diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopUnroll.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/LoopUnroll.cpp b/lib/Transforms/Scalar/LoopUnroll.cpp index 71a5955b76..1962c14d5d 100644 --- a/lib/Transforms/Scalar/LoopUnroll.cpp +++ b/lib/Transforms/Scalar/LoopUnroll.cpp @@ -101,6 +101,10 @@ static unsigned ApproximateLoopSize(const Loop *L) { } else if (isa<DbgInfoIntrinsic>(I)) { // Ignore debug instructions } else if (isa<CallInst>(I)) { + // Estimate size overhead introduced by call instructions which + // is higher than other instructions. Here 3 and 10 are magic + // numbers that help one isolated test case from PR2067 without + // negatively impacting measured benchmarks. if (isa<IntrinsicInst>(I)) Size = Size + 3; else |