derek.holloway
7502bf64a4
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305 lines
13 KiB
C++
305 lines
13 KiB
C++
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fcxx-exceptions -fexceptions -fclangir -emit-cir %s -o %t.cir
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// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
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// RUN: cir-opt %t.cir -cir-flatten-cfg -o %t-flat.cir
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// RUN: FileCheck --input-file=%t-flat.cir %s -check-prefix=CIR-FLAT
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fcxx-exceptions -fexceptions -fclangir -emit-llvm %s -o %t-cir.ll
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// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fcxx-exceptions -fexceptions -emit-llvm %s -o %t.ll
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// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
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void mayThrow();
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struct S {
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S();
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~S();
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};
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void test_catch_all_with_cleanup() {
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try {
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S s;
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mayThrow();
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} catch (...) {
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}
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}
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// CIR-LABEL: cir.func {{.*}} @_Z27test_catch_all_with_cleanupv()
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// CIR: cir.scope {
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// CIR: %[[S:.*]] = cir.alloca !rec_S, !cir.ptr<!rec_S>, ["s", init]
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// CIR: cir.try {
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// CIR: cir.call @_ZN1SC1Ev(%[[S]])
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// CIR: cir.cleanup.scope {
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// CIR: cir.call @_Z8mayThrowv()
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// CIR: cir.yield
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// CIR: } cleanup all {
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// CIR: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: } catch all (%{{.*}}: !cir.eh_token {{.*}}) {
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// CIR: %{{.*}}, %{{.*}} = cir.begin_catch
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// CIR: cir.cleanup.scope {
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// CIR: cir.yield
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// CIR: } cleanup all {
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// CIR: cir.end_catch
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// CIR: }
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// CIR-FLAT-LABEL: cir.func {{.*}} @_Z27test_catch_all_with_cleanupv()
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//
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// CIR-FLAT: %[[S:.*]] = cir.alloca !rec_S
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//
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// Ctor may throw; unwinds directly to the dispatch (no cleanup needed yet).
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// CIR-FLAT: cir.try_call @_ZN1SC1Ev(%[[S]]) ^[[AFTER_CTOR:bb[0-9]+]], ^[[CTOR_UNWIND:bb[0-9]+]]
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//
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// After the ctor, enter the cleanup scope where mayThrow may throw.
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// CIR-FLAT: ^[[AFTER_CTOR]]:
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// CIR-FLAT: cir.try_call @_Z8mayThrowv() ^[[NORMAL:bb[0-9]+]], ^[[INNER_UNWIND:bb[0-9]+]]
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//
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// Normal path: destroy s and exit the try.
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// CIR-FLAT: ^[[NORMAL]]:
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// CIR-FLAT: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR-FLAT: cir.br ^{{.*}}
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//
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// Inner unwind: NO cleanup flag — catch-all catches everything.
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// CIR-FLAT: ^[[INNER_UNWIND]]:
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// CIR-FLAT: %[[INNER_ET:.*]] = cir.eh.initiate : !cir.eh_token
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// CIR-FLAT: cir.br ^[[EH_CLEANUP:bb[0-9]+]](%[[INNER_ET]] : !cir.eh_token)
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//
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// EH cleanup: destroy s on the exception path, then go to dispatch.
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// CIR-FLAT: ^[[EH_CLEANUP]](%[[EH_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: %[[CT:.*]] = cir.begin_cleanup %[[EH_ET]]
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// CIR-FLAT: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR-FLAT: cir.end_cleanup %[[CT]]
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// CIR-FLAT: cir.br ^[[DISPATCH:bb[0-9]+]](%[[EH_ET]] : !cir.eh_token)
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//
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// Ctor unwind: NO cleanup flag — goes directly to dispatch.
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// CIR-FLAT: ^[[CTOR_UNWIND]]:
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// CIR-FLAT: %[[CTOR_ET:.*]] = cir.eh.initiate : !cir.eh_token
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// CIR-FLAT: cir.br ^[[DISPATCH]](%[[CTOR_ET]] : !cir.eh_token)
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//
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// Dispatch: catch-all handler.
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// CIR-FLAT: ^[[DISPATCH]](%[[DISP_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: cir.eh.dispatch %[[DISP_ET]] : !cir.eh_token [
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// CIR-FLAT: catch_all : ^[[CATCH_ALL:bb[0-9]+]]
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// CIR-FLAT: ]
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//
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// Catch handler.
