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
82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fexceptions -o - %s | FileCheck %s
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// Copy constructor
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struct X0 {
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X0();
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X0(const X0 &) throw();
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X0(X0 &);
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};
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struct X1 {
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X1();
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X1(const X1 &) throw();
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};
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struct X2 : X1 {
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X2();
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};
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struct X3 : X0, X1 {
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X3();
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};
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struct X4 {
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X4(X4 &) throw();
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};
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struct X5 : X0, X4 { };
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void test(X2 x2, X3 x3, X5 x5) {
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// CHECK: define linkonce_odr void @_ZN2X2C1ERKS_(%struct.X2* %this, %struct.X2* dereferenceable({{[0-9]+}})) unnamed_addr
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// CHECK: call void @_ZN2X2C2ERKS_({{.*}}) [[NUW:#[0-9]+]]
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// CHECK-NEXT: ret void
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// CHECK-NEXT: }
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X2 x2a(x2);
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// CHECK: define linkonce_odr void @_ZN2X3C1ERKS_(%struct.X3* %this, %struct.X3* dereferenceable({{[0-9]+}})) unnamed_addr
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// CHECK: call void @_ZN2X3C2ERKS_({{.*}}) [[NUW]]
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// CHECK-NEXT: ret void
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// CHECK-NEXT: }
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X3 x3a(x3);
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// CHECK: define linkonce_odr void @_ZN2X5C1ERS_({{.*}}) unnamed_addr
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// CHECK-NOT: call void @__cxa_call_unexpected
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// CHECK: ret void
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X5 x5a(x5);
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}
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// Default constructor
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struct X6 {
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X6() throw();
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};
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struct X7 {
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X7();
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};
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struct X8 : X6 { };
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struct X9 : X6, X7 { };
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void test() {
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// CHECK: define linkonce_odr void @_ZN2X8C1Ev(%struct.X8* %this) unnamed_addr
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// CHECK: call void @_ZN2X8C2Ev({{.*}}) [[NUW]]
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// CHECK-NEXT: ret void
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X8();
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// CHECK: define linkonce_odr void @_ZN2X9C1Ev(%struct.X9* %this) unnamed_addr
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// FIXME: check that this is the end of the line here:
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// CHECK: call void @_ZN2X9C2Ev({{.*}})
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// CHECK-NEXT: ret void
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X9();
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// CHECK: define linkonce_odr void @_ZN2X9C2Ev(%struct.X9* %this) unnamed_addr
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// CHECK: call void @_ZN2X6C2Ev({{.*}}) [[NUW]]
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// FIXME: and here:
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// CHECK-NEXT: bitcast
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// CHECK-NEXT: call void @_ZN2X7C2Ev({{.*}})
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// CHECK: ret void
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// CHECK: define linkonce_odr void @_ZN2X8C2Ev(%struct.X8* %this) unnamed_addr
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// CHECK: call void @_ZN2X6C2Ev({{.*}}) [[NUW]]
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// CHECK-NEXT: ret void
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}
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// CHECK: attributes [[NUW]] = { nounwind{{.*}} }
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