diff options
Diffstat (limited to 'lib/Transforms/Scalar/CodeGenPrepare.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/CodeGenPrepare.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp index f4edcc76ec..8df0b3ce47 100644 --- a/lib/Transforms/Scalar/CodeGenPrepare.cpp +++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp @@ -119,8 +119,10 @@ bool CodeGenPrepare::runOnFunction(Function &F) { // unconditional branch. EverMadeChange |= EliminateMostlyEmptyBlocks(F); - // Now find loop back edges. - findLoopBackEdges(F); + // Now find loop back edges, but only if they are being used to decide which + // critical edges to split. + if (CriticalEdgeSplit) + findLoopBackEdges(F); bool MadeChange = true; while (MadeChange) { |