[PATCH] D115016: [CostModel][X86] Add i64 mul cost for avx as 1cy

[Haohai, Wen via Phabricator via llvm-commits]

HaohaiWen created this revision.
Herald added subscribers: pengfei, hiraditya.
HaohaiWen requested review of this revision.
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i64 mul cost is 1cy for most cpu that support avx. Currently all
x86 cpu uses i64 mul cost in X64 cost table represents a worst
case which is not true for most recent cpus.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115016

Files:
  llvm/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/X86/arith-fix.ll
  llvm/test/Analysis/CostModel/X86/arith-overflow.ll
  llvm/test/Analysis/CostModel/X86/arith.ll
  llvm/test/Analysis/CostModel/X86/mul.ll
  llvm/test/Analysis/CostModel/X86/rem.ll
  llvm/test/Transforms/SLPVectorizer/X86/arith-fix.ll
  llvm/test/Transforms/SLPVectorizer/X86/arith-mul.ll
  llvm/test/Transforms/SLPVectorizer/X86/powof2mul.ll

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