97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
// RUN: %clang_cc1 -triple armv7-none-eabi -emit-llvm -o - %s | FileCheck %s
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struct A { int x; A(int); ~A(); };
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A f() { return A(0); }
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// CHECK-LABEL: define void @_Z1fv
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// CHECK: call {{.*}} @_ZN1AC1Ei
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// CHECK-NEXT: ret void
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// Verify that we do not elide copies when constructing a base class.
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namespace no_elide_base {
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struct Base {
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Base(const Base&);
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~Base();
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};
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struct Other {
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operator Base() const;
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};
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struct Derived : public virtual Base {
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Derived(const Other &O);
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};
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// CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* returned %this, %"struct.no_elide_base::Other"* dereferenceable({{[0-9]+}}) %O) unnamed_addr
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Derived::Derived(const Other &O)
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// CHECK: call {{.*}} @_ZNK13no_elide_base5OthercvNS_4BaseEEv
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// CHECK: call {{.*}} @_ZN13no_elide_base4BaseC2ERKS0_
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// CHECK: call {{.*}} @_ZN13no_elide_base4BaseD1Ev
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: Base(O)
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{
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// CHECK: ret
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}
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}
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// PR8683.
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namespace PR8683 {
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struct A {
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A();
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A(const A&);
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A& operator=(const A&);
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};
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struct B {
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A a;
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};
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void f() {
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// Verify that we don't mark the copy constructor in this expression as elidable.
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// CHECK: call {{.*}} @_ZN6PR86831AC1ERKS0_
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A a = (B().a);
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}
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}
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namespace PR12139 {
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struct A {
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A() : value(1) { }
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A(A const &, int value = 2) : value(value) { }
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int value;
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static A makeA() { A a; a.value = 2; return a; }
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};
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// CHECK-LABEL: define i32 @_ZN7PR121394testEv
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int test() {
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// CHECK: call void @_ZN7PR121391A5makeAEv
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// CHECK-NEXT: call %"struct.PR12139::A"* @_ZN7PR121391AC1ERKS0_i
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A a(A::makeA(), 3);
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// CHECK-NEXT: getelementptr inbounds
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// CHECK-NEXT: load
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// CHECK-NEXT: ret i32
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return a.value;
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}
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}
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namespace ElidableCallIsNotCopyCtor {
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struct A { A(const A&); };
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struct B : A {
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B(B&);
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B(A);
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B(int);
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};
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void f() {
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// Here, we construct via B(int) then B(A). The B(A) construction is
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// elidable, but we don't have an AST representation for the case where we
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// must elide not only a constructor call but also some argument
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// conversions, so we don't elide it.
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// CHECK-LABEL: define void @_ZN25ElidableCallIsNotCopyCtor1fEv(
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// CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1BC1Ei(
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// CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1AC1ERKS0_(
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// CHECK: call {{.*}} @_ZN25ElidableCallIsNotCopyCtor1BC1ENS_1AE(
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B b = 0;
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}
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}
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