llvm/test/CodeGen/WebAssembly/lower-em-exceptions.ll

; RUN: opt < %s -wasm-lower-em-exceptions -S | FileCheck %s

@_ZTIi = external constant i8*
@_ZTIc = external constant i8*
; CHECK: @[[__THREW__:__THREW__.*]] = global i1 false
; CHECK: @[[THREWVALUE:threwValue.*]] = global i32 0
; CHECK: @[[TEMPRET0:tempRet0.*]] = global i32 0

; Test invoke instruction with clauses (try-catch block)
define void @clause() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK-LABEL: @clause(
entry:
  invoke void @foo(i32 3)
          to label %invoke.cont unwind label %lpad
; CHECK: entry:
; CHECK-NEXT: store i1 false, i1* @[[__THREW__]]
; CHECK-NEXT: call void @__invoke_void_i32(void (i32)* @foo, i32 3)
; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i1, i1* @[[__THREW__]]
; CHECK-NEXT: store i1 false, i1* @[[__THREW__]]
; CHECK-NEXT: br i1 %[[__THREW__VAL]], label %lpad, label %invoke.cont

invoke.cont:                                      ; preds = %entry
  br label %try.cont

lpad:                                             ; preds = %entry
  %0 = landingpad { i8*, i32 }
          catch i8* bitcast (i8** @_ZTIi to i8*)
          catch i8* null
  %1 = extractvalue { i8*, i32 } %0, 0
  %2 = extractvalue { i8*, i32 } %0, 1
  br label %catch.dispatch
; CHECK: lpad:
; CHECK-NEXT: %[[FMC:.*]] = call i8* @___cxa_find_matching_catch_4(i8* bitcast (i8** @_ZTIi to i8*), i8* null)
; CHECK-NEXT: %[[IVI1:.*]] = insertvalue { i8*, i32 } undef, i8* %[[FMC]], 0
; CHECK-NEXT: %[[TEMPRET0_VAL:.*]] = load i32, i32* @[[TEMPRET0]]
; CHECK-NEXT: %[[IVI2:.*]] = insertvalue { i8*, i32 } %[[IVI1]], i32 %[[TEMPRET0_VAL]], 1
; CHECK-NEXT: extractvalue { i8*, i32 } %[[IVI2]], 0
; CHECK-NEXT: extractvalue { i8*, i32 } %[[IVI2]], 1

catch.dispatch:                                   ; preds = %lpad
  %3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
  %matches = icmp eq i32 %2, %3
  br i1 %matches, label %catch1, label %catch

catch1:                                           ; preds = %catch.dispatch
  %4 = call i8* @__cxa_begin_catch(i8* %1)
  %5 = bitcast i8* %4 to i32*
  %6 = load i32, i32* %5, align 4
  call void @__cxa_end_catch()
  br label %try.cont

try.cont:                                         ; preds = %catch, %catch1, %invoke.cont
  ret void

catch:                                            ; preds = %catch.dispatch
  %7 = call i8* @__cxa_begin_catch(i8* %1)
  call void @__cxa_end_catch()
  br label %try.cont
}

; Test invoke instruction with filters (functions with throw(...) declaration)
define void @filter() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
; CHECK-LABEL: @filter(
entry:
  invoke void @foo(i32 3)
          to label %invoke.cont unwind label %lpad
; CHECK: entry:
; CHECK-NEXT: store i1 false, i1* @[[__THREW__]]
; CHECK-NEXT: call void @__invoke_void_i32(void (i32)* @foo, i32 3)
; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i1, i1* @[[__THREW__]]
; CHECK-NEXT: store i1 false, i1* @[[__THREW__]]
; CHECK-NEXT: br i1 %[[__THREW__VAL]], label %lpad, label %invoke.cont

invoke.cont:                                      ; preds = %entry
  ret void

lpad:                                             ; preds = %entry
  %0 = landingpad { i8*, i32 }
          filter [2 x i8*] [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTIc to i8*)]
  %1 = extractvalue { i8*, i32 } %0, 0
  %2 = extractvalue { i8*, i32 } %0, 1
  br label %filter.dispatch
; CHECK: lpad:
; CHECK-NEXT: %[[FMC:.*]] = call i8* @___cxa_find_matching_catch_4(i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTIc to i8*))
; CHECK-NEXT: %[[IVI1:.*]] = insertvalue { i8*, i32 } undef, i8* %[[FMC]], 0
; CHECK-NEXT: %[[TEMPRET0_VAL:.*]] = load i32, i32* @[[TEMPRET0]]
; CHECK-NEXT: %[[IVI2:.*]] = insertvalue { i8*, i32 } %[[IVI1]], i32 %[[TEMPRET0_VAL]], 1
; CHECK-NEXT: extractvalue { i8*, i32 } %[[IVI2]], 0
; CHECK-NEXT: extractvalue { i8*, i32 } %[[IVI2]], 1

filter.dispatch:                                  ; preds = %lpad
  %ehspec.fails = icmp slt i32 %2, 0
  br i1 %ehspec.fails, label %ehspec.unexpected, label %eh.resume

ehspec.unexpected:                                ; preds = %filter.dispatch
  call void @__cxa_call_unexpected(i8* %1) #4
  unreachable

eh.resume:                                        ; preds = %filter.dispatch
  %lpad.val = insertvalue { i8*, i32 } undef, i8* %1, 0
  %lpad.val3 = insertvalue { i8*, i32 } %lpad.val, i32 %2, 1
  resume { i8*, i32 } %lpad.val3
; CHECK: eh.resume:
; CHECK-NEXT: insertvalue
; CHECK-NEXT: %[[LPAD_VAL:.*]] = insertvalue
; CHECK-NEXT: %[[LOW:.*]] = extractvalue { i8*, i32 } %[[LPAD_VAL]], 0
; CHECK-NEXT: call void @___resumeException(i8* %[[LOW]])
; CHECK-NEXT: unreachable
}

declare void @foo(i32)

declare i32 @__gxx_personality_v0(...)
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @__cxa_call_unexpected(i8*)

; JS glue functions and invoke wrappers registration
; CHECK: declare void @___resumeException(i8*)
; CHECK: declare void @__invoke_void_i32(void (i32)*, i32)
; CHECK: declare i8* @___cxa_find_matching_catch_4(i8*, i8*)

; setThrew function creation
; CHECK-LABEL: define void @setThrew(i1 %threw, i32 %value) {
; CHECK: entry:
; CHECK-NEXT: %__THREW__.val = load i1, i1* @__THREW__
; CHECK-NEXT: %cmp = icmp eq i1 %__THREW__.val, false
; CHECK-NEXT: br i1 %cmp, label %if.then, label %if.end
; CHECK: if.then:
; CHECK-NEXT: store i1 %threw, i1* @__THREW__
; CHECK-NEXT: store i32 %value, i32* @threwValue
; CHECK-NEXT: br label %if.end
; CHECK: if.end:
; CHECK-NEXT: ret void
; CHECK: }

; setTempRet0 function creation
; CHECK-LABEL: define void @setTempRet0(i32 %value) {
; CHECK: entry:
; CHECK-NEXT: store i32 %value, i32* @tempRet0
; CHECK-NEXT: ret void
; CHECK: }