| ; 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 profitable. |
| ;; for(int i=0;i<100;i++) |
| ;; for(int j=0;j<100;j++) |
| ;; A[i][j] = A[i][j]+k; |
| |
| define void @interchange_03(i32 %k) { |
| entry: |
| br label %for.cond1.preheader |
| |
| for.cond1.preheader: |
| %indvars.iv21 = phi i64 [ 0, %entry ], [ %indvars.iv.next22, %for.inc10 ] |
| 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.iv21, i64 %indvars.iv |
| %0 = load i32, i32* %arrayidx5 |
| %add = add nsw i32 %0, %k |
| store i32 %add, i32* %arrayidx5 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 100 |
| br i1 %exitcond, label %for.inc10, label %for.body3 |
| |
| for.inc10: |
| %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1 |
| %exitcond23 = icmp eq i64 %indvars.iv.next22, 100 |
| br i1 %exitcond23, label %for.end12, label %for.cond1.preheader |
| |
| for.end12: |
| ret void |
| } |
| |
| ; CHECK-LABEL: @interchange_03 |
| ; CHECK: entry: |
| ; CHECK: br label %for.cond1.preheader.preheader |
| ; CHECK: for.cond1.preheader.preheader: ; preds = %entry |
| ; CHECK: br label %for.cond1.preheader |
| ; CHECK: for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc10 |
| ; CHECK: %indvars.iv21 = phi i64 [ %indvars.iv.next22, %for.inc10 ], [ 0, %for.cond1.preheader.preheader ] |
| ; CHECK: br label %for.body3.preheader |
| ; CHECK: for.body3.preheader: ; preds = %for.cond1.preheader |
| ; CHECK: br label %for.body3 |
| ; CHECK: for.body3: ; preds = %for.body3.preheader, %for.body3 |
| ; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body3 ], [ 0, %for.body3.preheader ] |
| ; CHECK: %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv21, i64 %indvars.iv |
| ; CHECK: %0 = load i32, i32* %arrayidx5 |
| ; CHECK: %add = add nsw i32 %0, %k |
| ; CHECK: store i32 %add, i32* %arrayidx5 |
| ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| ; CHECK: %exitcond = icmp eq i64 %indvars.iv.next, 100 |
| ; CHECK: br i1 %exitcond, label %for.inc10, label %for.body3 |
| ; CHECK: for.inc10: ; preds = %for.body3 |
| ; CHECK: %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1 |
| ; CHECK: %exitcond23 = icmp eq i64 %indvars.iv.next22, 100 |
| ; CHECK: br i1 %exitcond23, label %for.end12, label %for.cond1.preheader |
| ; CHECK: for.end12: ; preds = %for.inc10 |
| ; CHECK: ret void |