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420 lines
16 KiB
420 lines
16 KiB
// REQUIRES: webassembly-registered-target
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -emit-llvm -o - -std=c++11 | FileCheck %s
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// RUN: %clang_cc1 %s -triple wasm64-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -emit-llvm -o - -std=c++11 | FileCheck %s
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void may_throw();
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void dont_throw() noexcept;
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struct Cleanup {
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~Cleanup() { dont_throw(); }
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};
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// Multiple catch clauses w/o catch-all
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void test0() {
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try {
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may_throw();
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} catch (int) {
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dont_throw();
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} catch (double) {
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dont_throw();
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}
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}
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// CHECK-LABEL: define void @_Z5test0v() {{.*}} personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*)
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// CHECK: %[[INT_ALLOCA:.*]] = alloca i32
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK-NEXT: to label %[[NORMAL_BB:.*]] unwind label %[[CATCHDISPATCH_BB:.*]]
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// CHECK: [[CATCHDISPATCH_BB]]:
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// CHECK-NEXT: %[[CATCHSWITCH:.*]] = catchswitch within none [label %[[CATCHSTART_BB:.*]]] unwind to caller
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK-NEXT: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTId to i8*)]
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// CHECK-NEXT: %[[EXN:.*]] = call i8* @llvm.wasm.get.exception(token %[[CATCHPAD]])
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// CHECK-NEXT: store i8* %[[EXN]], i8** %exn.slot
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// CHECK-NEXT: %[[SELECTOR:.*]] = call i32 @llvm.wasm.get.ehselector(token %[[CATCHPAD]])
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// CHECK-NEXT: %[[TYPEID:.*]] = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #2
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// CHECK-NEXT: %[[MATCHES:.*]] = icmp eq i32 %[[SELECTOR]], %[[TYPEID]]
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// CHECK-NEXT: br i1 %[[MATCHES]], label %[[CATCH_INT_BB:.*]], label %[[CATCH_FALLTHROUGH_BB:.*]]
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// CHECK: [[CATCH_INT_BB]]:
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// CHECK-NEXT: %[[EXN:.*]] = load i8*, i8** %exn.slot
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// CHECK-NEXT: %[[ADDR:.*]] = call i8* @__cxa_begin_catch(i8* %[[EXN]]) {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: %[[ADDR_CAST:.*]] = bitcast i8* %[[ADDR]] to i32*
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// CHECK-NEXT: %[[INT_VAL:.*]] = load i32, i32* %[[ADDR_CAST]]
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// CHECK-NEXT: store i32 %[[INT_VAL]], i32* %[[INT_ALLOCA]]
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// CHECK-NEXT: call void @_Z10dont_throwv() {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: call void @__cxa_end_catch() {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: catchret from %[[CATCHPAD]] to label %[[CATCHRET_DEST_BB0:.*]]
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// CHECK: [[CATCHRET_DEST_BB0]]:
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// CHECK-NEXT: br label %[[TRY_CONT_BB:.*]]
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// CHECK: [[CATCH_FALLTHROUGH_BB]]
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// CHECK-NEXT: %[[TYPEID:.*]] = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*)) #2
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// CHECK-NEXT: %[[MATCHES:.*]] = icmp eq i32 %[[SELECTOR]], %[[TYPEID]]
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// CHECK-NEXT: br i1 %[[MATCHES]], label %[[CATCH_FLOAT_BB:.*]], label %[[RETHROW_BB:.*]]
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// CHECK: [[CATCH_FLOAT_BB]]:
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// CHECK: catchret from %[[CATCHPAD]] to label %[[CATCHRET_DEST_BB1:.*]]
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// CHECK: [[CATCHRET_DEST_BB1]]:
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// CHECK-NEXT: br label %[[TRY_CONT_BB]]
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// CHECK: [[RETHROW_BB]]:
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// CHECK-NEXT: call void @llvm.wasm.rethrow.in.catch() {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: unreachable
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// Single catch-all
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void test1() {
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try {
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may_throw();
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} catch (...) {
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dont_throw();
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}
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}
