llvm/test/Analysis/LazyCallGraph/basic.ll

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

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

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

define void ()* @test1(void ()** %x) personality i32 (...)* @__gxx_personality_v0 {
; CHECK-LABEL: Edges in function: test1
; CHECK-NEXT: call -> f6
; CHECK-NEXT: call -> f10
; CHECK-NEXT: ref -> f12
; CHECK-NEXT: ref -> f11
; CHECK-NEXT: ref -> f7
; CHECK-NEXT: ref -> f9
; CHECK-NEXT: ref -> f8
; CHECK-NEXT: ref -> f5
; CHECK-NEXT: ref -> f4
; CHECK-NEXT: ref -> f3
; CHECK-NEXT: ref -> f2
; CHECK-NEXT: ref -> 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 }
          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: Edges in function: test2
; CHECK-NEXT: ref -> f7
; CHECK-NEXT: ref -> f6
; CHECK-NEXT: ref -> f5
; CHECK-NEXT: ref -> f4
; CHECK-NEXT: ref -> f3
; CHECK-NEXT: ref -> f2
; CHECK-NEXT: ref -> f1
; CHECK-NOT: ->

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

@test3_ptr = external global void ()*

define void @test3_aa1() {
; CHECK-LABEL: Edges in function: test3_aa1
; CHECK-NEXT: call -> test3_aa2
; CHECK-NEXT: ref -> test3_ab1
; CHECK-NOT: ->

entry:
  call void @test3_aa2()
  store void ()* @test3_ab1, void ()** @test3_ptr
  ret void
}

define void @test3_aa2() {
; CHECK-LABEL: Edges in function: test3_aa2
; CHECK-NEXT: call -> test3_aa1
; CHECK-NEXT: call -> test3_ab2
; CHECK-NOT: ->

entry:
  call void @test3_aa1()
  call void @test3_ab2()
  ret void
}

define void @test3_ab1() {
; CHECK-LABEL: Edges in function: test3_ab1
; CHECK-NEXT: call -> test3_ab2
; CHECK-NEXT: call -> test3_ac1
; CHECK-NOT: ->

entry:
  call void @test3_ab2()
  call void @test3_ac1()
  ret void
}

define void @test3_ab2() {
; CHECK-LABEL: Edges in function: test3_ab2
; CHECK-NEXT: call -> test3_ab1
; CHECK-NEXT: call -> test3_ba1
; CHECK-NOT: ->

entry:
  call void @test3_ab1()
  call void @test3_ba1()
  ret void
}

define void @test3_ac1() {
; CHECK-LABEL: Edges in function: test3_ac1
; CHECK-NEXT: call -> test3_ac2
; CHECK-NEXT: ref -> test3_aa2
; CHECK-NOT: ->

entry:
  call void @test3_ac2()
  store void ()* @test3_aa2, void ()** @test3_ptr
  ret void
}

define void @test3_ac2() {
; CHECK-LABEL: Edges in function: test3_ac2
; CHECK-NEXT: call -> test3_ac1
; CHECK-NEXT: ref -> test3_ba1
; CHECK-NOT: ->

entry:
  call void @test3_ac1()
  store void ()* @test3_ba1, void ()** @test3_ptr
  ret void
}

define void @test3_ba1() {
; CHECK-LABEL: Edges in function: test3_ba1
; CHECK-NEXT: call -> test3_bb1
; CHECK-NEXT: ref -> test3_ca1
; CHECK-NOT: ->

entry:
  call void @test3_bb1()
  store void ()* @test3_ca1, void ()** @test3_ptr
  ret void
}

define void @test3_bb1() {
; CHECK-LABEL: Edges in function: test3_bb1
; CHECK-NEXT: call -> test3_ca2
; CHECK-NEXT: ref -> test3_ba1
; CHECK-NOT: ->

entry:
  call void @test3_ca2()
  store void ()* @test3_ba1, void ()** @test3_ptr
  ret void
}

define void @test3_ca1() {
; CHECK-LABEL: Edges in function: test3_ca1
; CHECK-NEXT: call -> test3_ca2
; CHECK-NOT: ->

entry:
  call void @test3_ca2()
  ret void
}

define void @test3_ca2() {
; CHECK-LABEL: Edges in function: test3_ca2
; CHECK-NEXT: call -> test3_ca3
; CHECK-NOT: ->

entry:
  call void @test3_ca3()
  ret void
}

define void @test3_ca3() {
; CHECK-LABEL: Edges in function: test3_ca3
; CHECK-NEXT: call -> test3_ca1
; CHECK-NOT: ->

entry:
  call void @test3_ca1()
  ret void
}

; Verify the SCCs formed.
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f1
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f2
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f3
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f4
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f5
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f6
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f7
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f8
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f9
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f10
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f11
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      f12
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      test0
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      test1
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      test2
;
; CHECK-LABEL: RefSCC with 1 call SCCs:
; CHECK-NEXT:    SCC with 3 functions:
; CHECK-NEXT:      test3_ca2
; CHECK-NEXT:      test3_ca3
; CHECK-NEXT:      test3_ca1
;
; CHECK-LABEL: RefSCC with 2 call SCCs:
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      test3_bb1
; CHECK-NEXT:    SCC with 1 functions:
; CHECK-NEXT:      test3_ba1
;
; CHECK-LABEL: RefSCC with 3 call SCCs:
; CHECK-NEXT:    SCC with 2 functions:
; CHECK-NEXT:      test3_ac1
; CHECK-NEXT:      test3_ac2
; CHECK-NEXT:    SCC with 2 functions:
; CHECK-NEXT:      test3_ab2
; CHECK-NEXT:      test3_ab1
; CHECK-NEXT:    SCC with 2 functions:
; CHECK-NEXT:      test3_aa1
; CHECK-NEXT:      test3_aa2