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// CIR-FLAT: ^[[CATCH_ALL]](%[[CA_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: %{{.*}}, %{{.*}} = cir.begin_catch %[[CA_ET]]
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// CIR-FLAT: cir.end_catch
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// CIR-FLAT: cir.return
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// Both landing pads must use "catch ptr null" (not "cleanup") so that the
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// personality function recognises a catch-all handler during the search phase.
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// LLVM-LABEL: define {{.*}} void @_Z27test_catch_all_with_cleanupv()
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// LLVM-SAME: personality ptr @__gxx_personality_v0
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// LLVM: %[[S:.*]] = alloca %struct.S
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// LLVM: invoke void @_ZN1SC1Ev({{.*}}%[[S]])
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// LLVM: to label %[[AFTER_CTOR:.*]] unwind label %[[CTOR_LP:.*]]
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// LLVM: [[AFTER_CTOR]]:
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// LLVM: invoke void @_Z8mayThrowv()
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// LLVM: to label %[[NORMAL:.*]] unwind label %[[INNER_LP:.*]]
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// LLVM: [[NORMAL]]:
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// LLVM: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// LLVM: [[INNER_LP]]:
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// LLVM: landingpad { ptr, i32 }
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// LLVM: catch ptr null
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// LLVM: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// LLVM: [[CTOR_LP]]:
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// LLVM: landingpad { ptr, i32 }
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// LLVM: catch ptr null
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// LLVM: call ptr @__cxa_begin_catch
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// LLVM: call void @__cxa_end_catch()
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// LLVM: ret void
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// OGCG-LABEL: define {{.*}} void @_Z27test_catch_all_with_cleanupv()
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// OGCG-SAME: personality ptr @__gxx_personality_v0
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// OGCG: %[[S:.*]] = alloca %struct.S
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// OGCG: invoke void @_ZN1SC1Ev({{.*}}%[[S]])
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// OGCG: to label %[[AFTER_CTOR:.*]] unwind label %[[CTOR_LP:.*]]
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// OGCG: [[AFTER_CTOR]]:
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// OGCG: invoke void @_Z8mayThrowv()
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// OGCG: to label %[[NORMAL:.*]] unwind label %[[INNER_LP:.*]]
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// OGCG: [[NORMAL]]:
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// OGCG: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// OGCG: [[CTOR_LP]]:
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// OGCG: landingpad { ptr, i32 }
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// OGCG: catch ptr null
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// OGCG: [[INNER_LP]]:
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// OGCG: landingpad { ptr, i32 }
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// OGCG: catch ptr null
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// OGCG: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// OGCG: call ptr @__cxa_begin_catch
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// OGCG: call void @__cxa_end_catch()
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// OGCG: ret void
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void test_catch_all_and_specific_with_cleanup() {
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try {
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S s;
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mayThrow();
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} catch (int e) {
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} catch (...) {
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}
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}
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// CIR-LABEL: cir.func {{.*}} @_Z40test_catch_all_and_specific_with_cleanupv()
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// CIR: cir.scope {
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// CIR: %[[S:.*]] = cir.alloca !rec_S, !cir.ptr<!rec_S>, ["s", init]
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// CIR: %[[E:.*]] = cir.alloca !s32i, !cir.ptr<!s32i>, ["e"]
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// CIR: cir.try {
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// CIR: cir.call @_ZN1SC1Ev(%[[S]])
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// CIR: cir.cleanup.scope {
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// CIR: cir.call @_Z8mayThrowv()
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// CIR: cir.yield
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// CIR: } cleanup all {
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// CIR: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: } catch [type #cir.global_view<@_ZTIi> : !cir.ptr<!u8i>] (%{{.*}}: !cir.eh_token {{.*}}) {
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// CIR: %{{.*}}, %[[EXN:.*]] = cir.begin_catch %{{.*}} : !cir.eh_token -> (!cir.catch_token, !cir.ptr<!void>)
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// CIR: cir.cleanup.scope {
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// CIR: cir.init_catch_param scalar %[[EXN]] to %[[E]] : !cir.ptr<!void>, !cir.ptr<!s32i>
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// CIR: cir.yield
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// CIR: } cleanup all {
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// CIR: cir.end_catch %{{.*}} : !cir.catch_token
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: } catch all (%{{.*}}: !cir.eh_token {{.*}}) {
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// CIR: %{{.*}}, %{{.*}} = cir.begin_catch %{{.*}} : !cir.eh_token -> (!cir.catch_token, !cir.ptr<!void>)
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// CIR: cir.cleanup.scope {
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// CIR: cir.yield
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// CIR: } cleanup all {
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// CIR: cir.end_catch %{{.*}} : !cir.catch_token
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// CIR: cir.yield
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// CIR: }
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// CIR: cir.yield
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// CIR: }
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// CIR: }
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// CIR-FLAT-LABEL: cir.func {{.*}} @_Z40test_catch_all_and_specific_with_cleanupv()
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//
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// CIR-FLAT: %[[S:.*]] = cir.alloca !rec_S
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//
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// Ctor may throw; unwinds directly to the dispatch (no cleanup needed yet).
