partially-unroll-unconditional-latch.ll
3.09 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
; 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
}