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