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// CATCH-LABEL: @_Z5test1v()
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// CHECK: %[[CATCHSWITCH:.*]] = catchswitch within none [label %[[CATCHSTART_BB:.*]]] unwind to caller
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK-NEXT: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* null]
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// CHECK: br label %[[CATCH_ALL_BB:.*]]
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// CHECK: [[CATCH_ALL_BB]]:
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// CHECK: catchret from %[[CATCHPAD]] to label
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// Multiple catch clauses w/ catch-all
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void test2() {
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try {
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may_throw();
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} catch (int) {
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dont_throw();
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} catch (...) {
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dont_throw();
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}
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}
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// CHECK-LABEL: @_Z5test2v()
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// CHECK: %[[CATCHSWITCH:.*]] = catchswitch within none [label %[[CATCHSTART_BB:.*]]] unwind to caller
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK-NEXT: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* bitcast (i8** @_ZTIi to i8*), i8* null]
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// CHECK: br i1 %{{.*}}, label %[[CATCH_INT_BB:.*]], label %[[CATCH_ALL_BB:.*]]
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// CHECK: [[CATCH_INT_BB]]:
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// CHECK: catchret from %[[CATCHPAD]] to label
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// CHECK: [[CATCH_ALL_BB]]:
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// CHECK: catchret from %[[CATCHPAD]] to label
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// Cleanup
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void test3() {
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Cleanup c;
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may_throw();
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}
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// CHECK-LABEL: @_Z5test3v()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK-NEXT: to label {{.*}} unwind label %[[EHCLEANUP_BB:.*]]
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// CHECK: [[EHCLEANUP_BB]]:
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// CHECK-NEXT: %[[CLEANUPPAD:.*]] = cleanuppad within none []
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// CHECK-NEXT: call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* {{[^,]*}} %{{.*}}) {{.*}} [ "funclet"(token %[[CLEANUPPAD]]) ]
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD]] unwind to caller
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// Possibly throwing function call within a catch
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void test4() {
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try {
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may_throw();
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} catch (int) {
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may_throw();
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}
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}
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// CHECK-LABEL: @_Z5test4v()
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// CHECK: %[[CATCHSWITCH]] = catchswitch within none [label %[[CATCHSTART_BB]]] unwind to caller
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* bitcast (i8** @_ZTIi to i8*)]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: to label %[[INVOKE_CONT_BB:.*]] unwind label %[[EHCLEANUP_BB:.*]]
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// CHECK: [[INVOKE_CONT_BB]]:
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// CHECK-NEXT: call void @__cxa_end_catch() {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: catchret from %[[CATCHPAD]] to label
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// CHECK: [[EHCLEANUP_BB]]:
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// CHECK-NEXT: %[[CLEANUPPAD:.*]] = cleanuppad within %[[CATCHPAD]] []
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// CHECK-NEXT: call void @__cxa_end_catch() {{.*}} [ "funclet"(token %[[CLEANUPPAD]]) ]
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD]] unwind to caller
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// Possibly throwing function call within a catch-all
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void test5() {
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try {
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may_throw();
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} catch (...) {
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may_throw();
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}
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}
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// CHECK-LABEL: @_Z5test5v()
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// CHECK: %[[CATCHSWITCH:.*]] = catchswitch within none [label %[[CATCHSTART_BB]]] unwind to caller
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* null]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: to label %[[INVOKE_CONT_BB0:.*]] unwind label %[[EHCLEANUP_BB:.*]]
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// CHECK: [[INVOKE_CONT_BB0]]:
