[PATCH] D17573: [X86] PR26554: Enable using of true long nops for x86-64 for every CPU

[Andrey Turetskiy via llvm-commits]

aturetsk created this revision.
aturetsk added reviewers: nadav, ddunbar.
aturetsk added a subscriber: llvm-commits.

Alternative nops added in http://reviews.llvm.org/D14178 are not actually nops in x86-64. However all 64 bit CPUs support true long nops.
This patch makes AsmBackend to use true long nops for x86-64 regardless of selected CPU.

Ref: https://llvm.org/bugs/show_bug.cgi?id=26554

http://reviews.llvm.org/D17573

Files:
  lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
  test/MC/X86/x86_long_nop.s

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