test/CodeGen/ARM/ifcvt_triangleWoCvtToNextEdge.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumb-apple-ios -run-pass=if-converter %s -o - | FileCheck %s

# bb.2 has no successors, presumably because __stack_chk_fail doesn't return,
# so there should be no edge from bb.2 to bb.3.
# Nevertheless, IfConversion treats bb.1, bb.2, bb.3 as a triangle and
# inserts a predicated copy of bb.2 in bb.1.

# This caused r302876 to die with a failed assertion.

--- |
  declare void @__stack_chk_fail()
  declare void @bar()

  define void @foo() {
    ret void
  }
...
---
name:            foo
body:             |
  ; CHECK-LABEL: name: foo
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.2(0x40000000), %bb.1(0x40000000)
  ; CHECK:   tBcc %bb.2, 1 /* CC::ne */, $cpsr
  ; CHECK: bb.1:
  ; CHECK:   successors:
  ; CHECK:   tBL 14 /* CC::al */, $cpsr, @__stack_chk_fail
  ; CHECK: bb.2:
  ; CHECK:   tBL 1 /* CC::ne */, $cpsr, @__stack_chk_fail
  ; CHECK:   $sp = tADDspi $sp, 2, 14 /* CC::al */, $noreg
  ; CHECK:   $sp = tADDspi $sp, 2, 14 /* CC::al */, $noreg
  ; CHECK:   tTAILJMPdND @bar, 14 /* CC::al */, $cpsr

  bb.0:
    tBcc %bb.1, 1, $cpsr
    tB %bb.2, 14, $noreg

  bb.1:
    tBcc %bb.3, 0, $cpsr

  bb.2:
  successors:
    tBL 14, $cpsr, @__stack_chk_fail

  bb.3:
  successors:
    $sp = tADDspi $sp, 2, 14, _
    $sp = tADDspi $sp, 2, 14, _
    tTAILJMPdND @bar, 14, $cpsr
...