1; RUN: llc < %s -march=x86 -mtriple=i686-apple-darwin9.4.0 -disable-branch-fold | FileCheck %s
2; PR2659
3
4target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
5target triple = "i686-apple-darwin9.4.0"
6
7define i32 @binomial(i32 %n, i32 %k) nounwind  {
8entry:
9  %cmp = icmp ugt i32 %k, %n            ; <i1> [#uses=1]
10  br i1 %cmp, label %ifthen, label %forcond.preheader
11
12forcond.preheader:              ; preds = %entry
13  %cmp44 = icmp eq i32 %k, 0            ; <i1> [#uses=1]
14  br i1 %cmp44, label %afterfor, label %forbody
15
16; CHECK: %forcond.preheader
17; CHECK: movl $1
18; CHECK-NOT: xorl
19; CHECK-NOT: movl
20; CHECK-NOT: LBB
21; CHECK: je
22
23; There should be no moves required in the for loop body.
24; CHECK: %forbody{{$}}
25; CHECK-NOT: mov
26; CHECK: jbe
27
28ifthen:         ; preds = %entry
29  ret i32 0
30
31forbody:                ; preds = %forbody, %forcond.preheader
32  %indvar = phi i32 [ 0, %forcond.preheader ], [ %divisor.02, %forbody ]                ; <i32> [#uses=3]
33  %accumulator.01 = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ]               ; <i32> [#uses=1]
34  %divisor.02 = add i32 %indvar, 1              ; <i32> [#uses=2]
35  %n.addr.03 = sub i32 %n, %indvar              ; <i32> [#uses=1]
36  %mul = mul i32 %n.addr.03, %accumulator.01            ; <i32> [#uses=1]
37  %div = udiv i32 %mul, %divisor.02             ; <i32> [#uses=2]
38  %inc = add i32 %indvar, 2             ; <i32> [#uses=1]
39  %cmp4 = icmp ugt i32 %inc, %k         ; <i1> [#uses=1]
40  br i1 %cmp4, label %afterfor, label %forbody
41
42afterfor:               ; preds = %forbody, %forcond.preheader
43  %accumulator.0.lcssa = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ]          ; <i32> [#uses=1]
44  ret i32 %accumulator.0.lcssa
45}
46