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https://github.com/Gericom/teak-llvm.git
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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
56 lines
1.1 KiB
C++
56 lines
1.1 KiB
C++
// RUN: %clang_cc1 -emit-llvm -triple x86_64-apple-darwin10.0.0 -o - %s | FileCheck %s
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struct A {
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A &operator=(const A&);
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A &operator=(A&);
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};
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struct B {
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B &operator=(B&);
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};
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struct C {
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virtual C& operator=(const C&);
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};
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struct POD {
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int array[3][4];
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};
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struct CopyByValue {
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CopyByValue(const CopyByValue&);
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CopyByValue &operator=(CopyByValue);
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};
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struct D : A, B, virtual C {
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int scalar;
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int scalar_array[2][3];
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B class_member;
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C class_member_array[2][3];
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POD pod_array[2][3];
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union {
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int x;
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float f[3];
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};
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CopyByValue by_value;
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};
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void test_D(D d1, D d2) {
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d1 = d2;
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}
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// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.D* @_ZN1DaSERS_
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// CHECK: {{call.*_ZN1AaSERS_}}
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// CHECK: {{call.*_ZN1BaSERS_}}
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// CHECK: {{call.*_ZN1CaSERKS_}}
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// CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 28}}
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// CHECK: {{call.*_ZN1BaSERS_}}
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// CHECK: br
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// CHECK: {{call.*_ZN1CaSERKS_}}
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// CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 288}}
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// CHECK: {{call void @llvm.memcpy.p0i8.p0i8.i64.*i64 12}}
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// CHECK: call void @_ZN11CopyByValueC1ERKS_
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// CHECK: {{call.*_ZN11CopyByValueaSES_}}
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// CHECK: ret
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