| Florian Hahn | 4c11b52 | 2019-06-26 09:16:57 +0000 | [diff] [blame^] | 1 | ; RUN: opt -loop-unroll -unroll-allow-partial -S %s -verify-loop-info -verify-dom-info -verify-loop-lcssa | FileCheck %s |
| 2 | |
| 3 | @table = internal unnamed_addr global [344 x i32] zeroinitializer, align 16 |
| 4 | |
| 5 | define i32 @test_partial_unroll_with_breakout_at_iter0() { |
| 6 | ; CHECK-LABEL: define i32 @test_partial_unroll_with_breakout_at_iter0() { |
| 7 | ; CHECK-LABEL: entry: |
| 8 | ; CHECK-NEXT: br label %for.header |
| 9 | |
| 10 | ; CHECK-LABEL: for.header: ; preds = %for.latch.3, %entry |
| 11 | ; CHECK-NEXT: %red = phi i32 [ 0, %entry ], [ %red.next.3, %for.latch.3 ] |
| 12 | ; CHECK-NEXT: %iv = phi i64 [ 0, %entry ], [ %iv.next.3, %for.latch.3 ] |
| 13 | ; CHECK-NEXT: %red.next = add nuw nsw i32 10, %red |
| 14 | ; CHECK-NEXT: %iv.next = add nuw nsw i64 %iv, 2 |
| 15 | ; CHECK-NEXT: %ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next |
| 16 | ; CHECK-NEXT: store i32 %red.next, i32* %ptr, align 4 |
| 17 | ; CHECK-NEXT: br label %for.latch |
| 18 | |
| 19 | ; CHECK-LABEL: for.latch: ; preds = %for.header |
| 20 | ; CHECK-NEXT: %red.next.1 = add nuw nsw i32 10, %red.next |
| 21 | ; CHECK-NEXT: %iv.next.1 = add nuw nsw i64 %iv.next, 2 |
| 22 | ; CHECK-NEXT: %ptr.1 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.1 |
| 23 | ; CHECK-NEXT: store i32 %red.next.1, i32* %ptr.1, align 4 |
| 24 | ; CHECK-NEXT: br label %for.latch.1 |
| 25 | |
| 26 | ; CHECK-LABEL: exit: ; preds = %for.latch.2 |
| 27 | ; CHECK-NEXT: ret i32 0 |
| 28 | |
| 29 | ; CHECK-LABEL: for.latch.1: ; preds = %for.latch |
| 30 | ; CHECK-NEXT: %red.next.2 = add nuw nsw i32 10, %red.next.1 |
| 31 | ; CHECK-NEXT: %iv.next.2 = add nuw nsw i64 %iv.next.1, 2 |
| 32 | ; CHECK-NEXT: %ptr.2 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.2 |
| 33 | ; CHECK-NEXT: store i32 %red.next.2, i32* %ptr.2, align 4 |
| 34 | ; CHECK-NEXT: br label %for.latch.2 |
| 35 | |
| 36 | ; CHECK-LABEL: for.latch.2: ; preds = %for.latch.1 |
| 37 | ; CHECK-NEXT: %red.next.3 = add nuw nsw i32 10, %red.next.2 |
| 38 | ; CHECK-NEXT: %iv.next.3 = add nuw nsw i64 %iv.next.2, 2 |
| 39 | ; CHECK-NEXT: %ptr.3 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.3 |
| 40 | ; CHECK-NEXT: store i32 %red.next.3, i32* %ptr.3, align 4 |
| 41 | ; CHECK-NEXT: %exitcond.1.i.3 = icmp eq i64 %iv.next.3, 344 |
| 42 | ; CHECK-NEXT: br i1 %exitcond.1.i.3, label %exit, label %for.latch.3 |
| 43 | |
| 44 | ; CHECK-LABEL: for.latch.3: ; preds = %for.latch.2 |
| 45 | ; CHECK-NEXT: br label %for.header |
| 46 | ; |
| 47 | entry: |
| 48 | br label %for.header |
| 49 | |
| 50 | for.header: ; preds = %for.body28.i.for.body28.i_crit_edge, %for.body.i |
| 51 | %red = phi i32 [ 0, %entry ], [ %red.next, %for.latch ] |
| 52 | %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.latch ] |
| 53 | %red.next = add i32 10, %red |
| 54 | %iv.next = add nuw nsw i64 %iv, 2 |
| 55 | %ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next |
| 56 | store i32 %red.next, i32* %ptr, align 4 |
| 57 | %exitcond.1.i = icmp eq i64 %iv.next, 344 |
| 58 | br i1 %exitcond.1.i, label %exit, label %for.latch |
| 59 | |
| 60 | for.latch: ; preds = %for.header |
| 61 | br label %for.header |
| 62 | |
| 63 | exit: |
| 64 | ret i32 0 |
| 65 | } |