third_party/llvm-7.0/llvm/test/CodeGen/ARM/ifcvt-iter-indbr.ll

; RUN: llc < %s -mtriple thumbv7s-apple-darwin  -asm-verbose=false | FileCheck %s
; RUN: llc < %s -mtriple thumbv7s-apple-darwin  -asm-verbose=false -print-machineinstrs=if-converter 2>&1 | FileCheck --check-prefix=CHECK-PROB %s

declare i32 @foo(i32)
declare i8* @bar(i32, i8*, i8*)

; Verify that we don't try to iteratively re-ifconvert a block with a
; (predicated) indirectbr terminator.
; If we do, we would ignore its fallthrough successor.


; CHECK-LABEL: test:
; CHECK:       cmp {{.*}}, #21
; CHECK-NEXT:  itt eq
; CHECK-NEXT:  streq.w
; CHECK-NEXT:  moveq pc
; CHECK-NEXT: LBB{{[0-9_]+}}:
; CHECK-NEXT:  cmp {{.*}}, #42
; CHECK-NEXT:  beq [[CALL_FOO_1234:LBB[0-9_]+]]
; CHECK-NEXT:  ldr {{.*}}[sp
; CHECK-NEXT:  str
; CHECK-NEXT:  mov pc
; CHECK-NEXT: Ltmp
; CHECK-NEXT: [[CALL_FOO_1234]]:
; CHECK-NEXT:  movw r0, #1234
; CHECK-NEXT:  b [[FOOCALL:LBB[0-9_]+]]
; CHECK-NEXT: Ltmp
; CHECK-NEXT: LBB{{[0-9_]+}}:
; CHECK-NEXT:  movw r0, #4567
; CHECK-NEXT: [[FOOCALL]]:
; CHECK-NEXT:  bl _foo
;
; CHECK-PROB: bb.0{{[0-9a-zA-Z.]*}}:
; CHECK-PROB: successors: %bb.1(0x40000000), %bb.3(0x20000000), %bb.5(0x20000000)
; CHECK-PROB: bb.2{{[0-9a-zA-Z.]*}}:
; CHECK-PROB: successors: %bb.3(0x40000000), %bb.5(0x40000000)

define i32 @test(i32 %a, i32 %a2, i32* %p, i32* %p2) "no-frame-pointer-elim"="true" {
entry:
  %dst1 = call i8* @bar(i32 1, i8* blockaddress(@test, %bb1), i8* blockaddress(@test, %bb2))
  %dst2 = call i8* @bar(i32 2, i8* blockaddress(@test, %bb1), i8* blockaddress(@test, %bb2))
  %dst3 = call i8* @bar(i32 3, i8* blockaddress(@test, %bb1), i8* blockaddress(@test, %bb2))
  %cc1 = icmp eq i32 %a, 21
  br i1 %cc1, label %cc1t, label %cc1f

cc1t:
  store i32 %a, i32* %p
  indirectbr i8* %dst3, [label %bb1, label %bb2]

cc1f:
  %cc2 = icmp ne i32 %a2, 42
  br i1 %cc2, label %cc2t, label %bb1
cc2t:
  store i32 %a, i32* %p2
  indirectbr i8* %dst1, [label %bb1, label %bb2]

bb1:
  %ret_bb1 = call i32 @foo(i32 1234)
  ret i32 %ret_bb1
bb2:
  %ret_bb2 = call i32 @foo(i32 4567)
  ret i32 %ret_bb2
}