121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
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// RUN: %clang_cc1 -std=c++11 -S -triple armv7-none-eabi -fmerge-all-constants -emit-llvm -o - %s | FileCheck %s
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// This creates and lifetime-extends a 'const char[5]' temporary.
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// CHECK: @_ZGR19extended_string_ref_ = internal constant [5 x i8] c"hi\00\00\00",
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// CHECK: @extended_string_ref ={{.*}} constant [5 x i8]* @_ZGR19extended_string_ref_,
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const char (&extended_string_ref)[5] = {"hi"};
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// This binds directly to a string literal object.
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// CHECK: @nonextended_string_ref ={{.*}} constant [3 x i8]* @.str
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const char (&nonextended_string_ref)[3] = {"hi"};
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namespace reference {
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struct A {
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int i1, i2;
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};
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void single_init() {
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// No superfluous instructions allowed here, they could be
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// hiding extra temporaries.
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// CHECK: store i32 1, i32*
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// CHECK-NEXT: store i32* %{{.*}}, i32**
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const int &cri2a = 1;
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// CHECK-NEXT: store i32 1, i32*
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// CHECK-NEXT: store i32* %{{.*}}, i32**
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const int &cri1a = {1};
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// CHECK-NEXT: store i32 1, i32*
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int i = 1;
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// CHECK-NEXT: store i32* %{{.*}}, i32**
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int &ri1a = {i};
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// CHECK-NEXT: bitcast
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// CHECK-NEXT: memcpy
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A a{1, 2};
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// CHECK-NEXT: store %{{.*}}* %{{.*}}, %{{.*}}** %
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A &ra1a = {a};
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using T = A&;
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// CHECK-NEXT: store %{{.*}}* %{{.*}}, %{{.*}}** %
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A &ra1b = T{a};
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// CHECK-NEXT: ret
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}
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void reference_to_aggregate(int i) {
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// CHECK: getelementptr {{.*}}, i32 0, i32 0
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// CHECK-NEXT: store i32 1
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// CHECK-NEXT: getelementptr {{.*}}, i32 0, i32 1
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// CHECK-NEXT: %[[I1:.*]] = load i32, i32*
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// CHECK-NEXT: store i32 %[[I1]]
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// CHECK-NEXT: store %{{.*}}* %{{.*}}, %{{.*}}** %{{.*}}, align
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const A &ra1{1, i};
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// CHECK-NEXT: getelementptr inbounds [3 x i32], [3 x i32]* %{{.*}}, i{{32|64}} 0, i{{32|64}} 0
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// CHECK-NEXT: store i32 1
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// CHECK-NEXT: getelementptr inbounds i32, i32* %{{.*}}, i{{32|64}} 1
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// CHECK-NEXT: store i32 2
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// CHECK-NEXT: getelementptr inbounds i32, i32* %{{.*}}, i{{32|64}} 1
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// CHECK-NEXT: %[[I2:.*]] = load i32, i32*
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// CHECK-NEXT: store i32 %[[I2]]
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// CHECK-NEXT: store [3 x i32]* %{{.*}}, [3 x i32]** %{{.*}}, align
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const int (&arrayRef)[] = {1, 2, i};
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// CHECK: store %{{.*}}* @{{.*}}, %{{.*}}** %{{.*}}, align
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const A &constra1{1, 2};
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// CHECK-NEXT: store [3 x i32]* @{{.*}}, [3 x i32]** %{{.*}}, align
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const int (&constarrayRef)[] = {1, 2, 3};
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// CHECK-NEXT: ret
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}
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struct B {
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B();
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~B();
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};
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void single_init_temp_cleanup()
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{
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// Ensure lifetime extension.
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// CHECK: call %"struct.reference::B"* @_ZN9reference1BC1Ev
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// CHECK-NEXT: store %{{.*}}* %{{.*}}, %{{.*}}** %
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const B &rb{ B() };
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// CHECK: call %"struct.reference::B"* @_ZN9reference1BD1Ev
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}
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}
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namespace PR23165 {
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struct AbstractClass {
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virtual void foo() const = 0;
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};
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struct ChildClass : public AbstractClass {
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virtual void foo() const {}
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};
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void helper(const AbstractClass ¶m) {
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param.foo();
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}
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void foo() {
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// CHECK-LABEL: @_ZN7PR231653fooEv
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// CHECK: call {{.*}} @_ZN7PR2316510ChildClassC1Ev
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// CHECK: call void @_ZN7PR231656helperERKNS_13AbstractClassE
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helper(ChildClass());
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}
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struct S { struct T { int a; } t; mutable int b; };
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void f() {
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// CHECK-LABEL: _ZN7PR231651fEv
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// CHECK: alloca
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// CHECK: alloca
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// CHECK: store
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const S::T &r = S().t;
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}
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}
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