| ; RUN: not --crash llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -exception-model=wasm |
| ; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -exception-model=wasm -mattr=+exception-handling -verify-machineinstrs | FileCheck -allow-deprecated-dag-overlap %s |
| ; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-keep-registers -exception-model=wasm -mattr=+exception-handling |
| |
| target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" |
| target triple = "wasm32-unknown-unknown" |
| |
| %struct.Temp = type { i8 } |
| |
| @_ZTIi = external constant i8* |
| |
| ; CHECK-LABEL: test_throw: |
| ; CHECK: throw __cpp_exception, $0 |
| ; CHECK-NOT: unreachable |
| define void @test_throw(i8* %p) { |
| call void @llvm.wasm.throw(i32 0, i8* %p) |
| ret void |
| } |
| |
| ; Simple test with a try-catch |
| ; |
| ; void foo(); |
| ; void test_catch() { |
| ; try { |
| ; foo(); |
| ; } catch (int) { |
| ; } |
| ; } |
| |
| ; CHECK-LABEL: test_catch: |
| ; CHECK: global.get ${{.+}}=, __stack_pointer |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch $[[EXNREF:[0-9]+]]= |
| ; CHECK: global.set __stack_pointer |
| ; CHECK: block i32 |
| ; CHECK: br_on_exn 0, __cpp_exception, $[[EXNREF]] |
| ; CHECK: rethrow $[[EXNREF]] |
| ; CHECK: end_block |
| ; CHECK: extract_exception $[[EXN:[0-9]+]]= |
| ; CHECK-DAG: i32.store __wasm_lpad_context |
| ; CHECK-DAG: i32.store __wasm_lpad_context+4 |
| ; CHECK: call $drop=, _Unwind_CallPersonality, $[[EXN]] |
| ; CHECK: block |
| ; CHECK: br_if 0 |
| ; CHECK: call $drop=, __cxa_begin_catch |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: br 1 |
| ; CHECK: end_block |
| ; CHECK: rethrow $[[EXNREF]] |
| ; CHECK: end_try |
| define void @test_catch() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @foo() |
| to label %try.cont unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %entry |
| %0 = catchswitch within none [label %catch.start] unwind to caller |
| |
| catch.start: ; preds = %catch.dispatch |
| %1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*)] |
| %2 = call i8* @llvm.wasm.get.exception(token %1) |
| %3 = call i32 @llvm.wasm.get.ehselector(token %1) |
| %4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) |
| %matches = icmp eq i32 %3, %4 |
| br i1 %matches, label %catch, label %rethrow |
| |
| catch: ; preds = %catch.start |
| %5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| rethrow: ; preds = %catch.start |
| call void @llvm.wasm.rethrow.in.catch() [ "funclet"(token %1) ] |
| unreachable |
| |
| try.cont: ; preds = %catch, %entry |
| ret void |
| } |
| |
| ; Destructor (cleanup) test |
| ; |
| ; void foo(); |
| ; struct Temp { |
| ; ~Temp() {} |
| ; }; |
| ; void test_cleanup() { |
| ; Temp t; |
| ; foo(); |
| ; } |
| |
| ; CHECK-LABEL: test_cleanup: |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch $[[EXNREF:[0-9]+]]= |
| ; CHECK: global.set __stack_pointer |
| ; CHECK: call $drop=, _ZN4TempD2Ev |
| ; CHECK: rethrow $[[EXNREF]] |
| ; CHECK: end_try |
| define void @test_cleanup() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| %t = alloca %struct.Temp, align 1 |
| invoke void @foo() |
| to label %invoke.cont unwind label %ehcleanup |
| |
| invoke.cont: ; preds = %entry |
| %call = call %struct.Temp* @_ZN4TempD2Ev(%struct.Temp* %t) |
| ret void |
| |
| ehcleanup: ; preds = %entry |
| %0 = cleanuppad within none [] |
| %call1 = call %struct.Temp* @_ZN4TempD2Ev(%struct.Temp* %t) [ "funclet"(token %0) ] |
| cleanupret from %0 unwind to caller |
| } |
| |
| ; Calling a function that may throw within a 'catch (...)' generates a |
| ; temrinatepad, because __cxa_end_catch() also can throw within 'catch (...)'. |
| ; |
| ; void foo(); |
| ; void test_terminatepad() { |
| ; try { |
| ; foo(); |
| ; } catch (...) { |
| ; foo(); |
| ; } |
| ; } |
| |
| ; CHECK-LABEL: test_terminatepad |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch |
| ; CHECK: call $drop=, __cxa_begin_catch |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch |
