77a0da926c
D43208 extracted `useEmulatedMaskMemRefHack()` from legality into cost model. What it essentially does is prevents scalarized vectorization of masked memory operations: ``` // TODO: Cost model for emulated masked load/store is completely // broken. This hack guides the cost model to use an artificially // high enough value to practically disable vectorization with such // operations, except where previously deployed legality hack allowed // using very low cost values. This is to avoid regressions coming simply // from moving "masked load/store" check from legality to cost model. // Masked Load/Gather emulation was previously never allowed. // Limited number of Masked Store/Scatter emulation was allowed. ``` While i don't really understand about what specifically `is completely broken` was talking about, i believe that at least on X86 with AVX2-or-later, this is no longer true. (or at least, i would like to know what is still broken). So i would like to follow suit after D111460, and like wise disable that hack for AVX2+. But since this was added for X86 specifically, let's just instead completely remove this hack. Reviewed By: RKSimon Differential Revision: https://reviews.llvm.org/D114779 |
||
|---|---|---|
| .. | ||
| AArch64 | ||
| AMDGPU | ||
| ARM | ||
| PowerPC | ||
| RISCV | ||
| SystemZ | ||
| X86 | ||
| free-intrinsics-datalayout.ll | ||
| free-intrinsics-no_info.ll | ||
| no_info.ll | ||