derek.holloway
7502bf64a4
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42 lines
1.7 KiB
C++
42 lines
1.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -mconstructor-aliases -fclangir -emit-cir -mmlir --mlir-print-ir-before=cir-lowering-prepare %s -o %t.cir 2> %t-before.cir
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// RUN: FileCheck --check-prefix=CIR --input-file=%t-before.cir %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -mconstructor-aliases -fclangir -emit-llvm %s -o %t-cir.ll
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// RUN: FileCheck --check-prefix=LLVM --input-file=%t-cir.ll %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -mconstructor-aliases -emit-llvm %s -o %t.ll
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// RUN: FileCheck --check-prefix=OGCG --input-file=%t.ll %s
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struct S {
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struct Rep {
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union {
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char shortbuf[16];
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struct { long sz; char *p; } longrep;
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};
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constexpr Rep() : shortbuf{} {}
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} r;
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constexpr S() : r() {}
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~S() {}
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};
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S g;
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// The dtor region must bitcast `@g`'s narrowed pointer back to `!rec_S`
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// before the dtor call.
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// CIR: !rec_S = !cir.struct<"S"
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// CIR: cir.global external @g = #cir.zero : ![[NARROW_TY:rec_anon_struct[0-9]*]] dtor {
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// CIR: %[[ADDR:.+]] = cir.get_global @g : !cir.ptr<![[NARROW_TY]]>
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// CIR: %[[CAST:.+]] = cir.cast bitcast %[[ADDR]] : !cir.ptr<![[NARROW_TY]]> -> !cir.ptr<!rec_S>
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// CIR: cir.call @_ZN1SD2Ev(%[[CAST]]) : (!cir.ptr<!rec_S>) -> ()
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// CIR: }
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// LLVM: @g = global { { { [16 x i8] } } } zeroinitializer
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// LLVM: define internal void @__cxx_global_array_dtor(ptr noundef %[[A0:.*]])
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// LLVM: call void @_ZN1SD2Ev(ptr %[[A0]])
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// LLVM: define internal void @__cxx_global_var_init()
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// LLVM: call void @__cxa_atexit(ptr @__cxx_global_array_dtor, ptr @g, ptr @__dso_handle)
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// OGCG: @g = global { { { [16 x i8] } } } zeroinitializer
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// OGCG: define internal void @__cxx_global_var_init()
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// OGCG: call i32 @__cxa_atexit(ptr @_ZN1SD2Ev, ptr @g, ptr @__dso_handle)
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