36 lines
966 B
C++
36 lines
966 B
C++
// RUN: %clangxx -target x86_64-unknown-unknown -g \
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// RUN: %s -emit-llvm -S -o - | FileCheck %s
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// RUN: %clangxx -target x86_64-unknown-unknown -g \
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// RUN: -fno-elide-constructors %s -emit-llvm -S -o - | \
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// RUN: FileCheck %s -check-prefix=NOELIDE
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struct Foo {
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Foo() = default;
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Foo(Foo &&other) { x = other.x; }
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int x;
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};
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void some_function(int);
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Foo getFoo() {
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Foo foo;
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foo.x = 41;
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some_function(foo.x);
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return foo;
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}
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int main() {
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Foo bar = getFoo();
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return bar.x;
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}
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// Check that NRVO variables are stored as a pointer with deref if they are
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// stored in the return register.
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// CHECK: %[[RESULT:.*]] = alloca i8*, align 8
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// CHECK: call void @llvm.dbg.declare(metadata i8** %[[RESULT]],
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// CHECK-SAME: metadata !DIExpression(DW_OP_deref)
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// NOELIDE: %[[FOO:.*]] = alloca %struct.Foo, align 4
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// NOELIDE: call void @llvm.dbg.declare(metadata %struct.Foo* %[[FOO]],
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// NOELIDE-SAME: metadata !DIExpression()
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