1; RUN: llc -march=x86-64 < %s | FileCheck %s
2
3; LSR would like to use a single IV for both of these, however it's
4; not safe due to wraparound.
5
6; CHECK: addb  $-4, %
7; CHECK: decw  %
8
9@g_19 = common global i32 0                       ; <i32*> [#uses=2]
10
11declare i32 @func_8(i8 zeroext) nounwind
12
13declare i32 @func_3(i8 signext) nounwind
14
15define void @func_1() nounwind {
16entry:
17  br label %bb
18
19bb:                                               ; preds = %bb, %entry
20  %indvar = phi i16 [ 0, %entry ], [ %indvar.next, %bb ] ; <i16> [#uses=2]
21  %tmp = sub i16 0, %indvar                       ; <i16> [#uses=1]
22  %tmp27 = trunc i16 %tmp to i8                   ; <i8> [#uses=1]
23  %tmp1 = load i32, i32* @g_19, align 4                ; <i32> [#uses=2]
24  %tmp2 = add i32 %tmp1, 1                        ; <i32> [#uses=1]
25  store i32 %tmp2, i32* @g_19, align 4
26  %tmp3 = trunc i32 %tmp1 to i8                   ; <i8> [#uses=1]
27  %tmp4 = tail call i32 @func_8(i8 zeroext %tmp3) nounwind ; <i32> [#uses=0]
28  %tmp5 = shl i8 %tmp27, 2                        ; <i8> [#uses=1]
29  %tmp6 = add i8 %tmp5, -112                      ; <i8> [#uses=1]
30  %tmp7 = tail call i32 @func_3(i8 signext %tmp6) nounwind ; <i32> [#uses=0]
31  %indvar.next = add i16 %indvar, 1               ; <i16> [#uses=2]
32  %exitcond = icmp eq i16 %indvar.next, -28       ; <i1> [#uses=1]
33  br i1 %exitcond, label %return, label %bb
34
35return:                                           ; preds = %bb
36  ret void
37}
38