derek.holloway
7502bf64a4
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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu \
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// RUN: -fclangir -emit-cir %s -o %t.cir
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// RUN: FileCheck --check-prefix=CIR --input-file=%t.cir %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu \
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// RUN: -fclangir -emit-llvm %s -o %t.ll
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// RUN: FileCheck --check-prefix=LLVM --input-file=%t.ll %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu \
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// RUN: -emit-llvm %s -o %t.og.ll
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// RUN: FileCheck --check-prefix=OGCG --input-file=%t.og.ll %s
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// Test that trivial copy constructors are inlined as aggregate copies
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// (memcpy-equivalent special members) rather than emitted as function calls.
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struct S {
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int a;
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int b;
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};
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struct W {
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S s;
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W(const S &src) : s(src) {}
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};
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void test(const S &src) {
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W w(src);
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}
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// The copy of S in W's constructor should be inlined as cir.copy,
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// not a call to S's copy constructor.
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// CIR-LABEL: cir.func{{.*}} @_ZN1WC2ERK1S
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// CIR-NOT: cir.call @_ZN1SC
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// CIR: cir.copy %{{.+}} to %{{.+}} : !cir.ptr<!rec_S>
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// Both CIR-lowered LLVM and OG produce memcpy for the inlined copy.
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// LLVM-LABEL: define{{.*}} void @_ZN1WC2ERK1S
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// LLVM: call void @llvm.memcpy.p0.p0.i64({{.*}}i64 8
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// OGCG-LABEL: define{{.*}} void @_ZN1WC2ERK1S
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// OGCG: call void @llvm.memcpy.p0.p0.i64({{.*}}i64 8
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