a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
63 lines
1.7 KiB
Plaintext
63 lines
1.7 KiB
Plaintext
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fexceptions -o - %s | FileCheck %s
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// rdar://8409336
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struct TFENode {
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void GetURL() const;
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};
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@interface TNodeIconAndNameCell
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- (const TFENode&) node;
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@end
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@implementation TNodeIconAndNameCell
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- (const TFENode&) node {
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// CHECK: call dereferenceable({{[0-9]+}}) %struct.TFENode* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
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// CHECK-NEXT: call void @_ZNK7TFENode6GetURLEv(%struct.TFENode* %{{.*}})
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self.node.GetURL();
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} // expected-warning {{control reaches end of non-void function}}
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@end
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// rdar://8437240
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struct X {
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int x;
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};
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void f0(const X &parent);
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@interface A
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- (const X&) target;
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@end
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void f1(A *a) {
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// CHECK: [[PRP:%.*]] = call dereferenceable({{[0-9]+}}) %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
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// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* dereferenceable({{[0-9]+}}) [[PRP]])
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f0(a.target);
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// CHECK: [[MSG:%.*]] = call dereferenceable({{[0-9]+}}) %struct.X* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend
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// CHECK-NEXT:call void @_Z2f0RK1X(%struct.X* dereferenceable({{[0-9]+}}) [[MSG]])
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f0([a target]);
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}
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@interface Test2
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@property (readonly) int myProperty;
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- (int) myProperty;
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- (double) myGetter;
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@end
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void test2() {
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Test2 *obj;
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(void) obj.myProperty;
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(void) obj.myGetter;
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static_cast<void>(obj.myProperty);
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static_cast<void>(obj.myGetter);
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void(obj.myProperty);
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void(obj.myGetter);
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}
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// CHECK-LABEL: define void @_Z5test2v()
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// CHECK: call i32 bitcast
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// CHECK: call double bitcast
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// CHECK: call i32 bitcast
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// CHECK: call double bitcast
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// CHECK: call i32 bitcast
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// CHECK: call double bitcast
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// PR8751
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int test3(Test2 *obj) { return obj.myProperty; }
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