ir-gen for --/++ operators of objc object pointers
in 32bit abi.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76109 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 0316116..8103506 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -690,7 +690,25 @@
llvm::Constant *Inc =
VMContext.getConstantInt(llvm::Type::Int32Ty, AmountVal);
if (!isa<llvm::FunctionType>(PT->getElementType())) {
- NextVal = Builder.CreateGEP(InVal, Inc, "ptrincdec");
+ QualType PTEE = ValTy->getPointeeType();
+ if (const ObjCInterfaceType *OIT =
+ dyn_cast<ObjCInterfaceType>(PTEE)) {
+ // Handle interface types, which are not represented with a concrete type.
+ int size = CGF.getContext().getTypeSize(OIT) / 8;
+ if (!isInc)
+ size = -size;
+ Inc = VMContext.getConstantInt(Inc->getType(), size);
+ const llvm::Type *i8Ty =
+ VMContext.getPointerTypeUnqual(llvm::Type::Int8Ty);
+ InVal = Builder.CreateBitCast(InVal, i8Ty);
+ NextVal = Builder.CreateGEP(InVal, Inc, "add.ptr");
+ llvm::Value *lhs = LV.getAddress();
+ lhs = Builder.CreateBitCast(lhs, VMContext.getPointerTypeUnqual(i8Ty));
+ LV = LValue::MakeAddr(lhs, ValTy.getCVRQualifiers(),
+ CGF.getContext().getObjCGCAttrKind(ValTy));
+ }
+ else
+ NextVal = Builder.CreateGEP(InVal, Inc, "ptrincdec");
} else {
const llvm::Type *i8Ty =
VMContext.getPointerTypeUnqual(llvm::Type::Int8Ty);
diff --git a/test/CodeGenObjC/object-incr-decr-1.m b/test/CodeGenObjC/object-incr-decr-1.m
new file mode 100644
index 0000000..96c2182
--- /dev/null
+++ b/test/CodeGenObjC/object-incr-decr-1.m
@@ -0,0 +1,19 @@
+// RUN: clang-cc -triple i386-apple-darwin9 -fnext-runtime -emit-llvm %s
+
+@interface Foo
+{
+ double d1,d3,d4;
+}
+@end
+
+Foo* foo()
+{
+ Foo *f;
+
+ // Both of these crash clang nicely
+ ++f;
+ --f;
+ f--;
+ f++;
+ return f;
+}