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1; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 -O3 | FileCheck %s
2
3@.str = private constant [4 x i8] c"%d\0A\00", align 4 ; <[4 x i8]*> [#uses=1]
4
5define internal fastcc i32 @Callee(i32 %i) nounwind {
6entry:
7; CHECK-LABEL: Callee:
8; CHECK: push
9; CHECK: mov r4, sp
10; CHECK: sub.w [[R12:r[0-9]+]], r4, #1000
11; CHECK: mov sp, [[R12]]
12  %0 = icmp eq i32 %i, 0                          ; <i1> [#uses=1]
13  br i1 %0, label %bb2, label %bb
14
15bb:                                               ; preds = %entry
16  %1 = alloca [1000 x i8], align 4                ; <[1000 x i8]*> [#uses=1]
17  %.sub = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i32 0, i32 0 ; <i8*> [#uses=2]
18  %2 = call i32 (i8*, i32, i32, i8*, ...) @__sprintf_chk(i8* %.sub, i32 0, i32 1000, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %i) nounwind ; <i32> [#uses=0]
19  %3 = load i8, i8* %.sub, align 4                    ; <i8> [#uses=1]
20  %4 = sext i8 %3 to i32                          ; <i32> [#uses=1]
21  ret i32 %4
22
23bb2:                                              ; preds = %entry
24; Must restore sp from fp here. Make sure not to leave sp in a temporarily invalid
25; state though. rdar://8465407
26; CHECK-NOT: mov sp, r7
27; CHECK: sub.w r4, r7, #8
28; CHECK: mov sp, r4
29; CHECK: pop
30  ret i32 0
31}
32
33declare i32 @__sprintf_chk(i8*, i32, i32, i8*, ...) nounwind
34
35define i32 @main() nounwind {
36; CHECK-LABEL: main:
37bb.nph:
38  br label %bb
39
40bb:                                               ; preds = %bb, %bb.nph
41  %0 = phi i32 [ 0, %bb.nph ], [ %3, %bb ]        ; <i32> [#uses=2]
42  %j.01 = phi i32 [ 0, %bb.nph ], [ %2, %bb ]     ; <i32> [#uses=1]
43  %1 = tail call fastcc i32 @Callee(i32 %0) nounwind ; <i32> [#uses=1]
44  %2 = add nsw i32 %1, %j.01                      ; <i32> [#uses=2]
45  %3 = add nsw i32 %0, 1                          ; <i32> [#uses=2]
46  %exitcond = icmp eq i32 %3, 10000               ; <i1> [#uses=1]
47  br i1 %exitcond, label %bb2, label %bb
48
49bb2:                                              ; preds = %bb
50; No need to restore sp from fp here.
51; CHECK: printf
52; CHECK-NOT: mov sp, r7
53; CHECK-NOT: sub sp, #12
54; CHECK: pop
55  %4 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) nounwind ; <i32> [#uses=0]
56  ret i32 0
57}
58
59declare i32 @printf(i8* nocapture, ...) nounwind
60