diff options
| author | Cameron Zwarich <zwarich@apple.com> | 2011-01-04 04:43:31 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-01-04 04:43:31 +0000 |
| commit | 95bb00414eba82cc1c058b558cd28bc28134c561 (patch) | |
| tree | 862b6bc3f22ea88af03e12438e8c79bb909511e4 /lib/Transforms | |
| parent | 70ecc97550635eec18d8c45577fc3ad24dcf8abc (diff) | |
Avoid finding loop back edges when we are not splitting critical edges in
CodeGenPrepare (which is the default behavior).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122801 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -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) { |