| ; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-keep-registers -exception-model=wasm -mattr=+exception-handling | FileCheck -allow-deprecated-dag-overlap %s |
| target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" |
| target triple = "wasm32-unknown-unknown" |
| |
| @_ZTIi = external constant i8* |
| @_ZTIf = external constant i8* |
| @_ZTId = external constant i8* |
| |
| ; Single catch (...) does not need an exception table. |
| ; |
| ; try { |
| ; may_throw(); |
| ; } catch (...) { |
| ; } |
| ; CHECK-LABEL: test0: |
| ; CHECK-NOT: GCC_except_table |
| define void @test0() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @may_throw() |
| 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 = %entry, %catch.start |
| ret void |
| } |
| |
| ; Exception table generation + shared action test. |
| ; |
| ; try { |
| ; may_throw(); |
| ; } catch (int) { |
| ; } catch (float) { |
| ; } catch (double) { |
| ; } catch (...) { |
| ; } |
| ; |
| ; try { |
| ; may_throw(); |
| ; } catch (double) { |
| ; } catch (...) { |
| ; } |
| ; |
| ; try { |
| ; may_throw(); |
| ; } catch (int) { |
| ; } catch (float) { |
| ; } |
| ; |
| ; There are three landing pads. The second landing pad should share action table |
| ; entries with the first landing pad because they end with the same sequence |
| ; (double -> ...). But the third landing table cannot share action table entries |
| ; with others, so it should create its own entries. |
| ; CHECK-LABEL: test1: |
| ; CHECK: .section .rodata.gcc_except_table,"",@ |
| ; CHECK-NEXT: .p2align 2 |
| ; CHECK-NEXT: GCC_except_table[[START:[0-9]+]]: |
| ; CHECK-NEXT: .Lexception0: |
| ; CHECK-NEXT: .int8 255 # @LPStart Encoding = omit |
| ; CHECK-NEXT: .int8 0 # @TType Encoding = absptr |
| ; CHECK-NEXT: .uleb128 .Lttbase0-.Lttbaseref0 |
| ; CHECK-NEXT: .Lttbaseref0: |
| ; CHECK-NEXT: .int8 1 # Call site Encoding = uleb128 |
| ; CHECK-NEXT: .uleb128 .Lcst_end0-.Lcst_begin0 |
| ; CHECK-NEXT: .Lcst_begin0: |
| ; CHECK-NEXT: .int8 0 # >> Call Site 0 << |
| ; CHECK-NEXT: # On exception at call site 0 |
| ; CHECK-NEXT: .int8 7 # Action: 4 |
| ; CHECK-NEXT: .int8 1 # >> Call Site 1 << |
| ; CHECK-NEXT: # On exception at call site 1 |
| ; CHECK-NEXT: .int8 3 # Action: 2 |
| ; CHECK-NEXT: .int8 2 # >> Call Site 2 << |
| ; CHECK-NEXT: # On exception at call site 2 |
| ; CHECK-NEXT: .int8 11 # Action: 6 |
| ; CHECK-NEXT: .Lcst_end0: |
| ; CHECK-NEXT: .int8 1 # >> Action Record 1 << |
| ; CHECK-NEXT: # Catch TypeInfo 1 |
| ; CHECK-NEXT: .int8 0 # No further actions |
| ; CHECK-NEXT: .int8 2 # >> Action Record 2 << |
| ; CHECK-NEXT: # Catch TypeInfo 2 |
| ; CHECK-NEXT: .int8 125 # Continue to action 1 |
| ; CHECK-NEXT: .int8 3 # >> Action Record 3 << |
| ; CHECK-NEXT: # Catch TypeInfo 3 |
| ; CHECK-NEXT: .int8 125 # Continue to action 2 |
| ; CHECK-NEXT: .int8 4 # >> Action Record 4 << |
| ; CHECK-NEXT: # Catch TypeInfo 4 |
| ; CHECK-NEXT: .int8 125 # Continue to action 3 |
| ; CHECK-NEXT: .int8 3 # >> Action Record 5 << |
| ; CHECK-NEXT: # Catch TypeInfo 3 |
| ; CHECK-NEXT: .int8 0 # No further actions |
| ; CHECK-NEXT: .int8 4 # >> Action Record 6 << |
| ; CHECK-NEXT: # Catch TypeInfo 4 |
| ; CHECK-NEXT: .int8 125 # Continue to action 5 |
| ; CHECK-NEXT: .p2align 2 |
| ; CHECK-NEXT: # >> Catch TypeInfos << |
| ; CHECK-NEXT: .int32 _ZTIi # TypeInfo 4 |
| ; CHECK-NEXT: .int32 _ZTIf # TypeInfo 3 |
| ; CHECK-NEXT: .int32 _ZTId # TypeInfo 2 |
| ; CHECK-NEXT: .int32 0 # TypeInfo 1 |
| ; CHECK-NEXT: .Lttbase0: |
| ; CHECK-NEXT: .p2align 2 |
| ; CHECK-NEXT: .LGCC_except_table_end[[END:[0-9]+]]: |
| ; CHECK-NEXT: .size GCC_except_table[[START]], .LGCC_except_table_end[[END]]-GCC_except_table[[START]] |
| define void @test1() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { |
| entry: |
| invoke void @may_throw() |
| 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*), i8* bitcast (i8** @_ZTIf to i8*), i8* bitcast (i8** @_ZTId to i8*), i8* null] |
| %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 %catch10, label %catch.fallthrough |
| |
| catch10: ; preds = %catch.start |
| %5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| %6 = bitcast i8* %5 to i32* |
