llvm/test/Transforms/FunctionSpecialization/reachable-after-specialization.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes=ipsccp  --funcspec-min-function-size=1 -S < %s | FileCheck %s

define i32 @caller() {
; CHECK-LABEL: define i32 @caller() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[CALL1:%.*]] = call i32 @callee.specialized.1(i32 1)
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @callee.specialized.2(i32 0)
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 undef, 0
; CHECK-NEXT:    br i1 [[COND]], label %[[COMMON_RET:.*]], label %[[IF_THEN:.*]]
; CHECK:       [[COMMON_RET]]:
; CHECK-NEXT:    ret i32 0
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 0
;
entry:
  %call1 = call i32 @callee(i32 1)
  %call2 = call i32 @callee(i32 0)
  %cond = icmp eq i32 %call2, 0
  br i1 %cond, label %common.ret, label %if.then

common.ret:                                       ; preds = %entry
  ret i32 0

if.then:                                         ; preds = %entry
  %unreachable_call = call i32 @callee(i32 2)
  ret i32 %unreachable_call
}

define internal i32 @callee(i32 %arg) {
entry:
  br label %loop

loop:                                               ; preds = %ai, %entry
  %add = or i32 0, 0
  %cond = icmp eq i32 %arg, 1
  br i1 %cond, label %exit, label %loop

exit:                                               ; preds = %ai
  ret i32 0
}

declare void @other_user(ptr)

define i32 @caller2() {
; CHECK-LABEL: define i32 @caller2() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    call void @other_user(ptr @callee2)
; CHECK-NEXT:    [[CALL1:%.*]] = call i32 @callee2.specialized.3(i32 1)
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @callee2.specialized.4(i32 0)
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 undef, 0
; CHECK-NEXT:    br i1 [[COND]], label %[[COMMON_RET:.*]], label %[[IF_THEN:.*]]
; CHECK:       [[COMMON_RET]]:
; CHECK-NEXT:    ret i32 0
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    [[UNREACHABLE_CALL:%.*]] = call i32 @callee2.specialized.7(i32 2)
; CHECK-NEXT:    ret i32 undef
;
entry:
  call void @other_user(ptr @callee2)
  %call1 = call i32 @callee2(i32 1)
  %call2 = call i32 @callee2(i32 0)
  %cond = icmp eq i32 %call2, 0
  br i1 %cond, label %common.ret, label %if.then

common.ret:                                       ; preds = %entry
  ret i32 0

if.then:                                         ; preds = %entry
  %unreachable_call = call i32 @callee2(i32 2)
  ret i32 %unreachable_call
}

define internal i32 @callee2(i32 %arg) {
; CHECK-LABEL: define internal i32 @callee2(
; CHECK-SAME: i32 [[ARG:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 [[ARG]], 1
; CHECK-NEXT:    br i1 [[COND]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %loop

loop:                                               ; preds = %ai, %entry
  %add = or i32 0, 0
  %cond = icmp eq i32 %arg, 1
  br i1 %cond, label %exit, label %loop

exit:                                               ; preds = %ai
  ret i32 0
}

define i32 @caller3(i32 %arg) {
; CHECK-LABEL: define range(i32 2, 1) i32 @caller3(
; CHECK-SAME: i32 [[ARG:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[CALL1:%.*]] = call i32 @callee3.specialized.5(i32 0)
; CHECK-NEXT:    [[CALL2:%.*]] = call i32 @callee3.specialized.6(i32 1)
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i32 undef, 0
; CHECK-NEXT:    br i1 [[COND]], label %[[COMMON_RET:.*]], label %[[IF_THEN:.*]]
; CHECK:       [[COMMON_RET]]:
; CHECK-NEXT:    ret i32 0
; CHECK:       [[IF_THEN]]:
; CHECK-NEXT:    ret i32 poison
;
entry:
  %call1 = call i32 @callee3(i32 0)
  %call2 = call i32 @callee3(i32 1)
  %cond = icmp eq i32 %call2, 0
  br i1 %cond, label %common.ret, label %if.then

common.ret:                                       ; preds = %entry
  ret i32 0

if.then:                                         ; preds = %entry
  %unreachable_call = call i32 @callee3(i32 %arg)
  ret i32 %unreachable_call
}

define internal i32 @callee3(i32 %arg) {
entry:
  br label %loop

loop:                                               ; preds = %ai, %entry
  %add = or i32 0, 0
  %cond = icmp ne i32 %arg, 1
  br i1 %cond, label %exit, label %loop

exit:                                               ; preds = %ai
  ret i32 %arg
}