[all-commits] [llvm/llvm-project] d2c093: [CostModel][X86] Add i64 mul cost for avx512 as 1cy

[HaohaiWen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d2c093e79d146f837ce0117f9b331e9e4508d2cf
      https://github.com/llvm/llvm-project/commit/d2c093e79d146f837ce0117f9b331e9e4508d2cf
  Author: Haohai Wen <haohai.wen at intel.com>
  Date:   2021-12-08 (Wed, 08 Dec 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/arith-fix.ll
    M llvm/test/Analysis/CostModel/X86/arith-overflow.ll
    M llvm/test/Analysis/CostModel/X86/arith.ll
    M llvm/test/Analysis/CostModel/X86/mul.ll
    M llvm/test/Analysis/CostModel/X86/rem.ll

  Log Message:
  -----------
  [CostModel][X86] Add i64 mul cost for avx512 as 1cy

i64 mul cost is 1cy for all cpu that support avx512. Currently
all X86 cpu uses i64 mul cost in X64 cost table which is not
true for cpu that support avx512 (skx, icx).

Reviewed By: pengfei, RKSimon

Differential Revision: https://reviews.llvm.org/D115016