diff options
Diffstat (limited to 'lib/CodeGen/IfConversion.cpp')
| -rw-r--r-- | lib/CodeGen/IfConversion.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp index c0c6b383e6..9a35d1d11e 100644 --- a/lib/CodeGen/IfConversion.cpp +++ b/lib/CodeGen/IfConversion.cpp @@ -237,6 +237,9 @@ void IfConverter::StructuralAnalysis(MachineBasicBlock *BB) { !TII->AnalyzeBranch(*BB, BBI.TrueBB, BBI.FalseBB, BBI.BrCond); if (!BBI.IsAnalyzable || BBI.BrCond.size() == 0) return; + // Do not ifcvt if either path is a back edge to the entry block. + if (BBI.TrueBB == BB || BBI.FalseBB == BB) + return; StructuralAnalysis(BBI.TrueBB); BBInfo &TrueBBI = BBAnalysis[BBI.TrueBB->getNumber()]; |