| ; CHECK: try |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: catch |
| ; CHECK: block i32 |
| ; CHECK: br_on_exn 0, __cpp_exception |
| ; CHECK: i32.const ${{.*}}=, 0 |
| ; CHECK: call __clang_call_terminate |
| ; CHECK: unreachable |
| ; CHECK: end_block |
| ; CHECK: call __clang_call_terminate |
| ; CHECK: unreachable |
| ; CHECK: end_try |
| ; CHECK: rethrow |
| ; CHECK: end_try |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: end_try |
| define void @test_terminatepad() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @foo() |
| to label %try.cont unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %entry |
| %0 = catchswitch within none [label %catch.start] unwind to caller |
| |
| catch.start: ; preds = %catch.dispatch |
| %1 = catchpad within %0 [i8* null] |
| %2 = call i8* @llvm.wasm.get.exception(token %1) |
| %3 = call i32 @llvm.wasm.get.ehselector(token %1) |
| %4 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| invoke void @foo() [ "funclet"(token %1) ] |
| to label %invoke.cont1 unwind label %ehcleanup |
| |
| invoke.cont1: ; preds = %catch.start |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| try.cont: ; preds = %invoke.cont1, %entry |
| ret void |
| |
| ehcleanup: ; preds = %catch.start |
| %5 = cleanuppad within %1 [] |
| invoke void @__cxa_end_catch() [ "funclet"(token %5) ] |
| to label %invoke.cont2 unwind label %terminate |
| |
| invoke.cont2: ; preds = %ehcleanup |
| cleanupret from %5 unwind to caller |
| |
| terminate: ; preds = %ehcleanup |
| %6 = cleanuppad within %5 [] |
| %7 = call i8* @llvm.wasm.get.exception(token %6) |
| call void @__clang_call_terminate(i8* %7) [ "funclet"(token %6) ] |
| unreachable |
| } |
| |
| ; Tests prologues and epilogues are not generated within EH scopes. |
| ; They should not be treated as funclets; BBs starting with a catch instruction |
| ; should not have a prologue, and BBs ending with a catchret/cleanupret should |
| ; not have an epilogue. This is separate from __stack_pointer restoring |
| ; instructions after a catch instruction. |
| ; |
| ; void bar(int) noexcept; |
| ; void test_no_prolog_epilog_in_ehpad() { |
| ; int stack_var = 0; |
| ; bar(stack_var); |
| ; try { |
| ; foo(); |
| ; } catch (int) { |
| ; foo(); |
| ; } |
| ; } |
| |
| ; CHECK-LABEL: test_no_prolog_epilog_in_ehpad |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch |
| ; CHECK-NOT: global.get $push{{.+}}=, __stack_pointer |
| ; CHECK: global.set __stack_pointer |
| ; CHECK: block |
| ; CHECK: block |
| ; CHECK: br_if 0 |
| ; CHECK: call $drop=, __cxa_begin_catch |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch |
| ; CHECK-NOT: global.get $push{{.+}}=, __stack_pointer |
| ; CHECK: global.set __stack_pointer |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: rethrow |
| ; CHECK-NOT: global.set __stack_pointer, $pop{{.+}} |
| ; CHECK: end_try |
| ; CHECK: end_block |
| ; CHECK: rethrow |
| ; CHECK: end_block |
| ; CHECK-NOT: global.set __stack_pointer, $pop{{.+}} |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: end_try |
| define void @test_no_prolog_epilog_in_ehpad() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| %stack_var = alloca i32, align 4 |
| call void @bar(i32* %stack_var) |
| invoke void @foo() |
| to label %try.cont unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %entry |
| %0 = catchswitch within none [label %catch.start] unwind to caller |
| |
| catch.start: ; preds = %catch.dispatch |
| %1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*)] |
| %2 = call i8* @llvm.wasm.get.exception(token %1) |
| %3 = call i32 @llvm.wasm.get.ehselector(token %1) |
| %4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) |
| %matches = icmp eq i32 %3, %4 |
| br i1 %matches, label %catch, label %rethrow |
| |
| catch: ; preds = %catch.start |
| %5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| %6 = bitcast i8* %5 to float* |
| %7 = load float, float* %6, align 4 |
