llvm/test/CodeGen/WebAssembly/wasmehprepare.ll

; RUN: opt < %s -winehprepare -demote-catchswitch-only -wasmehprepare -S | FileCheck %s

target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"

; CHECK: @__wasm_lpad_context = external global { i32, i8*, i32 }

@_ZTIi = external constant i8*
%struct.Cleanup = type { i8 }

; A single 'catch (int)' clause.
; A wasm.catch() call, wasm.lsda() call, and personality call to generate a
; selector should all be genereated after the catchpad.
define void @test0() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
; CHECK-LABEL: @test0()
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
; CHECK: catch.start:
; CHECK-NEXT:   %[[CATCHPAD:.*]] = catchpad
; CHECK-NEXT:   %[[EXN:.*]] = call i8* @llvm.wasm.catch(i32 0)
; CHECK-NEXT:   call void @llvm.wasm.landingpad.index(i32 0)
; CHECK-NEXT:   store i32 0, i32* getelementptr inbounds ({ i32, i8*, i32 }, { i32, i8*, i32 }* @__wasm_lpad_context, i32 0, i32 0)
; CHECK-NEXT:   %[[LSDA:.*]] = call i8* @llvm.wasm.lsda()
; CHECK-NEXT:   store i8* %[[LSDA]], i8** getelementptr inbounds ({ i32, i8*, i32 }, { i32, i8*, i32 }* @__wasm_lpad_context, i32 0, i32 1)
; CHECK-NEXT:   call i32 @_Unwind_CallPersonality(i8* %[[EXN]]) {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
; CHECK-NEXT:   %[[SELECTOR:.*]] = load i32, i32* getelementptr inbounds ({ i32, i8*, i32 }, { i32, i8*, i32 }* @__wasm_lpad_context, i32 0, i32 2)
; CHECK:   icmp eq i32 %[[SELECTOR]]

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
; CHECK: catch:
; CHECK-NEXT:  call i8* @__cxa_begin_catch(i8* %[[EXN]])

rethrow:                                          ; preds = %catch.start
  call void @__cxa_rethrow() [ "funclet"(token %1) ]
  unreachable

try.cont:                                         ; preds = %entry, %catch
  ret void
}

; Two try-catches, one of them is with a single 'catch (...)' clause.
; For the catchpad with a single 'catch (...)', only a wasm.catch() call should
; be generated after the catchpad; wasm.landingpad.index() and personality call
; should NOT be generated. For the other catchpad, the argument of
; wasm.landingpad.index() should be not 1 but 0.
define void @test1() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
; CHECK-LABEL: @test1()
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
; CHECK: catch.start:
; CHECK-NEXT:   catchpad within %0 [i8* null]
; CHECK-NEXT:   call i8* @llvm.wasm.catch(i32 0)
; CHECK-NOT:   call void @llvm.wasm.landingpad.index
; CHECK-NOT:   store {{.*}} @__wasm_lpad_context
; CHECK-NOT:   call i8* @llvm.wasm.lsda()
; CHECK-NOT:   call i32 @_Unwind_CallPersonality
; CHECK-NOT:   load {{.*}} @__wasm_lpad_context

try.cont:                                         ; preds = %entry, %catch.start
  invoke void @foo()
          to label %try.cont7 unwind label %catch.dispatch2

catch.dispatch2:                                  ; preds = %try.cont
  %5 = catchswitch within none [label %catch.start3] unwind to caller

catch.start3:                                     ; preds = %catch.dispatch2
  %6 = catchpad within %5 [i8* bitcast (i8** @_ZTIi to i8*)]
  %7 = call i8* @llvm.wasm.get.exception(token %6)
  %8 = call i32 @llvm.wasm.get.ehselector(token %6)
  %9 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
  %matches = icmp eq i32 %8, %9
  br i1 %matches, label %catch4, label %rethrow
; CHECK: catch.start3:
; CHECK:   call void @llvm.wasm.landingpad.index(i32 0)

catch4:                                           ; preds = %catch.start3
  %10 = call i8* @__cxa_begin_catch(i8* %7) [ "funclet"(token %6) ]
  call void @__cxa_end_catch() [ "funclet"(token %6) ]
  catchret from %6 to label %try.cont7

rethrow:                                          ; preds = %catch.start3
  call void @__cxa_rethrow() [ "funclet"(token %6) ]
  unreachable

try.cont7:                                        ; preds = %try.cont, %catch4
  ret void
}

; A nested try-catch within a catch. Within the nested catchpad, wasm.lsda()
; call should NOT be generated.
define void @test2() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
; CHECK-LABEL: @test2()
entry:
  invoke void @foo()
          to label %try.cont9 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
; CHECK: catch.start:
; CHECK:   call i8* @llvm.wasm.lsda()

catch:                                            ; preds = %catch.start
  %5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
  invoke void @foo() [ "funclet"(token %1) ]
          to label %try.cont unwind label %catch.dispatch2

catch.dispatch2:                                  ; preds = %catch
  %6 = catchswitch within %1 [label %catch.start3] unwind label %ehcleanup

catch.start3:                                     ; preds = %catch.dispatch2
  %7 = catchpad within %6 [i8* bitcast (i8** @_ZTIi to i8*)]
  %8 = call i8* @llvm.wasm.get.exception(token %7)
  %9 = call i32 @llvm.wasm.get.ehselector(token %7)
  %10 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
  %matches4 = icmp eq i32 %9, %10
  br i1 %matches4, label %catch6, label %rethrow5
; CHECK: catch.start3:
; CHECK-NOT:   call i8* @llvm.wasm.lsda()