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// CHECK-NEXT: call void @__cxa_end_catch() [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: catchret from %[[CATCHPAD]] to label
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// CHECK: [[EHCLEANUP_BB]]:
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// CHECK-NEXT: %[[CLEANUPPAD0:.*]] = cleanuppad within %[[CATCHPAD]] []
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// CHECK-NEXT: invoke void @__cxa_end_catch() [ "funclet"(token %[[CLEANUPPAD0]]) ]
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// CHECK-NEXT: to label %[[INVOKE_CONT_BB1:.*]] unwind label %[[TERMINATE_BB:.*]]
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// CHECK: [[INVOKE_CONT_BB1]]:
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD0]] unwind to caller
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// CHECK: [[TERMINATE_BB]]:
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// CHECK-NEXT: %[[CLEANUPPAD1:.*]] = cleanuppad within %[[CLEANUPPAD0]] []
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// CHECK-NEXT: %[[EXN:.*]] = call i8* @llvm.wasm.get.exception(token %[[CLEANUPPAD1]])
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// CHECK-NEXT: call void @__clang_call_terminate(i8* %[[EXN]]) {{.*}} [ "funclet"(token %[[CLEANUPPAD1]]) ]
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// CHECK-NEXT: unreachable
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// CHECK-LABEL: define {{.*}} void @__clang_call_terminate(i8* %0)
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// CHECK-NEXT: call i8* @__cxa_begin_catch(i8* %{{.*}})
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// CHECK-NEXT: call void @_ZSt9terminatev()
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// CHECK-NEXT: unreachable
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// Try-catch with cleanups
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void test6() {
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Cleanup c1;
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try {
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Cleanup c2;
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may_throw();
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} catch (int) {
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Cleanup c3;
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may_throw();
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}
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}
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// CHECK-LABEL: @_Z5test6v()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK-NEXT: to label %{{.*}} unwind label %[[EHCLEANUP_BB0:.*]]
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// CHECK: [[EHCLEANUP_BB0]]:
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// CHECK-NEXT: %[[CLEANUPPAD0:.*]] = cleanuppad within none []
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// CHECK-NEXT: call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* {{.*}}) {{.*}} [ "funclet"(token %[[CLEANUPPAD0]]) ]
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD0]] unwind label %[[CATCH_DISPATCH_BB:.*]]
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// CHECK: [[CATCH_DISPATCH_BB]]:
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// CHECK-NEXT: %[[CATCHSWITCH:.*]] = catchswitch within none [label %[[CATCHSTART_BB:.*]]] unwind label %[[EHCLEANUP_BB1:.*]]
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// CHECK: [[CATCHSTART_BB]]:
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// CHECK-NEXT: %[[CATCHPAD:.*]] = catchpad within %[[CATCHSWITCH]] [i8* bitcast (i8** @_ZTIi to i8*)]
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// CHECK: br i1 %{{.*}}, label %[[CATCH_INT_BB:.*]], label %[[RETHROW_BB:.*]]
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// CHECK: [[CATCH_INT_BB]]:
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: to label %[[INVOKE_CONT_BB:.*]] unwind label %[[EHCLEANUP_BB2:.*]]
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// CHECK: [[INVOKE_CONT_BB]]:
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// CHECK: catchret from %[[CATCHPAD]] to label %{{.*}}
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// CHECK: [[RETHROW_BB]]:
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// CHECK-NEXT: invoke void @llvm.wasm.rethrow.in.catch() {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
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// CHECK-NEXT: to label %[[UNREACHABLE_BB:.*]] unwind label %[[EHCLEANUP_BB1:.*]]
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// CHECK: [[EHCLEANUP_BB2]]:
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// CHECK-NEXT: %[[CLEANUPPAD2:.*]] = cleanuppad within %[[CATCHPAD]] []
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// CHECK-NEXT: call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* {{[^,]*}} %{{.*}}) {{.*}} [ "funclet"(token %[[CLEANUPPAD2]]) ]
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD2]] unwind label %[[EHCLEANUP_BB3:.*]]
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// CHECK: [[EHCLEANUP_BB3]]:
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// CHECK-NEXT: %[[CLEANUPPAD3:.*]] = cleanuppad within %[[CATCHPAD]] []
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// CHECK: cleanupret from %[[CLEANUPPAD3]] unwind label %[[EHCLEANUP_BB1:.*]]
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// CHECK: [[EHCLEANUP_BB1]]:
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// CHECK-NEXT: %[[CLEANUPPAD1:.*]] = cleanuppad within none []
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// CHECK-NEXT: call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* {{[^,]*}} %{{.*}}) {{.*}} [ "funclet"(token %[[CLEANUPPAD1]]) ]
