Clement Courbet
8171bd8e0f
[X86][Sched] Add zero idiom sched data to the SNB model.
Summary:
On SNB, renamer-based zeroing does not work for:
- 16 and 8-bit GPRs[1].
- MMX [2].
- ANDN variants [3]
[1] echo 'sub %ax, %ax' | /tmp/llvm-exegesis -mode=uops -snippets-file=-
[2] echo 'pxor %mm0, %mm0' | /tmp/llvm-exegesis -mode=uops -snippets-file=-
[3] echo 'andnps %xmm0, %xmm0' | /tmp/llvm-exegesis -mode=uops -snippets-file=-
Reviewers: RKSimon, andreadb
Subscribers: gbedwell, craig.topper, llvm-commits
Differential Revision: https://reviews.llvm.org/D52358
llvm-svn: 342736
2018-09-21 14:07:20 +00:00
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