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
|
; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -relocation-model=pic | FileCheck %s
; rdar://7387640
; This now reduces to a single induction variable.
@G = external global i32 ; <i32*> [#uses=2]
@array = external global i32* ; <i32**> [#uses=1]
define void @t() nounwind optsize {
; CHECK-LABEL: t:
; CHECK: mov{{.*}}, #1000
entry:
%.pre = load i32* @G, align 4 ; <i32> [#uses=1]
br label %bb
bb: ; preds = %bb, %entry
; CHECK: LBB0_1:
; CHECK: subs [[R2:r[0-9]+]], #1
; CHECK: cmp.w [[R2]], #-1
; CHECK: bne LBB0_1
%0 = phi i32 [ %.pre, %entry ], [ %3, %bb ] ; <i32> [#uses=1]
%indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2]
%tmp5 = sub i32 1000, %indvar ; <i32> [#uses=1]
%1 = load i32** @array, align 4 ; <i32*> [#uses=1]
%scevgep = getelementptr i32* %1, i32 %tmp5 ; <i32*> [#uses=1]
%2 = load i32* %scevgep, align 4 ; <i32> [#uses=1]
%3 = add nsw i32 %2, %0 ; <i32> [#uses=2]
store i32 %3, i32* @G, align 4
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 1001 ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %bb
return: ; preds = %bb
ret void
}
|
