// Apply the offset.
llvm::Value *Value = Builder.CreateBitCast(BaseAddr.getPointer(), Int8PtrTy);
- Value = Builder.CreateGEP(Value, Builder.CreateNeg(NonVirtualOffset),
- "sub.ptr");
+ Value = Builder.CreateInBoundsGEP(Value, Builder.CreateNeg(NonVirtualOffset),
+ "sub.ptr");
// Just cast.
Value = Builder.CreateBitCast(Value, DerivedPtrTy);
void downcast_pointer(B *b) {
(void) static_cast<C*>(b);
// Alignment check from EmitTypeCheck(TCK_DowncastPointer, ...)
- // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr i8, i8* {{.*}}, i64 -16
+ // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16
// CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
// null check goes here
// CHECK: [[FROM_PHI:%.+]] = phi %class.C* [ [[C]], {{.*}} ], {{.*}}
void downcast_reference(B &b) {
(void) static_cast<C&>(b);
// Alignment check from EmitTypeCheck(TCK_DowncastReference, ...)
- // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr i8, i8* {{.*}}, i64 -16
+ // CHECK: [[SUB:%[.a-z0-9]*]] = getelementptr inbounds i8, i8* {{.*}}, i64 -16
// CHECK-NEXT: [[C:%.+]] = bitcast i8* [[SUB]] to %class.C*
// Objectsize check goes here
// CHECK: [[C_INT:%.+]] = ptrtoint %class.C* [[C]] to i64
--- /dev/null
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
+
+class A {
+ int a;
+};
+
+class B {
+ int b;
+public:
+ A *getAsA();
+};
+
+class X : public A, public B {
+ int x;
+};
+
+// PR35909 - https://bugs.llvm.org/show_bug.cgi?id=35909
+
+A *B::getAsA() {
+ return static_cast<X*>(this);
+
+ // CHECK-LABEL: define %class.A* @_ZN1B6getAsAEv
+ // CHECK: %[[THIS:.*]] = load %class.B*, %class.B**
+ // CHECK-NEXT: %[[BC:.*]] = bitcast %class.B* %[[THIS]] to i8*
+ // CHECK-NEXT: getelementptr inbounds i8, i8* %[[BC]], i64 -4
+}
+