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| author | Tanya Lattner <tonic@nondot.org> | 2009-01-27 22:34:30 +0000 |
|---|---|---|
| committer | Tanya Lattner <tonic@nondot.org> | 2009-01-27 22:34:30 +0000 |
| commit | fbb018133766f9af2195b802be8fda780e5c2cec (patch) | |
| tree | 40859748012f32f176525df03e56ab8468a2af2d /lib/CodeGen/StackProtector.cpp | |
| parent | cdc2f05f72ca7a66ca6b33e2817b03ad14083c13 (diff) | |
Merge from mainline.
Don't create ISD::FNEG nodes after legalize if they aren't legal.
Simplify x+0 to x in unsafe-fp-math mode. This avoids a bunch of
redundant work in many cases, because in unsafe-fp-math mode,
ISD::FADD with a constant is considered free to negate, so the
DAGCombiner often negates x+0 to -0-x thinking it's free, when
in reality the end result is -x, which is more expensive than x.
Also, combine x*0 to 0.
This fixes PR3374.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_25@63144 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/StackProtector.cpp')
0 files changed, 0 insertions, 0 deletions