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Fix typo in code to cap the loop code size reduction calculation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113526 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2010-09-09 19:08:59 +00:00
parent 6add2fbb69
commit 20672e48b3
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/LoopUnrollPass.cpp
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@ -27,7 +27,7 @@
using namespace llvm;
static cl::opt<unsigned>
UnrollThreshold("unroll-threshold", cl::init(200), cl::Hidden,
UnrollThreshold("unroll-threshold", cl::init(0), cl::Hidden,
cl::desc("The cut-off point for automatic loop unrolling"));
static cl::opt<unsigned>
@ -105,7 +105,7 @@ static unsigned ApproximateLoopSize(const Loop *L, unsigned &NumCalls) {
unsigned SizeDecrease = Metrics.CountCodeReductionForConstant(IndVar);
// NOTE: Because SizeDecrease is a fuzzy estimate, we don't want to allow
// it to totally negate the cost of unrolling a loop.
SizeDecrease = SizeDecrease > LoopSize / 2 ? LoopSize : SizeDecrease;
SizeDecrease = SizeDecrease > LoopSize / 2 ? LoopSize / 2 : SizeDecrease;
}
// Don't allow an estimate of size zero. This would allows unrolling of loops