llvm/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=loop-interchange -cache-line-size=64 -verify-dom-info -verify-loop-info -S 2>&1 | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

@A = common global [100 x [100 x i32]] zeroinitializer
@B = common global [100 x i32] zeroinitializer

; Loops should not be interchanged in this case as it is not legal due to dependency.
;
;  for(int j=0;j<99;j++)
;   for(int i=0;i<99;i++)
;       A[j][i+1] = A[j+1][i]+k;
;
define void @interchange_04(i32 %k){
; CHECK-LABEL: define void @interchange_04(
; CHECK-SAME: i32 [[K:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND1_PREHEADER:.*]]
; CHECK:       [[FOR_COND1_PREHEADER]]:
; CHECK-NEXT:    [[INDVARS_IV23:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[INDVARS_IV_NEXT24:%.*]], %[[FOR_INC12:.*]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT24]] = add nuw nsw i64 [[INDVARS_IV23]], 1
; CHECK-NEXT:    br label %[[FOR_BODY3:.*]]
; CHECK:       [[FOR_BODY3]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[FOR_COND1_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY3]] ]
; CHECK-NEXT:    [[ARRAYIDX5:%.*]] = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 [[INDVARS_IV_NEXT24]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX5]], align 4
; CHECK-NEXT:    [[ADD6:%.*]] = add nsw i32 [[TMP0]], [[K]]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[ARRAYIDX11:%.*]] = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 [[INDVARS_IV23]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    store i32 [[ADD6]], ptr [[ARRAYIDX11]], align 4
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 99
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_INC12]], label %[[FOR_BODY3]]
; CHECK:       [[FOR_INC12]]:
; CHECK-NEXT:    [[EXITCOND25:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT24]], 99
; CHECK-NEXT:    br i1 [[EXITCOND25]], label %[[FOR_END14:.*]], label %[[FOR_COND1_PREHEADER]]
; CHECK:       [[FOR_END14]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.cond1.preheader

for.cond1.preheader:
  %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for.inc12 ]
  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
  br label %for.body3

for.body3:
  %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
  %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 %indvars.iv.next24, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx5
  %add6 = add nsw i32 %0, %k
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %arrayidx11 = getelementptr inbounds [100 x [100 x i32]], ptr @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
  store i32 %add6, ptr %arrayidx11
  %exitcond = icmp eq i64 %indvars.iv.next, 99
  br i1 %exitcond, label %for.inc12, label %for.body3

for.inc12:
  %exitcond25 = icmp eq i64 %indvars.iv.next24, 99
  br i1 %exitcond25, label %for.end14, label %for.cond1.preheader

for.end14:
  ret void
}