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Revert: 156550 "ARM: peephole optimization to remove cmp instruction"

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This commit broke an external linux bot and gave a compile-time warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156556 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2012-05-10 18:49:43 +00:00
parent 148f392195
commit fe65d98dad
3 changed files with 27 additions and 161 deletions
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9
lib/CodeGen/PeepholeOptimizer.cpp
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@@ -31,15 +31,6 @@
// same flag that the "cmp" instruction sets and that "bz" uses, then we can
// eliminate the "cmp" instruction.
//
// Another instance, in this code:
//
// sub r1, r3 | sub r1, imm
// cmp r3, r1 or cmp r1, r3 | cmp r1, imm
// bge L1
//
// If the branch instruction can use flag from "sub", then we can replace
// "sub" with "subs" and eliminate the "cmp" instruction.
//
// - Optimize Bitcast pairs:
//
// v1 = bitcast v0