derek.holloway
7502bf64a4
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108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
// RUN: %clang_cc1 -std=c++1z -emit-llvm -triple x86_64-linux-gnu -o - %s | FileCheck %s
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struct A {
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A(int);
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A(A&&);
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A(const A&);
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~A();
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operator bool();
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int arr[10];
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};
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A f();
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void h();
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// CHECK-LABEL: define {{.*}} @_Z1gv(
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void g() {
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// CHECK: %[[A:.*]] = alloca
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// CHECK-NOT: alloca
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// CHECK-NOT: call
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// CHECK: call {{.*}} @_Z1fv(ptr dead_on_unwind writable sret({{.*}}) align 4 %[[A]])
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A a = A( A{ f() } );
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// CHECK-NOT: call
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// CHECK: call void @_Z1hv(
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h();
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// CHECK-NOT: call
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// CHECK: call void @_ZN1AD1Ev(ptr {{[^,]*}} %[[A]])
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// CHECK-NOT: call
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// CHECK-LABEL: }
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}
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void f(A);
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// CHECK-LABEL: define {{.*}} @_Z1hv(
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void h() {
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// CHECK: %[[A:.*]] = alloca
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// CHECK-NOT: alloca
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// CHECK-NOT: call
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// CHECK: call {{.*}} @_Z1fv(ptr dead_on_unwind writable sret({{.*}}) align 4 %[[A]])
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// CHECK-NOT: call
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// CHECK: call {{.*}} @_Z1f1A(ptr noundef %[[A]])
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f(f());
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// CHECK-NOT: call
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// CHECK: call void @_ZN1AD1Ev(ptr {{[^,]*}} %[[A]])
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// CHECK: call void @_Z1hv(
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h();
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// CHECK-NOT: call
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// CHECK-LABEL: }
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}
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// We still pass classes with trivial copy/move constructors and destructors in
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// registers, even if the copy is formally omitted.
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struct B {
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B(int);
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int n;
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};
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B fB();
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void fB(B);
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// CHECK-LABEL: define {{.*}} @_Z1iv(
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void i() {
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// CHECK: %[[B:.*]] = alloca
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// CHECK-NOT: alloca
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// CHECK-NOT: call
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// CHECK: %[[B_N:.*]] = call i32 @_Z2fBv()
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// CHECK-NOT: call
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// CHECK: store i32 %[[B_N]],
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// CHECK-NOT: call
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// CHECK: %[[B_N:.*]] = load i32
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// CHECK-NOT: call
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// CHECK: call void @_Z2fB1B(i32 %[[B_N]])
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fB(fB());
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// CHECK-LABEL: }
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}
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// CHECK-LABEL: define {{.*}} @_Z1jv(
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void j() {
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// CHECK: alloca ptr
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// CHECK: %[[OUTERTEMP:.*]] = alloca %{{.*}}
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// CHECK: %[[INNERTEMP:.*]] = alloca %{{.*}}
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// CHECK: call void @_ZN1AC1Ei(ptr {{.*}} %[[INNERTEMP]], i32 noundef 1)
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// CHECK: call noundef zeroext i1 @_ZN1AcvbEv(ptr {{.*}} %[[INNERTEMP]])
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// CHECK: br i1
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//
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// CHECK: call void @_ZN1AC1EOS_(ptr {{.*}} %[[OUTERTEMP]], ptr {{.*}} %[[INNERTEMP]])
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// CHECK: br label
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//
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// CHECK: call void @_ZN1AC1Ei(ptr {{.*}} %[[OUTERTEMP]], i32 noundef 2)
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// CHECK: br label
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//
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// CHECK: call void @_ZN1AD1Ev(ptr {{.*}} %[[INNERTEMP]])
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A &&a = A(1) ?: A(2);
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// CHECK: call void @_Z1iv()
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i();
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// CHECK: call void @_ZN1AD1Ev(ptr {{.*}} %[[OUTERTEMP]])
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}
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