count-to-zero.ll
1.7 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
; RUN: opt < %s -loop-reduce -S | FileCheck %s
; rdar://7382068
; Provide legal integer types.
target datalayout = "n8:16:32:64"
define void @t(i32 %c) nounwind optsize {
entry:
br label %bb6
bb1: ; preds = %bb6
%tmp = icmp eq i32 %c_addr.1, 20 ; <i1> [#uses=1]
br i1 %tmp, label %bb2, label %bb3
bb2: ; preds = %bb1
%tmp1 = tail call i32 @f20(i32 %c_addr.1) nounwind ; <i32> [#uses=1]
br label %bb7
bb3: ; preds = %bb1
%tmp2 = icmp slt i32 %c_addr.1, 10 ; <i1> [#uses=1]
%tmp3 = add nsw i32 %c_addr.1, 1 ; <i32> [#uses=1]
%tmp4 = add i32 %c_addr.1, -1 ; <i32> [#uses=1]
%c_addr.1.be = select i1 %tmp2, i32 %tmp3, i32 %tmp4 ; <i32> [#uses=1]
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
; CHECK: add nsw i32 %lsr.iv, -1
br label %bb6
bb6: ; preds = %bb3, %entry
%indvar = phi i32 [ %indvar.next, %bb3 ], [ 0, %entry ] ; <i32> [#uses=2]
%c_addr.1 = phi i32 [ %c_addr.1.be, %bb3 ], [ %c, %entry ] ; <i32> [#uses=7]
%tmp5 = icmp eq i32 %indvar, 9999 ; <i1> [#uses=1]
; CHECK: icmp eq i32 %lsr.iv, 0
%tmp6 = icmp eq i32 %c_addr.1, 100 ; <i1> [#uses=1]
%or.cond = or i1 %tmp5, %tmp6 ; <i1> [#uses=1]
br i1 %or.cond, label %bb7, label %bb1
bb7: ; preds = %bb6, %bb2
%c_addr.0 = phi i32 [ %tmp1, %bb2 ], [ %c_addr.1, %bb6 ] ; <i32> [#uses=1]
tail call void @bar(i32 %c_addr.0) nounwind
ret void
}
declare i32 @f20(i32)
declare void @bar(i32)