1 files changed, 64 insertions, 0 deletions
diff --git a/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll b/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll
new file mode 100644
index 0000000000000..cf4f83baea82b
--- /dev/null
+++ b/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll
@@ -0,0 +1,64 @@
+; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
+;; We test the complete .ll for adjustment in outer loop header/latch and inner loop header/latch.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@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){
+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]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next24, i64 %indvars.iv
+  %0 = load i32, i32* %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]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
+  store i32 %add6, i32* %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
+}
+
+; CHECK-LABEL: @interchange_04
+; CHECK: entry:
+; CHECK:   br label %for.cond1.preheader
+; CHECK: for.cond1.preheader:                              ; preds = %for.inc12, %entry
+; CHECK:   %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for.inc12 ]
+; CHECK:   %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
+; CHECK:   br label %for.body3
+; CHECK: for.body3:                                        ; preds = %for.body3, %for.cond1.preheader
+; CHECK:   %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
+; CHECK:   %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next24, i64 %indvars.iv
+; CHECK:   %0 = load i32, i32* %arrayidx5
+; CHECK:   %add6 = add nsw i32 %0, %k
+; CHECK:   %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+; CHECK:   %arrayidx11 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
+; CHECK:   store i32 %add6, i32* %arrayidx11
+; CHECK:   %exitcond = icmp eq i64 %indvars.iv.next, 99
+; CHECK:   br i1 %exitcond, label %for.inc12, label %for.body3
+; CHECK: for.inc12:                                        ; preds = %for.body3
+; CHECK:   %exitcond25 = icmp eq i64 %indvars.iv.next24, 99
+; CHECK:   br i1 %exitcond25, label %for.end14, label %for.cond1.preheader
+; CHECK: for.end14:                                        ; preds = %for.inc12
+; CHECK:   ret void