test/Transforms/FunctionAttrs/nounwind.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
; RUN: opt -passes=function-attrs -S < %s | FileCheck --check-prefixes=COMMON,FNATTRS %s
; RUN: opt -passes=attributor-light -S < %s | FileCheck --check-prefixes=COMMON,ATTRIBUTOR %s

; TEST 1
define i32 @foo1() {
; COMMON: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; COMMON-LABEL: define {{[^@]+}}@foo1
; COMMON-SAME: () #[[ATTR0:[0-9]+]] {
; COMMON-NEXT:    ret i32 1
;
  ret i32 1
}

; TEST 2
define i32 @scc1_foo() {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(none)
; FNATTRS-LABEL: define {{[^@]+}}@scc1_foo
; FNATTRS-SAME: () #[[ATTR1:[0-9]+]] {
; FNATTRS-NEXT:    [[TMP1:%.*]] = call i32 @scc1_bar()
; FNATTRS-NEXT:    ret i32 1
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(none)
; ATTRIBUTOR-LABEL: define {{[^@]+}}@scc1_foo
; ATTRIBUTOR-SAME: () #[[ATTR1:[0-9]+]] {
; ATTRIBUTOR-NEXT:    [[TMP1:%.*]] = call i32 @scc1_bar() #[[ATTR1]]
; ATTRIBUTOR-NEXT:    ret i32 1
;
  %1 = call i32 @scc1_bar()
  ret i32 1
}


; TEST 3
define i32 @scc1_bar() {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(none)
; FNATTRS-LABEL: define {{[^@]+}}@scc1_bar
; FNATTRS-SAME: () #[[ATTR1]] {
; FNATTRS-NEXT:    [[TMP1:%.*]] = call i32 @scc1_foo()
; FNATTRS-NEXT:    ret i32 1
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(none)
; ATTRIBUTOR-LABEL: define {{[^@]+}}@scc1_bar
; ATTRIBUTOR-SAME: () #[[ATTR1]] {
; ATTRIBUTOR-NEXT:    [[TMP1:%.*]] = call i32 @scc1_foo() #[[ATTR1]]
; ATTRIBUTOR-NEXT:    ret i32 1
;
  %1 = call i32 @scc1_foo()
  ret i32 1
}

declare i32 @non_nounwind()

; TEST 4
define void @call_non_nounwind(){
; COMMON-LABEL: define {{[^@]+}}@call_non_nounwind() {
; COMMON-NEXT:    [[TMP1:%.*]] = tail call i32 @non_nounwind()
; COMMON-NEXT:    ret void
;
  tail call i32 @non_nounwind()
  ret void
}

; TEST 5 - throw
; int maybe_throw(bool canThrow) {
;   if (canThrow)
;     throw;
;   else
;     return -1;
; }

define i32 @maybe_throw(i1 zeroext %0) {
; COMMON-LABEL: define {{[^@]+}}@maybe_throw
; COMMON-SAME: (i1 zeroext [[TMP0:%.*]]) {
; COMMON-NEXT:    br i1 [[TMP0]], label [[TMP2:%.*]], label [[TMP3:%.*]]
; COMMON:       2:
; COMMON-NEXT:    tail call void @__cxa_rethrow()
; COMMON-NEXT:    unreachable
; COMMON:       3:
; COMMON-NEXT:    ret i32 -1
;
  br i1 %0, label %2, label %3

2:                                                ; preds = %1
  tail call void @__cxa_rethrow() #1
  unreachable

3:                                                ; preds = %1
  ret i32 -1
}

declare void @__cxa_rethrow()

; TEST 6 - catch
; int catch_thing() {
;   try {
;       int a = doThing(true);
;   }
;   catch(...) { return -1; }
;   return 1;
; }

define i32 @catch_thing() personality ptr @__gxx_personality_v0 {
; COMMON-LABEL: define {{[^@]+}}@catch_thing() personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @__cxa_rethrow()
; COMMON-NEXT:    to label [[TMP1:%.*]] unwind label [[TMP2:%.*]]
; COMMON:       1:
; COMMON-NEXT:    unreachable
; COMMON:       2:
; COMMON-NEXT:    [[TMP3:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    catch ptr null
; COMMON-NEXT:    [[TMP4:%.*]] = extractvalue { ptr, i32 } [[TMP3]], 0
; COMMON-NEXT:    [[TMP5:%.*]] = tail call ptr @__cxa_begin_catch(ptr [[TMP4]])
; COMMON-NEXT:    tail call void @__cxa_end_catch()
; COMMON-NEXT:    ret i32 -1
;
  invoke void @__cxa_rethrow() #1
  to label %1 unwind label %2

