llvm/test/Transforms/LoopInterchange/invoke.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -passes=loop-interchange -loop-interchange-profitabilities=ignore -S | FileCheck %s

@g = global i64 0
declare void @rd(ptr)
declare i32 @__gxx_personality_v0(...)

; The following loops must not be interchanged because the invocation of @rd
; may read or write the memory.
;
define void @invoke_may_rw() personality ptr @__gxx_personality_v0 {
; CHECK-LABEL: define void @invoke_may_rw() personality ptr @__gxx_personality_v0 {
; CHECK-NEXT:  [[I_HEADER:.*]]:
; CHECK-NEXT:    br label %[[J_HEADER_PREHEADER:.*]]
; CHECK:       [[J_HEADER_PREHEADER]]:
; CHECK-NEXT:    [[I:%.*]] = phi i64 [ 0, %[[I_HEADER]] ], [ [[I_NEXT:%.*]], %[[I_LATCH:.*]] ]
; CHECK-NEXT:    br label %[[J_HEADER:.*]]
; CHECK:       [[J_HEADER]]:
; CHECK-NEXT:    [[J:%.*]] = phi i64 [ 0, %[[J_HEADER_PREHEADER]] ], [ [[TMP0:%.*]], %[[J_LATCH:.*]] ]
; CHECK-NEXT:    invoke void @rd(ptr @g)
; CHECK-NEXT:            to label %[[J_LATCH]] unwind label %[[LP:.*]]
; CHECK:       [[LP]]:
; CHECK-NEXT:    [[L:%.*]] = landingpad { ptr, i32 }
; CHECK-NEXT:            cleanup
; CHECK-NEXT:    br label %[[J_LATCH]]
; CHECK:       [[J_LATCH]]:
; CHECK-NEXT:    [[TMP0]] = add i64 [[J]], 1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i64 [[TMP0]], 8
; CHECK-NEXT:    br i1 [[TMP1]], label %[[I_LATCH]], label %[[J_HEADER]]
; CHECK:       [[I_LATCH]]:
; CHECK-NEXT:    [[I_NEXT]] = add i64 [[I]], 1
; CHECK-NEXT:    [[EC_I:%.*]] = icmp eq i64 [[I_NEXT]], 8
; CHECK-NEXT:    br i1 [[EC_I]], label %[[EXIT:.*]], label %[[J_HEADER_PREHEADER]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %i.header

i.header:
  %i = phi i64 [ 0, %entry ], [ %i.next, %i.latch ]
  br label %j.header

j.header:
  %j = phi i64 [ 0, %i.header ], [ %j.next, %j.latch ]
  invoke void @rd(ptr @g) to label %j.latch unwind label %lp

lp:
  %l = landingpad { ptr, i32 } cleanup
  br label %j.latch

j.latch:
  %j.next = add i64 %j, 1
  %ec.j = icmp eq i64 %j.next, 8
  br i1 %ec.j, label %i.latch, label %j.header

i.latch:
  %i.next = add i64 %i, 1
  %ec.i = icmp eq i64 %i.next, 8
  br i1 %ec.i, label %exit, label %i.header

exit:
  ret void
}