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
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
// RUN: %clang_cc1 -triple i686-pc-mingw32 -fms-extensions -Wmicrosoft %s -emit-llvm -o - | FileCheck %s
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class Test1 {
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public:
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int a;
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};
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void f1() {
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Test1 var;
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var.Test1::Test1();
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %{{.*}}, i8* %{{.*}}, i32 4, i32 4, i1 false)
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var.Test1::Test1(var);
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}
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class Test2 {
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public:
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Test2() { a = 10; b = 10; }
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int a;
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int b;
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};
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void f2() {
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// CHECK: %var = alloca %class.Test2, align 4
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// CHECK-NEXT: call x86_thiscallcc void @_ZN5Test2C1Ev(%class.Test2* %var)
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Test2 var;
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// CHECK-NEXT: call x86_thiscallcc void @_ZN5Test2C1Ev(%class.Test2* %var)
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var.Test2::Test2();
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %{{.*}}, i8* %{{.*}}, i32 8, i32 4, i1 false)
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var.Test2::Test2(var);
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}
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class Test3 {
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public:
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Test3() { a = 10; b = 15; c = 20; }
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Test3(const Test3& that) { a = that.a; b = that.b; c = that.c; }
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int a;
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int b;
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int c;
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};
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void f3() {
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// CHECK: call x86_thiscallcc void @_ZN5Test3C1Ev(%class.Test3* %var)
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Test3 var;
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// CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1Ev(%class.Test3* %var2)
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Test3 var2;
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// CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1Ev(%class.Test3* %var)
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var.Test3::Test3();
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// CHECK-NEXT: call x86_thiscallcc void @_ZN5Test3C1ERKS_(%class.Test3* %var, %class.Test3* dereferenceable({{[0-9]+}}) %var2)
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var.Test3::Test3(var2);
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}
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