1:                                                ; preds = %0
  unreachable

2:                                                ; preds = %0
  %3 = landingpad { ptr, i32 }
  catch ptr null
  %4 = extractvalue { ptr, i32 } %3, 0
  %5 = tail call ptr @__cxa_begin_catch(ptr %4) #2
  tail call void @__cxa_end_catch()
  ret i32 -1
}

define i32 @catch_thing_user() {
; COMMON-LABEL: define {{[^@]+}}@catch_thing_user() {
; COMMON-NEXT:    [[CATCH_THING_CALL:%.*]] = call i32 @catch_thing()
; COMMON-NEXT:    ret i32 [[CATCH_THING_CALL]]
;
  %catch_thing_call = call i32 @catch_thing()
  ret i32 %catch_thing_call
}

declare void @do_throw()
declare void @abort() nounwind
@catch_ty = external global ptr

define void @catch_specific_landingpad() personality ptr @__gxx_personality_v0 {
; COMMON: Function Attrs: noreturn
; COMMON-LABEL: define {{[^@]+}}@catch_specific_landingpad
; COMMON-SAME: () #[[ATTR3:[0-9]+]] personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @do_throw()
; COMMON-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[LPAD:%.*]]
; COMMON:       lpad:
; COMMON-NEXT:    [[LP:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    catch ptr @catch_ty
; COMMON-NEXT:    call void @abort()
; COMMON-NEXT:    unreachable
; COMMON:       unreachable:
; COMMON-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %lpad

lpad:
  %lp = landingpad { ptr, i32 }
  catch ptr @catch_ty
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @catch_all_landingpad() personality ptr @__gxx_personality_v0 {
; COMMON: Function Attrs: noreturn nounwind
; COMMON-LABEL: define {{[^@]+}}@catch_all_landingpad
; COMMON-SAME: () #[[ATTR4:[0-9]+]] personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @do_throw()
; COMMON-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[LPAD:%.*]]
; COMMON:       lpad:
; COMMON-NEXT:    [[LP:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    catch ptr null
; COMMON-NEXT:    call void @abort()
; COMMON-NEXT:    unreachable
; COMMON:       unreachable:
; COMMON-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %lpad

lpad:
  %lp = landingpad { ptr, i32 }
  catch ptr null
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @filter_specific_landingpad() personality ptr @__gxx_personality_v0 {
; COMMON: Function Attrs: noreturn
; COMMON-LABEL: define {{[^@]+}}@filter_specific_landingpad
; COMMON-SAME: () #[[ATTR3]] personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @do_throw()
; COMMON-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[LPAD:%.*]]
; COMMON:       lpad:
; COMMON-NEXT:    [[LP:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    filter [1 x ptr] [ptr @catch_ty]
; COMMON-NEXT:    call void @abort()
; COMMON-NEXT:    unreachable
; COMMON:       unreachable:
; COMMON-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %lpad

lpad:
  %lp = landingpad { ptr, i32 }
  filter [1 x ptr] [ptr @catch_ty]
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @filter_none_landingpad() personality ptr @__gxx_personality_v0 {
; COMMON: Function Attrs: noreturn nounwind
; COMMON-LABEL: define {{[^@]+}}@filter_none_landingpad
; COMMON-SAME: () #[[ATTR4]] personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @do_throw()
; COMMON-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[LPAD:%.*]]
; COMMON:       lpad:
; COMMON-NEXT:    [[LP:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    filter [0 x ptr] zeroinitializer
; COMMON-NEXT:    call void @abort()
; COMMON-NEXT:    unreachable
; COMMON:       unreachable:
; COMMON-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %lpad

lpad:
  %lp = landingpad { ptr, i32 }
  filter [0 x ptr] zeroinitializer
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @cleanup_landingpad() personality ptr @__gxx_personality_v0 {
; COMMON: Function Attrs: noreturn
; COMMON-LABEL: define {{[^@]+}}@cleanup_landingpad
; COMMON-SAME: () #[[ATTR3]] personality ptr @__gxx_personality_v0 {
; COMMON-NEXT:    invoke void @do_throw()
; COMMON-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[LPAD:%.*]]
; COMMON:       lpad:
; COMMON-NEXT:    [[LP:%.*]] = landingpad { ptr, i32 }
; COMMON-NEXT:    cleanup
; COMMON-NEXT:    call void @abort()
; COMMON-NEXT:    unreachable
; COMMON:       unreachable:
; COMMON-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %lpad

