1; RUN: llc < %s -o - | FileCheck %s
2target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
3target triple = "x86_64-apple-darwin9"
4
5; The comparison happens before the relevant use, but it can still be rewritten
6; to compare with zero.
7
8; CHECK-LABEL: foo:
9; CHECK: align
10; CHECK: incl  %eax
11; CHECK-NEXT: decl  %ecx
12; CHECK-NEXT: jne
13
14define void @foo() nounwind {
15entry:
16	br label %loop
17
18loop:
19	%indvar = phi i32 [ 0, %entry ], [ %i.2.0.us1534, %loop ]		; <i32> [#uses=1]
20	%i.2.0.us1534 = add i32 %indvar, 1		; <i32> [#uses=3]
21	%tmp611.us1535 = icmp eq i32 %i.2.0.us1534, 4		; <i1> [#uses=2]
22	%tmp623.us1538 = select i1 %tmp611.us1535, i32 6, i32 0		; <i32> [#uses=0]
23	%tmp628.us1540 = shl i32 %i.2.0.us1534, 1		; <i32> [#uses=1]
24	%tmp645646647.us1547 = sext i32 %tmp628.us1540 to i64		; <i64> [#uses=0]
25	br i1 %tmp611.us1535, label %exit, label %loop
26
27exit:
28	ret void
29}
30