| invoke void @foo() [ "funclet"(token %1) ] |
| to label %invoke.cont1 unwind label %ehcleanup |
| |
| invoke.cont1: ; preds = %catch |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| rethrow: ; preds = %catch.start |
| call void @llvm.wasm.rethrow.in.catch() [ "funclet"(token %1) ] |
| unreachable |
| |
| try.cont: ; preds = %invoke.cont1, %entry |
| ret void |
| |
| ehcleanup: ; preds = %catch |
| %8 = cleanuppad within %1 [] |
| call void @__cxa_end_catch() [ "funclet"(token %8) ] |
| cleanupret from %8 unwind to caller |
| } |
| |
| ; When a function does not have stack-allocated objects, it does not need to |
| ; store SP back to __stack_pointer global at the epilog. |
| ; |
| ; void foo(); |
| ; void test_no_sp_writeback() { |
| ; try { |
| ; foo(); |
| ; } catch (...) { |
| ; } |
| ; } |
| |
| ; CHECK-LABEL: test_no_sp_writeback |
| ; CHECK: try |
| ; CHECK: call foo |
| ; CHECK: catch |
| ; CHECK: call $drop=, __cxa_begin_catch |
| ; CHECK: call __cxa_end_catch |
| ; CHECK: end_try |
| ; CHECK-NOT: global.set __stack_pointer |
| ; CHECK: return |
| define void @test_no_sp_writeback() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @foo() |
| to label %try.cont unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %entry |
| %0 = catchswitch within none [label %catch.start] unwind to caller |
| |
| catch.start: ; preds = %catch.dispatch |
| %1 = catchpad within %0 [i8* null] |
| %2 = call i8* @llvm.wasm.get.exception(token %1) |
| %3 = call i32 @llvm.wasm.get.ehselector(token %1) |
| %4 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| try.cont: ; preds = %catch.start, %entry |
| ret void |
| } |
| |
| ; When the result of @llvm.wasm.get.exception is not used. This is created to |
| ; fix a bug in LateEHPrepare and this should not crash. |
| define void @test_get_exception_wo_use() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @foo() |
| to label %try.cont unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %entry |
| %0 = catchswitch within none [label %catch.start] unwind to caller |
| |
| catch.start: ; preds = %catch.dispatch |
| %1 = catchpad within %0 [i8* null] |
| %2 = call i8* @llvm.wasm.get.exception(token %1) |
| %3 = call i32 @llvm.wasm.get.ehselector(token %1) |
| catchret from %1 to label %try.cont |
| |
| try.cont: ; preds = %catch.start, %entry |
| ret void |
| } |
| |
| ; Tests a case when a cleanup region (cleanuppad ~ clanupret) contains another |
| ; catchpad |
| define void @test_complex_cleanup_region() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @foo() |
| to label %invoke.cont unwind label %ehcleanup |
| |
| invoke.cont: ; preds = %entry |
| ret void |
| |
| ehcleanup: ; preds = %entry |
| %0 = cleanuppad within none [] |
| invoke void @foo() [ "funclet"(token %0) ] |
| to label %ehcleanupret unwind label %catch.dispatch |
| |
| catch.dispatch: ; preds = %ehcleanup |
| %1 = catchswitch within %0 [label %catch.start] unwind label %ehcleanup.1 |
| |
| catch.start: ; preds = %catch.dispatch |
| %2 = catchpad within %1 [i8* null] |
| %3 = call i8* @llvm.wasm.get.exception(token %2) |
| %4 = call i32 @llvm.wasm.get.ehselector(token %2) |
| catchret from %2 to label %ehcleanupret |
| |
| ehcleanup.1: ; preds = %catch.dispatch |
| %5 = cleanuppad within %0 [] |
| unreachable |
| |
| ehcleanupret: ; preds = %catch.start, %ehcleanup |
| cleanupret from %0 unwind to caller |
| } |
| |
| declare void @foo() |
| declare void @bar(i32*) |
| declare i32 @__gxx_wasm_personality_v0(...) |
| declare void @llvm.wasm.throw(i32, i8*) |
| declare i8* @llvm.wasm.get.exception(token) |
| declare i32 @llvm.wasm.get.ehselector(token) |
| declare void @llvm.wasm.rethrow.in.catch() |
| declare i32 @llvm.eh.typeid.for(i8*) |
| declare i8* @__cxa_begin_catch(i8*) |
| declare void @__cxa_end_catch() |
| declare void @__clang_call_terminate(i8*) |
| declare %struct.Temp* @_ZN4TempD2Ev(%struct.Temp* returned) |
| |
| ; CHECK: __cpp_exception: |
| ; CHECK: .eventtype __cpp_exception i32 |