lpad:
  %lp = landingpad { ptr, i32 }
  cleanup
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @cleanuppad() personality ptr @__gxx_personality_v0 {
; FNATTRS: Function Attrs: noreturn
; FNATTRS-LABEL: define {{[^@]+}}@cleanuppad
; FNATTRS-SAME: () #[[ATTR3]] personality ptr @__gxx_personality_v0 {
; FNATTRS-NEXT:    invoke void @do_throw()
; FNATTRS-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[CPAD:%.*]]
; FNATTRS:       cpad:
; FNATTRS-NEXT:    [[CP:%.*]] = cleanuppad within none []
; FNATTRS-NEXT:    call void @abort()
; FNATTRS-NEXT:    unreachable
; FNATTRS:       unreachable:
; FNATTRS-NEXT:    unreachable
;
; ATTRIBUTOR: Function Attrs: noreturn nounwind
; ATTRIBUTOR-LABEL: define {{[^@]+}}@cleanuppad
; ATTRIBUTOR-SAME: () #[[ATTR4]] personality ptr @__gxx_personality_v0 {
; ATTRIBUTOR-NEXT:    invoke void @do_throw()
; ATTRIBUTOR-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[CPAD:%.*]]
; ATTRIBUTOR:       cpad:
; ATTRIBUTOR-NEXT:    [[CP:%.*]] = cleanuppad within none []
; ATTRIBUTOR-NEXT:    call void @abort()
; ATTRIBUTOR-NEXT:    unreachable
; ATTRIBUTOR:       unreachable:
; ATTRIBUTOR-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %cpad

cpad:
  %cp = cleanuppad within none []
  call void @abort()
  unreachable

unreachable:
  unreachable
}

define void @catchswitch_cleanuppad() personality ptr @__gxx_personality_v0 {
; FNATTRS: Function Attrs: noreturn
; FNATTRS-LABEL: define {{[^@]+}}@catchswitch_cleanuppad
; FNATTRS-SAME: () #[[ATTR3]] personality ptr @__gxx_personality_v0 {
; FNATTRS-NEXT:    invoke void @do_throw()
; FNATTRS-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[CS:%.*]]
; FNATTRS:       cs:
; FNATTRS-NEXT:    [[TOK:%.*]] = catchswitch within none [label %catch] unwind label [[CPAD:%.*]]
; FNATTRS:       catch:
; FNATTRS-NEXT:    [[C:%.*]] = catchpad within [[TOK]] [ptr @catch_ty, i32 0, ptr null]
; FNATTRS-NEXT:    call void @abort()
; FNATTRS-NEXT:    unreachable
; FNATTRS:       cpad:
; FNATTRS-NEXT:    [[CP:%.*]] = cleanuppad within none []
; FNATTRS-NEXT:    call void @abort()
; FNATTRS-NEXT:    unreachable
; FNATTRS:       unreachable:
; FNATTRS-NEXT:    unreachable
;
; ATTRIBUTOR: Function Attrs: noreturn nounwind
; ATTRIBUTOR-LABEL: define {{[^@]+}}@catchswitch_cleanuppad
; ATTRIBUTOR-SAME: () #[[ATTR4]] personality ptr @__gxx_personality_v0 {
; ATTRIBUTOR-NEXT:    invoke void @do_throw()
; ATTRIBUTOR-NEXT:    to label [[UNREACHABLE:%.*]] unwind label [[CS:%.*]]
; ATTRIBUTOR:       cs:
; ATTRIBUTOR-NEXT:    [[TOK:%.*]] = catchswitch within none [label %catch] unwind label [[CPAD:%.*]]
; ATTRIBUTOR:       catch:
; ATTRIBUTOR-NEXT:    [[C:%.*]] = catchpad within [[TOK]] [ptr @catch_ty, i32 0, ptr null]
; ATTRIBUTOR-NEXT:    call void @abort()
; ATTRIBUTOR-NEXT:    unreachable
; ATTRIBUTOR:       cpad:
; ATTRIBUTOR-NEXT:    [[CP:%.*]] = cleanuppad within none []
; ATTRIBUTOR-NEXT:    call void @abort()
; ATTRIBUTOR-NEXT:    unreachable
; ATTRIBUTOR:       unreachable:
; ATTRIBUTOR-NEXT:    unreachable
;
  invoke void @do_throw()
  to label %unreachable unwind label %cs

cs:
  %tok = catchswitch within none [label %catch] unwind label %cpad

catch:
  %c = catchpad within %tok [ptr @catch_ty, i32 0, ptr null]
  call void @abort()
  unreachable

cpad:
  %cp = cleanuppad within none []
  call void @abort()
  unreachable

unreachable:
  unreachable
}

declare i32 @__gxx_personality_v0(...)

declare ptr @__cxa_begin_catch(ptr)

declare void @__cxa_end_catch()