| ; RUN: opt -loop-unroll -unroll-allow-partial -S %s -verify-loop-info -verify-dom-info -verify-loop-lcssa | FileCheck %s |
| |
| @table = internal unnamed_addr global [344 x i32] zeroinitializer, align 16 |
| |
| define i32 @test_partial_unroll_with_breakout_at_iter0() { |
| ; CHECK-LABEL: define i32 @test_partial_unroll_with_breakout_at_iter0() { |
| ; CHECK-LABEL: entry: |
| ; CHECK-NEXT: br label %for.header |
| |
| ; CHECK-LABEL: for.header: ; preds = %for.latch.3, %entry |
| ; CHECK-NEXT: %red = phi i32 [ 0, %entry ], [ %red.next.3, %for.latch.3 ] |
| ; CHECK-NEXT: %iv = phi i64 [ 0, %entry ], [ %iv.next.3, %for.latch.3 ] |
| ; CHECK-NEXT: %red.next = add nuw nsw i32 10, %red |
| ; CHECK-NEXT: %iv.next = add nuw nsw i64 %iv, 2 |
| ; CHECK-NEXT: %ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next |
| ; CHECK-NEXT: store i32 %red.next, i32* %ptr, align 4 |
| ; CHECK-NEXT: br label %for.latch |
| |
| ; CHECK-LABEL: for.latch: ; preds = %for.header |
| ; CHECK-NEXT: %red.next.1 = add nuw nsw i32 10, %red.next |
| ; CHECK-NEXT: %iv.next.1 = add nuw nsw i64 %iv.next, 2 |
| ; CHECK-NEXT: %ptr.1 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.1 |
| ; CHECK-NEXT: store i32 %red.next.1, i32* %ptr.1, align 4 |
| ; CHECK-NEXT: br label %for.latch.1 |
| |
| ; CHECK-LABEL: exit: ; preds = %for.latch.2 |
| ; CHECK-NEXT: ret i32 0 |
| |
| ; CHECK-LABEL: for.latch.1: ; preds = %for.latch |
| ; CHECK-NEXT: %red.next.2 = add nuw nsw i32 10, %red.next.1 |
| ; CHECK-NEXT: %iv.next.2 = add nuw nsw i64 %iv.next.1, 2 |
| ; CHECK-NEXT: %ptr.2 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.2 |
| ; CHECK-NEXT: store i32 %red.next.2, i32* %ptr.2, align 4 |
| ; CHECK-NEXT: br label %for.latch.2 |
| |
| ; CHECK-LABEL: for.latch.2: ; preds = %for.latch.1 |
| ; CHECK-NEXT: %red.next.3 = add nuw nsw i32 10, %red.next.2 |
| ; CHECK-NEXT: %iv.next.3 = add nuw nsw i64 %iv.next.2, 2 |
| ; CHECK-NEXT: %ptr.3 = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next.3 |
| ; CHECK-NEXT: store i32 %red.next.3, i32* %ptr.3, align 4 |
| ; CHECK-NEXT: %exitcond.1.i.3 = icmp eq i64 %iv.next.3, 344 |
| ; CHECK-NEXT: br i1 %exitcond.1.i.3, label %exit, label %for.latch.3 |
| |
| ; CHECK-LABEL: for.latch.3: ; preds = %for.latch.2 |
| ; CHECK-NEXT: br label %for.header |
| ; |
| entry: |
| br label %for.header |
| |
| for.header: ; preds = %for.body28.i.for.body28.i_crit_edge, %for.body.i |
| %red = phi i32 [ 0, %entry ], [ %red.next, %for.latch ] |
| %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.latch ] |
| %red.next = add i32 10, %red |
| %iv.next = add nuw nsw i64 %iv, 2 |
| %ptr = getelementptr inbounds [344 x i32], [344 x i32]* @table, i64 0, i64 %iv.next |
| store i32 %red.next, i32* %ptr, align 4 |
| %exitcond.1.i = icmp eq i64 %iv.next, 344 |
| br i1 %exitcond.1.i, label %exit, label %for.latch |
| |
| for.latch: ; preds = %for.header |
| br label %for.header |
| |
| exit: |
| ret i32 0 |
| } |