Add missing function CreateFPCast to the TargetFolder. It's there in the other

folders and not having it here fails to compile if you actually try to use it.

Also, CreatePointerCast was failing to do the part where it does TD-aware
constant folding. Granted there is exactly one case where that it will ever
do anything, but there's no reason to skip it. For reference, that case is a
subtraction between two constant offsets on the same global variable, eg.,
"&A[123] - &A[4].f".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164760 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 1 deletions

diff --git a/include/llvm/Support/TargetFolder.h b/include/llvm/Support/TargetFolder.h
index c65faa6621..a02db2fe66 100644
--- a/include/llvm/Support/TargetFolder.h
+++ b/include/llvm/Support/TargetFolder.h
@@ -177,7 +177,14 @@ public:
     return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
   }
   Constant *CreatePointerCast(Constant *C, Type *DestTy) const {
-    return ConstantExpr::getPointerCast(C, DestTy);
+    if (C->getType() == DestTy)
+      return C; // avoid calling Fold
+    return Fold(ConstantExpr::getPointerCast(C, DestTy));
+  }
+  Constant *CreateFPCast(Constant *C, Type *DestTy) const {
+    if (C->getType() == DestTy)
+      return C; // avoid calling Fold
+    return Fold(ConstantExpr::getFPCast(C, DestTy));
   }
   Constant *CreateBitCast(Constant *C, Type *DestTy) const {
     return CreateCast(Instruction::BitCast, C, DestTy);