Revert r113439, which relaxed the requirement that loops containing calls cannot be unrolled. After some discussion,
there seems to be a better way to achieve the same effect.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113528 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnrollPass.cpp b/lib/Transforms/Scalar/LoopUnrollPass.cpp
index 4d23178..7968939 100644
--- a/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ b/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -155,10 +155,8 @@
unsigned LoopSize = ApproximateLoopSize(L, NumCalls);
DEBUG(dbgs() << " Loop Size = " << LoopSize << "\n");
if (NumCalls != 0) {
- // Even for a loop that contains calls, it can still be profitable to
- // unroll if the loop is really, REALLY small.
- DEBUG(dbgs() <<" Using lower threshold for loop with function calls.\n");
- CurrentThreshold = OptSizeUnrollThreshold;
+ DEBUG(dbgs() << " Not unrolling loop with function calls.\n");
+ return false;
}
uint64_t Size = (uint64_t)LoopSize*Count;
if (TripCount != 1 && Size > CurrentThreshold) {