| Issue |
181865
|
| Summary |
Stack misalignment while executing SSE code
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
MIvanchev
|
Void Linux, x64 bit, latest LLVM, 32-bit executable initializing Mesa, segfaulting with:
```
#0 0xeeb9eefe in llvm::xxh3_64bits(llvm::ArrayRef<unsigned char>) () from /usr/lib32/libLLVM.so.21.1
#1 0xeeb45426 in llvm::StringMapImpl::hash(llvm::StringRef) () from /usr/lib32/libLLVM.so.21.1
#2 0xeead3031 in ?? () from /usr/lib32/libLLVM.so.21.1
#3 0xeeac32d9 in llvm::cl::Option::addArgument() () from /usr/lib32/libLLVM.so.21.1
```
Likely due to misaligned stack, stack is aligned in the caller `hash`. Likely due to misaligned stack
```
=> 0xeeb9eefe <_ZN4llvm11xxh3_64bitsENS_8ArrayRefIhEE+430>: movdqa XMMWORD PTR [esp+0x20],xmm0
0xeeb9ef04 <_ZN4llvm11xxh3_64bitsENS_8ArrayRefIhEE+436>: punpckldq xmm0,xmm4
0xeeb9ef08 <_ZN4llvm11xxh3_64bitsENS_8ArrayRefIhEE+440>: movdqa xmm5,xmm1
0xeeb9ef0c <_ZN4llvm11xxh3_64bitsENS_8ArrayRefIhEE+444>: punpcklqdq xmm5,xmm0
$esp = (void *) 0xffffbeb4
```
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