llvm/test/Analysis/LazyCallGraph/basic.ll

; RUN: opt -disable-output -passes=print-cg %s 2>&1 | FileCheck %s
;
; Basic validation of the call graph analysis used in the new pass manager.

define void @f() {
; CHECK-LABEL: Call edges in function: f
; CHECK-NOT: ->

entry:
  ret void
}

; A bunch more functions just to make it easier to test several call edges at once.
define void @f1() {
  ret void
}
define void @f2() {
  ret void
}
define void @f3() {
  ret void
}
define void @f4() {
  ret void
}
define void @f5() {
  ret void
}
define void @f6() {
  ret void
}
define void @f7() {
  ret void
}
define void @f8() {
  ret void
}
define void @f9() {
  ret void
}
define void @f10() {
  ret void
}
define void @f11() {
  ret void
}
define void @f12() {
  ret void
}

declare i32 @__gxx_personality_v0(...)

define void @test0() {
; CHECK-LABEL: Call edges in function: test0
; CHECK-NEXT: -> f
; CHECK-NOT: ->

entry:
  call void @f()
  call void @f()
  call void @f()
  call void @f()
  ret void
}

define void ()* @test1(void ()** %x) {
; CHECK-LABEL: Call edges in function: test1
; CHECK-NEXT: -> f12
; CHECK-NEXT: -> f11
; CHECK-NEXT: -> f10
; CHECK-NEXT: -> f7
; CHECK-NEXT: -> f9
; CHECK-NEXT: -> f8
; CHECK-NEXT: -> f6
; CHECK-NEXT: -> f5
; CHECK-NEXT: -> f4
; CHECK-NEXT: -> f3
; CHECK-NEXT: -> f2
; CHECK-NEXT: -> f1
; CHECK-NOT: ->

entry:
  br label %next

dead:
  br label %next

next:
  phi void ()* [ @f1, %entry ], [ @f2, %dead ]
  select i1 true, void ()* @f3, void ()* @f4
  store void ()* @f5, void ()** %x
  call void @f6()
  call void (void ()*, void ()*)* bitcast (void ()* @f7 to void (void ()*, void ()*)*)(void ()* @f8, void ()* @f9)
  invoke void @f10() to label %exit unwind label %unwind

exit:
  ret void ()* @f11

unwind:
  %res = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
          cleanup
  resume { i8*, i32 } { i8* bitcast (void ()* @f12 to i8*), i32 42 }
}

@g = global void ()* @f1
@g1 = global [4 x void ()*] [void ()* @f2, void ()* @f3, void ()* @f4, void ()* @f5]
@g2 = global {i8, void ()*, i8} {i8 1, void ()* @f6, i8 2}
@h = constant void ()* @f7

define void @test2() {
; CHECK-LABEL: Call edges in function: test2
; CHECK-NEXT: -> f7
; CHECK-NEXT: -> f6
; CHECK-NEXT: -> f5
; CHECK-NEXT: -> f4
; CHECK-NEXT: -> f3
; CHECK-NEXT: -> f2
; CHECK-NEXT: -> f1
; CHECK-NOT: ->

  load i8** bitcast (void ()** @g to i8**)
  load i8** bitcast (void ()** getelementptr ([4 x void ()*]* @g1, i32 0, i32 2) to i8**)
  load i8** bitcast (void ()** getelementptr ({i8, void ()*, i8}* @g2, i32 0, i32 1) to i8**)
  load i8** bitcast (void ()** @h to i8**)
  ret void
}

; Verify the SCCs formed.
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f7
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f6
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f5
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f4
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f3
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f2
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f1
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    test2
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f12
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f11
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f10
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f9
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f8
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    test1
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    f
;
; CHECK-LABEL: SCC with 1 functions:
; CHECK-NEXT:    test0