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// CIR-FLAT: cir.try_call @_ZN1SC1Ev(%[[S]]) ^[[AFTER_CTOR:bb[0-9]+]], ^[[CTOR_UNWIND:bb[0-9]+]]
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//
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// After the ctor, enter the cleanup scope where mayThrow may throw.
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// CIR-FLAT: ^[[AFTER_CTOR]]:
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// CIR-FLAT: cir.try_call @_Z8mayThrowv() ^[[NORMAL:bb[0-9]+]], ^[[INNER_UNWIND:bb[0-9]+]]
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//
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// Normal path: destroy s and exit the try.
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// CIR-FLAT: ^[[NORMAL]]:
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// CIR-FLAT: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR-FLAT: cir.br ^{{.*}}
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//
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// Inner unwind: run cleanup (dtor of s), then dispatch int vs catch-all.
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// CIR-FLAT: ^[[INNER_UNWIND]]:
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// CIR-FLAT: %[[INNER_ET:.*]] = cir.eh.initiate : !cir.eh_token
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// CIR-FLAT: cir.br ^[[EH_CLEANUP:bb[0-9]+]](%[[INNER_ET]] : !cir.eh_token)
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//
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// EH cleanup: destroy s on the exception path, then go to dispatch.
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// CIR-FLAT: ^[[EH_CLEANUP]](%[[EH_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: %[[CT:.*]] = cir.begin_cleanup %[[EH_ET]]
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// CIR-FLAT: cir.call @_ZN1SD1Ev(%[[S]]) nothrow
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// CIR-FLAT: cir.end_cleanup %[[CT]]
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// CIR-FLAT: cir.br ^[[DISPATCH:bb[0-9]+]](%[[EH_ET]] : !cir.eh_token)
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//
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// Ctor unwind: NO cleanup flag — goes directly to dispatch.
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// CIR-FLAT: ^[[CTOR_UNWIND]]:
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// CIR-FLAT: %[[CTOR_ET:.*]] = cir.eh.initiate : !cir.eh_token
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// CIR-FLAT: cir.br ^[[DISPATCH]](%[[CTOR_ET]] : !cir.eh_token)
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//
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// Dispatch: typed catch (int) first, then catch-all.
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// CIR-FLAT: ^[[DISPATCH]](%[[DISP_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: cir.eh.dispatch %[[DISP_ET]] : !cir.eh_token [
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// CIR-FLAT: catch(#cir.global_view<@_ZTIi> : !cir.ptr<!u8i>) : ^[[CATCH_INT:bb[0-9]+]],
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// CIR-FLAT: catch_all : ^[[CATCH_ALL:bb[0-9]+]]
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// CIR-FLAT: ]
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//
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// Catch (int): bind e, end_catch, merge to return.
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// CIR-FLAT: ^[[CATCH_INT]](%{{.*}}: !cir.eh_token):
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// CIR-FLAT: %{{.*}}, %[[EXN_PTR:.*]] = cir.begin_catch %{{.*}} : !cir.eh_token -> (!cir.catch_token, !cir.ptr<!void>)
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// CIR-FLAT: cir.init_catch_param scalar %[[EXN_PTR]] to %{{.*}} : !cir.ptr<!void>, !cir.ptr<!s32i>
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// CIR-FLAT: cir.end_catch %{{.*}} : !cir.catch_token
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// CIR-FLAT: cir.br ^{{.*}}
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//
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// Catch-all handler.
