SCEV const*,
llvm::BinaryOperator*, llvm::SmallVectorImpl<llvm::Instruction*>*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1c832d6)
#10 0x0000000001c84374
llvm::InductionDescriptor::isInductionPHI(llvm::PHINode*, llvm::Loop const*,
llvm::ScalarEvolution*, llvm::InductionDescriptor&, llvm::SCEV const*,
llvm::SmallVectorImpl<llvm::Instruction*>*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1c84374)
#11 0x0000000002a34cc4 (anonymous
namespace)::CanonicalizeFreezeInLoopsImpl::run()
CanonicalizeFreezeInLoops.cpp:0:0
#12 0x0000000002a35e4d (anonymous
namespace)::CanonicalizeFreezeInLoops::runOnLoop(llvm::Loop*,
llvm::LPPassManager&) CanonicalizeFreezeInLoops.cpp:0:0
#13 0x0000000001eb5a93 llvm::LPPassManager::runOnFunction(llvm::Function&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1eb5a93)
#14 0x0000000002352868 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2352868)
#15 0x000000000235adb1 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x235adb1)
#16 0x0000000002353331 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x2353331)
#17 0x00000000030e1c46 (anonymous
namespace)::EmitAssemblyHelper::EmitAssemblyWithNewPassManager(clang::BackendAction,
std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >) BackendUtil.cpp:0:0
#18 0x00000000030dc547 clang::EmitBackendOutput(clang::DiagnosticsEngine&,
clang::HeaderSearchOptions const&, clang::CodeGenOptions const&,
clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef,
llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x30dc547)
#19 0x0000000003570ff1
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&)
CodeGenAction.cpp:0:0
#20 0x0000000003ea8b14 clang::ParseAST(clang::Sema&, bool, bool)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x3ea8b14)
#21 0x00000000034c65d0 clang::FrontendAction::Execute()
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x34c65d0)
#22 0x000000000343adbf
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x343adbf)
#23 0x000000000356aec7
clang::ExecuteCompilerInvocation(clang::CompilerInstance*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x356aec7)
#24 0x000000000186f4f1 cc1_main(llvm::ArrayRef<char const*>, char const*,
void*)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x186f4f1)
#25 0x000000000186cf3d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&)
driver.cpp:0:0
#26 0x00000000032dede2 void llvm::function_ref<void
()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const::$_1>(long) Job.cpp:0:0
#27 0x00000000029994b7
llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x29994b7)
#28 0x00000000032de947
clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef>
>, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >*, bool*) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x32de947)
#29 0x00000000032a68a8
clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&,
clang::driver::Command const*&) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x32a68a8)
#30 0x00000000032a6ba7
clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x32a6ba7)
#31 0x00000000032bf621
clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&,
llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&)
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x32bf621)
#32 0x000000000186c806 main
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x186c806)
#33 0x00007f804b0e0b25 __libc_start_main (/usr/lib/libc.so.6+0x27b25)
#34 0x0000000001869b8e _start
(/home/nathan/cbl/github/tc-build/build/llvm/stage1/bin/clang-13+0x1869b8e)
clang-13: error: clang frontend command failed with exit code 134 (use -v to
see invocation)
ClangBuiltLinux clang version 13.0.0 (https://github.com/llvm/llvm-project
f50b87e9ef42efe80e2b3364df848d102075dd11)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/nathan/cbl/github/tc-build/build/llvm/stage1/bin
clang-13: note: diagnostic msg: Error generating preprocessed source(s) - no
preprocessable inputs.
$ clang -fsanitize=object-size -mno-sse -O2 -c -o /dev/null rgrp.i
...
I bisected this down to
https://github.com/llvm/llvm-project/commit/54b64572407c8305c7bb8cc20c46a5e0c66b2979,
although that seems to be obvious because that pass was not run prior to that
commit.
The full preprocessed source and interestingness test can be viewed here:
https://github.com/nathanchance/creduce-files/tree/1abc3cbfdb5f52b1efc652c435fd3c17246df656/pgo-gfs2-crash
[1]:
https://git.kernel.org/next/linux-next/c/e1af496cbe9b4517428601a4e44fee3602dd3c15
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