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Fix machine-cp by having it to check sub-register indicies. e.g.

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ecx = mov eax
al  = mov ch
The second copy is not a nop because the sub-indices of ecx,ch is not the
same of that of eax/al.

Re-enabled machine-cp.
PR11940


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151002 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2012-02-20 23:28:17 +00:00
parent acb6f5096f
commit 01b623c8c2
4 changed files with 105 additions and 4 deletions
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2
test/CodeGen/X86/machine-cp.ll
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@@ -1,4 +1,4 @@
; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s -disable-copyprop=false | FileCheck %s
; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s
; After tail duplication, two copies in an early exit BB can be cancelled out.
; rdar://10640363