1 ; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
2 ;; These are test that fail to interchange due to current limitation. This will go off once we extend the loop interchange pass.
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
7 @A = common global [100 x [100 x i32]] zeroinitializer
8 @B = common global [100 x [100 x [100 x i32]]] zeroinitializer
10 ;;--------------------------------------Test case 01------------------------------------
11 ;; [FIXME] This loop though valid is currently not interchanged due to the limitation that we cannot split the inner loop latch due to multiple use of inner induction
12 ;; variable.(used to increment the loop counter and to access A[j+1][i+1]
13 ;; for(int i=0;i<N-1;i++)
14 ;; for(int j=1;j<N-1;j++)
15 ;; A[j+1][i+1] = A[j+1][i+1] + k;
17 define void @interchange_01(i32 %k, i32 %N) {
19 %sub = add nsw i32 %N, -1
20 %cmp26 = icmp sgt i32 %N, 1
21 br i1 %cmp26, label %for.cond1.preheader.lr.ph, label %for.end17
23 for.cond1.preheader.lr.ph:
24 %cmp324 = icmp sgt i32 %sub, 1
26 %1 = sext i32 %sub to i64
27 br label %for.cond1.preheader
30 %cmp = icmp slt i64 %indvars.iv.next29, %1
31 br i1 %cmp, label %for.cond1.preheader, label %for.end17
34 %indvars.iv28 = phi i64 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next29, %for.cond.loopexit ]
35 %indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1
36 br i1 %cmp324, label %for.body4, label %for.cond.loopexit
39 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4 ], [ 1, %for.cond1.preheader ]
40 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
41 %arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next, i64 %indvars.iv.next29
42 %2 = load i32, i32* %arrayidx7
43 %add8 = add nsw i32 %2, %k
44 store i32 %add8, i32* %arrayidx7
45 %lftr.wideiv = trunc i64 %indvars.iv to i32
46 %exitcond = icmp eq i32 %lftr.wideiv, %0
47 br i1 %exitcond, label %for.cond.loopexit, label %for.body4
52 ;; Inner loop not split so it is not interchanged.
53 ; CHECK-LABEL: @interchange_01
55 ; CHECK-NEXT: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4 ], [ 1, %for.body4.preheader ]
56 ; CHECK-NEXT: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
57 ; CHECK-NEXT: %arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next, i64 %indvars.iv.next29