| %7 = load i32, i32* %6, align 4 |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| try.cont: ; preds = %entry, %catch, %catch4, %catch7, %catch10 |
| invoke void @may_throw() |
| to label %try.cont23 unwind label %catch.dispatch14 |
| |
| catch.dispatch14: ; preds = %try.cont |
| %8 = catchswitch within none [label %catch.start15] unwind to caller |
| |
| catch.start15: ; preds = %catch.dispatch14 |
| %9 = catchpad within %8 [i8* bitcast (i8** @_ZTId to i8*), i8* null] |
| %10 = call i8* @llvm.wasm.get.exception(token %9) |
| %11 = call i32 @llvm.wasm.get.ehselector(token %9) |
| %12 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*)) |
| %matches16 = icmp eq i32 %11, %12 |
| %13 = call i8* @__cxa_begin_catch(i8* %10) [ "funclet"(token %9) ] |
| br i1 %matches16, label %catch20, label %catch17 |
| |
| catch20: ; preds = %catch.start15 |
| %14 = bitcast i8* %13 to double* |
| %15 = load double, double* %14, align 8 |
| call void @__cxa_end_catch() [ "funclet"(token %9) ] |
| catchret from %9 to label %try.cont23 |
| |
| try.cont23: ; preds = %try.cont, %catch17, %catch20 |
| invoke void @may_throw() |
| to label %try.cont36 unwind label %catch.dispatch25 |
| |
| catch.dispatch25: ; preds = %try.cont23 |
| %16 = catchswitch within none [label %catch.start26] unwind to caller |
| |
| catch.start26: ; preds = %catch.dispatch25 |
| %17 = catchpad within %16 [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTIf to i8*)] |
| %18 = call i8* @llvm.wasm.get.exception(token %17) |
| %19 = call i32 @llvm.wasm.get.ehselector(token %17) |
| %20 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) |
| %matches27 = icmp eq i32 %19, %20 |
| br i1 %matches27, label %catch33, label %catch.fallthrough28 |
| |
| catch33: ; preds = %catch.start26 |
| %21 = call i8* @__cxa_begin_catch(i8* %18) [ "funclet"(token %17) ] |
| %22 = bitcast i8* %21 to i32* |
| %23 = load i32, i32* %22, align 4 |
| call void @__cxa_end_catch() [ "funclet"(token %17) ] |
| catchret from %17 to label %try.cont36 |
| |
| catch.fallthrough28: ; preds = %catch.start26 |
| %24 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIf to i8*)) |
| %matches29 = icmp eq i32 %19, %24 |
| br i1 %matches29, label %catch30, label %rethrow |
| |
| catch30: ; preds = %catch.fallthrough28 |
| %25 = call i8* @__cxa_begin_catch(i8* %18) [ "funclet"(token %17) ] |
| %26 = bitcast i8* %25 to float* |
| %27 = load float, float* %26, align 4 |
| call void @__cxa_end_catch() [ "funclet"(token %17) ] |
| catchret from %17 to label %try.cont36 |
| |
| rethrow: ; preds = %catch.fallthrough28 |
| call void @__cxa_rethrow() [ "funclet"(token %17) ] |
| unreachable |
| |
| try.cont36: ; preds = %try.cont23, %catch30, %catch33 |
| ret void |
| |
| catch17: ; preds = %catch.start15 |
| call void @__cxa_end_catch() [ "funclet"(token %9) ] |
| catchret from %9 to label %try.cont23 |
| |
| catch.fallthrough: ; preds = %catch.start |
| %28 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIf to i8*)) |
| %matches1 = icmp eq i32 %3, %28 |
| br i1 %matches1, label %catch7, label %catch.fallthrough2 |
| |
| catch7: ; preds = %catch.fallthrough |
| %29 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| %30 = bitcast i8* %29 to float* |
| %31 = load float, float* %30, align 4 |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| catch.fallthrough2: ; preds = %catch.fallthrough |
| %32 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*)) |
| %matches3 = icmp eq i32 %3, %32 |
| %33 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ] |
| br i1 %matches3, label %catch4, label %catch |
| |
| catch4: ; preds = %catch.fallthrough2 |
| %34 = bitcast i8* %33 to double* |
| %35 = load double, double* %34, align 8 |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| |
| catch: ; preds = %catch.fallthrough2 |
| call void @__cxa_end_catch() [ "funclet"(token %1) ] |
| catchret from %1 to label %try.cont |
| } |
| |
| declare void @may_throw() |
| declare i32 @llvm.eh.typeid.for(i8*) |
| declare i8* @llvm.wasm.get.exception(token) |
| declare i32 @llvm.wasm.get.ehselector(token) |
| declare void @__cxa_rethrow() |
| declare i8* @__cxa_begin_catch(i8*) |
| declare void @__cxa_end_catch() |
| declare i32 @__gxx_wasm_personality_v0(...) |
