Split SelectionDAGISel::IsLegalAndProfitableToFold to
IsLegalToFold and IsProfitableToFold. The generic version of the later simply checks whether the folding candidate has a single use.
This allows the target isel routines more flexibility in deciding whether folding makes sense. The specific case we are interested in is folding constant pool loads with multiple uses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96255 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/PIC16ISelLowering.cpp b/lib/Target/PIC16/PIC16ISelLowering.cpp
index 92b5c7b..d2fc8db 100644
--- a/lib/Target/PIC16/PIC16ISelLowering.cpp
+++ b/lib/Target/PIC16/PIC16ISelLowering.cpp
@@ -1513,8 +1513,7 @@
// Direct load operands are folded in binary operations. But before folding
// verify if this folding is legal. Fold only if it is legal otherwise
// convert this direct load to a separate memory operation.
- if(ISel->IsLegalAndProfitableToFold(Op.getOperand(0).getNode(),
- Op.getNode(), Op.getNode()))
+ if(ISel->IsLegalToFold(Op.getOperand(0), Op.getNode(), Op.getNode()))
return false;
else
MemOp = 0;