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// CHECK-NEXT: cleanupret from %[[CLEANUPPAD1]] unwind to caller
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// CHECK: [[UNREACHABLE_BB]]:
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// CHECK-NEXT: unreachable
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// Nested try-catches within a try with cleanups
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void test7() {
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Cleanup c1;
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may_throw();
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try {
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Cleanup c2;
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may_throw();
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try {
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Cleanup c3;
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may_throw();
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} catch (int) {
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may_throw();
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} catch (double) {
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may_throw();
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}
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} catch (int) {
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may_throw();
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} catch (...) {
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may_throw();
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}
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}
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// CHECK-LABEL: @_Z5test7v()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK: %[[CLEANUPPAD0:.*]] = cleanuppad within none []
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// CHECK: cleanupret from %[[CLEANUPPAD0]] unwind label
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// CHECK: %[[CATCHSWITCH0:.*]] = catchswitch within none
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// CHECK: %[[CATCHPAD0:.*]] = catchpad within %[[CATCHSWITCH0]] [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTId to i8*)]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD0]]) ]
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// CHECK: catchret from %[[CATCHPAD0]] to label
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD0]]) ]
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// CHECK: catchret from %[[CATCHPAD0]] to label
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// CHECK: invoke void @llvm.wasm.rethrow.in.catch() {{.*}} [ "funclet"(token %[[CATCHPAD0]]) ]
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// CHECK: %[[CLEANUPPAD1:.*]] = cleanuppad within %[[CATCHPAD0]] []
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// CHECK: cleanupret from %[[CLEANUPPAD1]] unwind label
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// CHECK: %[[CLEANUPPAD2:.*]] = cleanuppad within %[[CATCHPAD0]] []
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// CHECK: cleanupret from %[[CLEANUPPAD2]] unwind label
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// CHECK: %[[CLEANUPPAD3:.*]] = cleanuppad within none []
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// CHECK: cleanupret from %[[CLEANUPPAD3]] unwind label
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// CHECK: %[[CATCHSWITCH1:.*]] = catchswitch within none
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// CHECK: %[[CATCHPAD1:.*]] = catchpad within %[[CATCHSWITCH1]] [i8* bitcast (i8** @_ZTIi to i8*), i8* null]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD1]]) ]
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// CHECK: catchret from %[[CATCHPAD1]] to label
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD1]]) ]
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// CHECK: invoke void @__cxa_end_catch() [ "funclet"(token %[[CATCHPAD1]]) ]
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// CHECK: catchret from %[[CATCHPAD1]] to label
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// CHECK: %[[CLEANUPPAD4:.*]] = cleanuppad within %[[CATCHPAD1]] []
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// CHECK: invoke void @__cxa_end_catch() [ "funclet"(token %[[CLEANUPPAD4]]) ]
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// CHECK: cleanupret from %[[CLEANUPPAD4]] unwind label
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// CHECK: %[[CLEANUPPAD5:.*]] = cleanuppad within %[[CATCHPAD1]] []
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// CHECK: cleanupret from %[[CLEANUPPAD5]] unwind label
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// CHECK: %[[CLEANUPPAD6:.*]] = cleanuppad within none []
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// CHECK: cleanupret from %[[CLEANUPPAD6]] unwind to caller
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// CHECK: unreachable
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// CHECK: %[[CLEANUPPAD7:.*]] = cleanuppad within %[[CLEANUPPAD4]] []
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// CHECK: call void @__clang_call_terminate(i8* %{{.*}}) {{.*}} [ "funclet"(token %[[CLEANUPPAD7]]) ]
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// CHECK: unreachable
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// Nested try-catches within a catch
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void test8() {
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try {
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may_throw();
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} catch (int) {
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try {
