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. 3 4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 target triple = "x86_64-unknown-linux-gnu" 6 7 @A = common global [100 x [100 x i32]] zeroinitializer 8 @B = common global [100 x [100 x [100 x i32]]] zeroinitializer 9 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; 16 17 define void @interchange_01(i32 %k, i32 %N) { 18 entry: 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 22 23 for.cond1.preheader.lr.ph: 24 %cmp324 = icmp sgt i32 %sub, 1 25 %0 = add i32 %N, -2 26 %1 = sext i32 %sub to i64 27 br label %for.cond1.preheader 28 29 for.cond.loopexit: 30 %cmp = icmp slt i64 %indvars.iv.next29, %1 31 br i1 %cmp, label %for.cond1.preheader, label %for.end17 32 33 for.cond1.preheader: 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 37 38 for.body4: 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 48 49 for.end17: 50 ret void 51 } 52 ;; Inner loop not split so it is not interchanged. 53 ; CHECK-LABEL: @interchange_01 54 ; CHECK: for.body4: 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 58 59