catch6:                                           ; preds = %catch.start3
  %11 = call i8* @__cxa_begin_catch(i8* %8) [ "funclet"(token %7) ]
  call void @__cxa_end_catch() [ "funclet"(token %7) ]
  catchret from %7 to label %try.cont

rethrow5:                                         ; preds = %catch.start3
  invoke void @__cxa_rethrow() [ "funclet"(token %7) ]
          to label %unreachable unwind label %ehcleanup

try.cont:                                         ; preds = %catch, %catch6
  call void @__cxa_end_catch() [ "funclet"(token %1) ]
  catchret from %1 to label %try.cont9

rethrow:                                          ; preds = %catch.start
  call void @__cxa_rethrow() [ "funclet"(token %1) ]
  unreachable

try.cont9:                                        ; preds = %entry, %try.cont
  ret void

ehcleanup:                                        ; preds = %rethrow5, %catch.dispatch2
  %12 = cleanuppad within %1 []
  call void @__cxa_end_catch() [ "funclet"(token %12) ]
  cleanupret from %12 unwind to caller
; CHECK: ehcleanup:
; CHECK-NEXT:   cleanuppad
; CHECK-NOT:   call i8* @llvm.wasm.catch(i32 0)
; CHECK-NOT:   call void @llvm.wasm.landingpad.index
; CHECK-NOT:   store {{.*}} @__wasm_lpad_context
; CHECK-NOT:   call i8* @llvm.wasm.lsda()
; CHECK-NOT:   call i32 @_Unwind_CallPersonality
; CHECK-NOT:   load {{.*}} @__wasm_lpad_context

unreachable:                                      ; preds = %rethrow5
  unreachable
}

; A cleanuppad with a call to __clang_call_terminate().
; A call to wasm.catch() should be generated after the cleanuppad.
define hidden void @test3() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
; CHECK-LABEL: @test3
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 = %entry, %invoke.cont1
  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
; CHECK: terminate:
; CHECK-NEXT: cleanuppad
; CHECK-NEXT:   %[[EXN:.*]] = call i8* @llvm.wasm.catch(i32 0)
; CHECK-NEXT:   call void @__clang_call_terminate(i8* %[[EXN]])
}

; PHI demotion test. Only the phi before catchswitch should be demoted; the phi
; before cleanuppad should NOT.
define void @test5() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
; CHECK-LABEL: @test5
entry:
  %c = alloca %struct.Cleanup, align 1
  invoke void @foo()
          to label %invoke.cont unwind label %ehcleanup

invoke.cont:                                      ; preds = %entry
  invoke void @foo()
          to label %invoke.cont1 unwind label %ehcleanup

invoke.cont1:                                     ; preds = %invoke.cont
  %call = call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c)
  br label %try.cont

ehcleanup:                                        ; preds = %invoke.cont, %entry
  %num.0 = phi i32 [ 2, %invoke.cont ], [ 1, %entry ]
  %0 = cleanuppad within none []
  %call2 = call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c) [ "funclet"(token %0) ]
  cleanupret from %0 unwind label %catch.dispatch
; CHECK: ehcleanup:
; CHECK-NEXT:   = phi

catch.dispatch:                                   ; preds = %ehcleanup
  %1 = catchswitch within none [label %catch.start] unwind to caller

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)
  %5 = call i8* @__cxa_begin_catch(i8* %3) [ "funclet"(token %2) ]
  call void @func(i32 %num.0) [ "funclet"(token %2) ]
  call void @__cxa_end_catch() [ "funclet"(token %2) ]
  catchret from %2 to label %try.cont

try.cont:                                         ; preds = %catch.start, %invoke.cont1
  invoke void @foo()
          to label %invoke.cont3 unwind label %catch.dispatch5

invoke.cont3:                                     ; preds = %try.cont
  invoke void @foo()
          to label %try.cont10 unwind label %catch.dispatch5

catch.dispatch5:                                  ; preds = %invoke.cont3, %try.cont
  %num.1 = phi i32 [ 2, %invoke.cont3 ], [ 1, %try.cont ]
  %6 = catchswitch within none [label %catch.start6] unwind to caller
; CHECK: catch.dispatch5:
; CHECK-NOT:   = phi

catch.start6:                                     ; preds = %catch.dispatch5
  %7 = catchpad within %6 [i8* null]
  %8 = call i8* @llvm.wasm.get.exception(token %7)
  %9 = call i32 @llvm.wasm.get.ehselector(token %7)
  %10 = call i8* @__cxa_begin_catch(i8* %8) [ "funclet"(token %7) ]
  call void @func(i32 %num.1) [ "funclet"(token %7) ]
  call void @__cxa_end_catch() [ "funclet"(token %7) ]
  catchret from %7 to label %try.cont10

try.cont10:                                       ; preds = %invoke.cont3, %catch.start6
  ret void
}

declare void @foo()
declare void @func(i32)
declare %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* returned)
declare i32 @__gxx_wasm_personality_v0(...)
declare i8* @llvm.wasm.get.exception(token)
declare i32 @llvm.wasm.get.ehselector(token)
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @__cxa_rethrow()
declare void @__clang_call_terminate(i8*)

; CHECK-DAG: declare i8* @llvm.wasm.catch(i32)
; CHECK-DAG: declare void @llvm.wasm.landingpad.index(i32)
; CHECK-DAG: declare i8* @llvm.wasm.lsda()
; CHECK-DAG: declare i32 @_Unwind_CallPersonality(i8*)