nathanchance added a comment.
I ended up reducing something down anyways. At the parent commit of
dc969061c68e62328607d68215ed8b9ef4a1e4b1
<https://reviews.llvm.org/rGdc969061c68e62328607d68215ed8b9ef4a1e4b1>, there is
no crash.
_Bool fpsimd_context_busy;
enum { false, true } arch_static_branch_jump() {
asm goto("" : : : : l_yes);
return false;
l_yes:
return true;
}
_Bool __preempt_count_dec_and_test();
void preempt_schedule_notrace();
long __percpu_read_8();
_Bool may_use_simd() {
return ({ ({ arch_static_branch_jump(); }); }) && ({
typeof(fpsimd_context_busy) pscr_ret__ = ({
typeof(fpsimd_context_busy) __retval = __percpu_read_8();
if (__builtin_expect(__preempt_count_dec_and_test(), 0))
preempt_schedule_notrace();
__retval;
});
pscr_ret__;
});
}
void aes_cipher_encrypt() {
if (may_use_simd())
preempt_schedule_notrace();
}
$ clang --target=aarch64-linux-gnu -O2 -c -o /dev/null aes-ce-glue.i
clang:
/home/nathan/cbl/src/llvm-project/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp:1136:
llvm::BasicBlock *SplitBlockPredecessorsImpl(llvm::BasicBlock *,
ArrayRef<llvm::BasicBlock *>, const char *, llvm::DomTreeUpdater *,
llvm::DominatorTree *, llvm::LoopInfo *, llvm::MemorySSAUpdater *, bool):
Assertion `!isa<CallBrInst>(Preds[i]->getTerminator()) && "Cannot split an edge
from a CallBrInst"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/
and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang --target=aarch64-linux-gnu -O2 -c -o
/dev/null aes-ce-glue.i
1. <eof> parser at end of file
2. Optimizer
#0 0x0000aaaad1ad36b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/home/nathan/tmp/install/llvm/dc969061c68e62328607d68215ed8b9ef4a1e4b1/bin/clang-15+0x35336b8)
#1 0x0000aaaad1ad18d8 llvm::sys::RunSignalHandlers()
(/home/nathan/tmp/install/llvm/dc969061c68e62328607d68215ed8b9ef4a1e4b1/bin/clang-15+0x35318d8)
#2 0x0000aaaad1a5e6e4 (anonymous
namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long)
CrashRecoveryContext.cpp:0:0
#3 0x0000aaaad1a5e894 CrashRecoverySignalHandler(int)
CrashRecoveryContext.cpp:0:0
#4 0x0000ffffa099e854 (linux-vdso.so.1+0x854)
#5 0x0000ffffa04b28a8 __pthread_kill_implementation
(/lib64/libc.so.6+0x828a8)
#6 0x0000ffffa046ae40 gsignal (/lib64/libc.so.6+0x3ae40)
#7 0x0000ffffa04572f8 abort (/lib64/libc.so.6+0x272f8)
#8 0x0000ffffa0464538 __assert_fail_base (/lib64/libc.so.6+0x34538)
#9 0x0000ffffa04645a0 __assert_perror_fail (/lib64/libc.so.6+0x345a0)
#10 0x0000aaaad1ae30c0 SplitBlockPredecessorsImpl(llvm::BasicBlock*,
llvm::ArrayRef<llvm::BasicBlock*>, char const*, llvm::DomTreeUpdater*,
llvm::DominatorTree*, llvm::LoopInfo*, llvm::MemorySSAUpdater*, bool)
BasicBlockUtils.cpp:0:0
...
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D124159/new/
https://reviews.llvm.org/D124159
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