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Do not unswitch if the function notes say we're optimizing this function for size.

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llvm-svn: 55786
This commit is contained in:
Devang Patel 2008-09-04 18:55:13 +00:00
parent 4523deb38b
commit c96f319a3c
1 changed files with 7 additions and 1 deletions
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8
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -417,6 +417,13 @@ unsigned LoopUnswitch::getLoopUnswitchCost(Value *LIC) {
/// LoopCond == Val to simplify the loop. If we decide that this is profitable,
/// unswitch the loop, reprocess the pieces, then return true.
bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){
Function *F = loopHeader->getParent();
// Do not unswitch if the function is optimized for size.
if (F->getNotes() & FN_NOTE_OptimizeForSize)
return false;
// Check to see if it would be profitable to unswitch current loop.
unsigned Cost = getLoopUnswitchCost(LoopCond);
@ -445,7 +452,6 @@ bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){
}
// FIXME: Reconstruct dom info, because it is not preserved properly.
Function *F = loopHeader->getParent();
if (DT)
DT->runOnFunction(*F);
if (DF)