diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-01-03 07:25:26 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-03 07:25:26 +0000 |
| commit | 3d73bce2d01c7537042bb214edb5fc597f07bf74 (patch) | |
| tree | 00c12eee5788657b4eeeac62f8f91c00c7090583 /lib/Transforms/Utils/SimplifyCFG.cpp | |
| parent | 76327d9cf598a17eb69ea928ca43fbacb6cc535e (diff) | |
don't hoist FP additions into unconditional adds + selects. This
could theoretically introduce a trap, but is also a performance issue.
This speeds up ptrdist/ks by 8%.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45533 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index b838f94b79..f19adbd263 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -372,6 +372,8 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB, case Instruction::AShr: case Instruction::ICmp: case Instruction::FCmp: + if (I->getOperand(0)->getType()->isFPOrFPVector()) + return false; // FP arithmetic might trap. break; // These are all cheap and non-trapping instructions. } |