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// CIR-FLAT: ^[[CATCH_ALL]](%[[CA_ET:.*]]: !cir.eh_token):
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// CIR-FLAT: %{{.*}}, %{{.*}} = cir.begin_catch %[[CA_ET]]
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// CIR-FLAT: cir.br ^{{.*}}
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// CIR-FLAT: cir.end_catch %{{.*}} : !cir.catch_token
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// CIR-FLAT: cir.br ^{{.*}}
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//
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// CIR-FLAT: cir.return
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// Lowering from CIR lists only the typed catch in each landingpad; the
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// catch-all is reached from the shared dispatch block (typeid / icmp), not from
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// a separate "catch ptr null" clause on those pads.
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// LLVM-LABEL: define {{.*}} void @_Z40test_catch_all_and_specific_with_cleanupv()
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// LLVM-SAME: personality ptr @__gxx_personality_v0
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// LLVM: %[[S:.*]] = alloca %struct.S
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// LLVM: invoke void @_ZN1SC1Ev({{.*}}%[[S]])
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// LLVM: to label %[[AFTER_CTOR:.*]] unwind label %[[CTOR_LP:.*]]
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// LLVM: [[AFTER_CTOR]]:
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// LLVM: invoke void @_Z8mayThrowv()
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// LLVM: to label %[[NORMAL:.*]] unwind label %[[INNER_LP:.*]]
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// LLVM: [[NORMAL]]:
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// LLVM: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// LLVM: [[INNER_LP]]:
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// LLVM: landingpad { ptr, i32 }
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// LLVM: catch ptr @_ZTIi
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// LLVM: catch ptr null
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// LLVM: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// LLVM: [[CTOR_LP]]:
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// LLVM: landingpad { ptr, i32 }
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// LLVM: catch ptr @_ZTIi
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// LLVM: catch ptr null
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// LLVM: call i32 @llvm.eh.typeid.for.p0(ptr @_ZTIi)
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// LLVM: icmp eq i32 {{.*}}, {{.*}}
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// LLVM: {{.*}}:
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// LLVM: call ptr @__cxa_begin_catch
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// LLVM: call void @__cxa_end_catch()
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// LLVM: {{.*}}:
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// LLVM: call ptr @__cxa_begin_catch
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// LLVM: call void @__cxa_end_catch()
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// LLVM: ret void
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// OGCG-LABEL: define {{.*}} void @_Z40test_catch_all_and_specific_with_cleanupv()
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// OGCG-SAME: personality ptr @__gxx_personality_v0
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// OGCG: %[[S:.*]] = alloca %struct.S
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// OGCG: invoke void @_ZN1SC1Ev({{.*}}%[[S]])
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// OGCG: to label %[[AFTER_CTOR:.*]] unwind label %[[CTOR_LP:.*]]
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// OGCG: [[AFTER_CTOR]]:
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// OGCG: invoke void @_Z8mayThrowv()
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// OGCG: to label %[[NORMAL:.*]] unwind label %[[INNER_LP:.*]]
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// OGCG: [[NORMAL]]:
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// OGCG: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// OGCG: [[CTOR_LP]]:
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// OGCG: landingpad { ptr, i32 }
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// OGCG: catch ptr @_ZTIi
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// OGCG: catch ptr null
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// OGCG: [[INNER_LP]]:
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// OGCG: landingpad { ptr, i32 }
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// OGCG: catch ptr @_ZTIi
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// OGCG: catch ptr null
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// OGCG: call void @_ZN1SD1Ev({{.*}}%[[S]])
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// OGCG: call ptr @__cxa_begin_catch
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// OGCG: load i32, ptr {{.*}}
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// OGCG: store i32 {{.*}}, ptr %e
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// OGCG: call void @__cxa_end_catch()
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// OGCG: br label %try.cont
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// OGCG: try.cont:
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// OGCG: ret void
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// OGCG: catch:
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// OGCG: load ptr, ptr {{.*}}
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// OGCG: call ptr @__cxa_begin_catch
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// OGCG: call void @__cxa_end_catch()
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// OGCG: br label %try.cont
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