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Teach ProcessImplicitDefs to transform more COPY instructions into IMPLICIT_DEF (and subsequently eliminate them). This allows machine LICM to hoist IMPLICIT_DEF's. PR7620.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108304 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng
2010-07-14 01:22:19 +00:00
parent 9e82bf12a0
commit db89809037
4 changed files with 47 additions and 22 deletions
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test/CodeGen/X86/2009-02-26-MachineLICMBug.ll
+1 -1
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@@ -1,4 +1,4 @@
; RUN: llc < %s -march=x86-64 -mattr=+sse3 -stats |& grep {2 machine-licm}
; RUN: llc < %s -march=x86-64 -mattr=+sse3 -stats |& grep {7 machine-licm}
; RUN: llc < %s -march=x86-64 -mattr=+sse3 | FileCheck %s
; rdar://6627786
; rdar://7792037