| ; RUN: opt -S -loop-fusion -loop-fusion-peel-max-count=3 < %s | FileCheck %s |
| |
| ; Tests that we do not fuse these two loops together. These loops do not have |
| ; the same tripcount, and the first loop is valid candiate for peeling; however |
| ; the loops are not adjacent, hence they are not valid to be fused (after |
| ; peeling). |
| ; The expected output of this test is the function below. |
| |
| ; CHECK-LABEL: void @function(i32* noalias %arg) |
| ; CHECK-NEXT: for.first.preheader: |
| ; CHECK-NEXT: br label %for.first |
| ; CHECK: for.first: |
| ; CHECK: br label %for.first.latch |
| ; CHECK: for.first.latch: |
| ; CHECK: br i1 %exitcond4, label %for.first, label %for.first.exit |
| ; CHECK: for.first.exit: |
| ; CHECK-NEXT: br label %for.next |
| ; CHECK: for.next: |
| ; CHECK-NEXT: br label %for.second.preheader |
| ; CHECK: for.second.preheader: |
| ; CHECK: br label %for.second |
| ; CHECK: for.second: |
| ; CHECK: br label %for.second.latch |
| ; CHECK: for.second.latch: |
| ; CHECK: br i1 %exitcond, label %for.second, label %for.end |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret void |
| |
| @B = common global [1024 x i32] zeroinitializer, align 16 |
| |
| define void @function(i32* noalias %arg) { |
| for.first.preheader: |
| br label %for.first |
| |
| for.first: ; preds = %for.first.preheader, %for.first.latch |
| %.014 = phi i32 [ 0, %for.first.preheader ], [ %tmp15, %for.first.latch ] |
| %indvars.iv23 = phi i64 [ 0, %for.first.preheader ], [ %indvars.iv.next3, %for.first.latch ] |
| %tmp = add nsw i32 %.014, -3 |
| %tmp8 = add nuw nsw i64 %indvars.iv23, 3 |
| %tmp9 = trunc i64 %tmp8 to i32 |
| %tmp10 = mul nsw i32 %tmp, %tmp9 |
| %tmp11 = trunc i64 %indvars.iv23 to i32 |
| %tmp12 = srem i32 %tmp10, %tmp11 |
| %tmp13 = getelementptr inbounds i32, i32* %arg, i64 %indvars.iv23 |
| store i32 %tmp12, i32* %tmp13, align 4 |
| br label %for.first.latch |
| |
| for.first.latch: ; preds = %for.first |
| %indvars.iv.next3 = add nuw nsw i64 %indvars.iv23, 1 |
| %tmp15 = add nuw nsw i32 %.014, 1 |
| %exitcond4 = icmp ne i64 %indvars.iv.next3, 100 |
| br i1 %exitcond4, label %for.first, label %for.first.exit |
| |
| for.first.exit: ; preds: %for.first.latch |
| br label %for.next |
| |
| for.next: ; preds = %for.first.exit |
| br label %for.second.preheader |
| |
| for.second.preheader: ; preds = %for.next |
| br label %for.second |
| |
| for.second: ; preds = %for.second.preheader, %for.second.latch |
| %.02 = phi i32 [ 0, %for.second.preheader ], [ %tmp28, %for.second.latch ] |
| %indvars.iv1 = phi i64 [ 3, %for.second.preheader ], [ %indvars.iv.next, %for.second.latch ] |
| %tmp20 = add nsw i32 %.02, -3 |
| %tmp21 = add nuw nsw i64 %indvars.iv1, 3 |
| %tmp22 = trunc i64 %tmp21 to i32 |
| %tmp23 = mul nsw i32 %tmp20, %tmp22 |
| %tmp24 = trunc i64 %indvars.iv1 to i32 |
| %tmp25 = srem i32 %tmp23, %tmp24 |
| %tmp26 = getelementptr inbounds [1024 x i32], [1024 x i32]* @B, i64 0, i64 %indvars.iv1 |
| store i32 %tmp25, i32* %tmp26, align 4 |
| br label %for.second.latch |
| |
| for.second.latch: ; preds = %for.second |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv1, 1 |
| %tmp28 = add nuw nsw i32 %.02, 1 |
| %exitcond = icmp ne i64 %indvars.iv.next, 100 |
| br i1 %exitcond, label %for.second, label %for.end |
| |
| for.end: ; preds = %for.second.latch |
| ret void |
| } |