rnk added a comment.
This change appears to have caused some blink vector math unit tests to fail on
Windows. We are tracking it at https://crbug.com/849251.
It has a pretty small reproducer:
#include <immintrin.h>
__m256 loadit(__m256 *p) { return _mm256_loadu_ps((const float *)p); }
Compile for x86_64-windows-msvc with -mavx, and before this change we got this
IR: `%0 = load <8 x float>, <8 x float>* %p, align 1`
After we get this IR: `%0 = load <8 x float>, <8 x float>* %p, align 32`
This is surprising. I'll keep debugging.
Repository:
rC Clang
https://reviews.llvm.org/D46042
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