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may_throw();
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} catch (int) {
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may_throw();
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}
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}
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}
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// CHECK-LABEL: @_Z5test8v()
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// CHECK: invoke void @_Z9may_throwv()
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// CHECK: %[[CATCHSWITCH0:.*]] = catchswitch within none
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// CHECK: %[[CATCHPAD0:.*]] = catchpad within %[[CATCHSWITCH0]] [i8* bitcast (i8** @_ZTIi to i8*)]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD0]]) ]
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// CHECK: %[[CATCHSWITCH1:.*]] = catchswitch within %[[CATCHPAD0]]
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// CHECK: %[[CATCHPAD1:.*]] = catchpad within %[[CATCHSWITCH1]] [i8* bitcast (i8** @_ZTIi to i8*)]
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// CHECK: invoke void @_Z9may_throwv() [ "funclet"(token %[[CATCHPAD1]]) ]
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// CHECK: catchret from %[[CATCHPAD1]] to label
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// CHECK: invoke void @llvm.wasm.rethrow.in.catch() {{.*}} [ "funclet"(token %[[CATCHPAD1]]) ]
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// CHECK: catchret from %[[CATCHPAD0]] to label
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// CHECK: call void @llvm.wasm.rethrow.in.catch() {{.*}} [ "funclet"(token %[[CATCHPAD0]]) ]
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// CHECK: unreachable
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// CHECK: %[[CLEANUPPAD0:.*]] = cleanuppad within %[[CATCHPAD1]] []
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// CHECK: cleanupret from %[[CLEANUPPAD0]] unwind label
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// CHECK: %[[CLEANUPPAD1:.*]] = cleanuppad within %[[CATCHPAD0]] []
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// CHECK: cleanupret from %[[CLEANUPPAD1]] unwind to caller
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// CHECK: unreachable
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -emit-llvm -o - -std=c++11 2>&1 | FileCheck %s --check-prefix=WARNING-DEFAULT
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -Wwasm-exception-spec -emit-llvm -o - -std=c++11 2>&1 | FileCheck %s --check-prefix=WARNING-ON
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -Wno-wasm-exception-spec -emit-llvm -o - -std=c++11 2>&1 | FileCheck %s --check-prefix=WARNING-OFF
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fexceptions -fcxx-exceptions -emit-llvm -o - -std=c++11 2>&1 | FileCheck %s --check-prefix=NOT-WASM-EH
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// Wasm EH ignores dynamic exception specifications with types at the moment.
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// This is controlled by -Wwasm-exception-spec, which is on by default. This
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// warning can be suppressed with -Wno-wasm-exception-spec. Checks if a warning
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// message is correctly printed or not printed depending on the options.
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void test9() throw(int) {
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}
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// WARNING-DEFAULT: warning: dynamic exception specifications with types are currently ignored in wasm
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// WARNING-ON: warning: dynamic exception specifications with types are currently ignored in wasm
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// WARNING-OFF-NOT: warning: dynamic exception specifications with types are currently ignored in wasm
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// NOT-WASM-EH-NOT: warning: dynamic exception specifications with types are currently ignored in wasm
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// Wasm curremtly treats 'throw()' in the same way as 'noexept'. Check if the
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// same warning message is printed as if when a 'noexcept' function throws.
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void test10() throw() {
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throw 3;
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}
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// WARNING-DEFAULT: warning: 'test10' has a non-throwing exception specification but can still throw
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// WARNING-DEFAULT: function declared non-throwing here
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// Here we only check if the command enables wasm exception handling in the
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// backend so that exception handling instructions can be generated in .s file.
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// RUN: %clang_cc1 %s -triple wasm32-unknown-unknown -fms-extensions -fexceptions -fcxx-exceptions -fwasm-exceptions -target-feature +exception-handling -S -o - -std=c++11 | FileCheck %s --check-prefix=ASSEMBLY
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// ASSEMBLY: try
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// ASSEMBLY: catch
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// ASSEMBLY: rethrow
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// ASSEMBLY: end_try
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