Prefer bitcast+GEP over ptrtoint+sub+inttoptr: it's semantically equivalent here, and generally nicer to the optimizer.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGClass.cpp b/lib/CodeGen/CGClass.cpp
index b9abbf2..e3b5777 100644
--- a/lib/CodeGen/CGClass.cpp
+++ b/lib/CodeGen/CGClass.cpp
@@ -249,9 +249,9 @@
}
// Apply the offset.
- Value = Builder.CreatePtrToInt(Value, NonVirtualOffset->getType());
- Value = Builder.CreateSub(Value, NonVirtualOffset);
- Value = Builder.CreateIntToPtr(Value, DerivedPtrTy);
+ Value = Builder.CreateBitCast(Value, Int8PtrTy);
+ Value = Builder.CreateGEP(Value, Builder.CreateNeg(NonVirtualOffset),
+ "sub.ptr");
// Just cast.
Value = Builder.CreateBitCast(Value, DerivedPtrTy);
