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Respect the -tail-dup-size command line option even when optimizing for size.

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This is similar to the -unroll-threshold option. There should be no change in
behavior when -tail-dup-size is not explicit on the llc command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124564 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-01-30 20:38:12 +00:00
parent 7af00c0f6e
commit 8352062e52
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/TailDuplication.cpp
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@ -459,7 +459,8 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF,
// duplicate only one, because one branch instruction can be eliminated to
// compensate for the duplication.
unsigned MaxDuplicateCount;
if (MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
if (TailDuplicateSize.getNumOccurrences() == 0 &&
MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
MaxDuplicateCount = 1;
else
MaxDuplicateCount = TailDuplicateSize;