diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/IfConversion.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/IfConversion.cpp b/llvm/lib/CodeGen/IfConversion.cpp index 2395f32061d..b8799a563fc 100644 --- a/llvm/lib/CodeGen/IfConversion.cpp +++ b/llvm/lib/CodeGen/IfConversion.cpp @@ -726,6 +726,12 @@ bool IfConverter::FeasibilityAnalysis(BBInfo &BBI, if (BBI.IsDone || BBI.IsUnpredicable) return false; + // If it is already predicated but we couldn't analyze its terminator, the + // latter might fallthrough, but we can't determine where to. + // Conservatively avoid if-converting again. + if (BBI.Predicate.size() && !BBI.IsBrAnalyzable) + return false; + // If it is already predicated, check if the new predicate subsumes // its predicate. if (BBI.Predicate.size() && !TII->SubsumesPredicate(Pred, BBI.Predicate)) |
