[all-commits] [llvm/llvm-project] ad171d: [X86] Change the tuning settings for pentium4 to b...

[topperc via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ad171d24b92d8cf1a9e64567af74cea353b5bf5b
      https://github.com/llvm/llvm-project/commit/ad171d24b92d8cf1a9e64567af74cea353b5bf5b
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-07-16 (Thu, 16 Jul 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86.td
    M llvm/test/CodeGen/X86/cfguard-x86-vectorcall.ll
    M llvm/test/CodeGen/X86/slow-unaligned-mem.ll
    M llvm/test/DebugInfo/COFF/fpo-shrink-wrap.ll
    M llvm/test/DebugInfo/COFF/types-array.ll

  Log Message:
  -----------
  [X86] Change the tuning settings for pentium4 to be more modern since its the default 32-bit cpu in clang

Alternative to D83897. I believe the big change here is that I removed slow unaligned memory 16

Down side that it may adversely effect tuning if someone explicitly targets -march=pentium4 and expects pentium4 tuned code. Of course pentium4 is so old our default behavior with the previous settings may not have been the best either.

Reviewed By: echristo, RKSimon

Differential Revision: https://reviews.llvm.org/D83913