diff options
| -rw-r--r-- | llvm/lib/CodeGen/IfConversion.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/IfConversion.cpp b/llvm/lib/CodeGen/IfConversion.cpp index b05f6630ea7..3bddc771ab1 100644 --- a/llvm/lib/CodeGen/IfConversion.cpp +++ b/llvm/lib/CodeGen/IfConversion.cpp @@ -84,7 +84,7 @@ namespace { /// IsBrAnalyzable - True if AnalyzeBranch() returns false. /// HasFallThrough - True if BB may fallthrough to the following BB. /// IsUnpredicable - True if BB is known to be unpredicable. - /// ClobbersPredicate- True if BB would modify the predicate (e.g. has + /// ClobbersPred - True if BB could modify predicates (e.g. has /// cmp, call, etc.) /// NonPredSize - Number of non-predicated instructions. /// BB - Corresponding MachineBasicBlock. @@ -588,7 +588,10 @@ void IfConverter::ScanInstructions(BBInfo &BBI) { return; } - if (TID->Flags & M_CLOBBERS_PRED) + // FIXME: Make use of PredDefs? e.g. ADDC, SUBC sets predicates but are + // still potentially predicable. + std::vector<MachineOperand> PredDefs; + if (TII->DefinesPredicate(I, PredDefs)) BBI.ClobbersPred = true; if ((TID->Flags & M_PREDICABLE) == 0) { |
