1; RUN: llc < %s -march=arm | FileCheck %s
2; RUN: llc < %s -march=arm -enable-tail-merge=0 | \
3; RUN:   FileCheck --check-prefix=NOMERGE %s
4
5; Check that tail merging is the default on ARM, and that -enable-tail-merge=0
6; works.
7; PR1628
8
9; CHECK: bl _baz
10; CHECK-NOT: bl _baz
11
12; CHECK: bl _quux
13; CHECK-NOT: bl _quux
14
15; NOMERGE: bl _baz
16; NOMERGE: bl _baz
17
18; NOMERGE: bl _quux
19; NOMERGE: bl _quux
20
21; ModuleID = 'tail.c'
22target 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"
23target triple = "i686-apple-darwin8"
24
25define i32 @f(i32 %i, i32 %q) {
26entry:
27	%i_addr = alloca i32		; <i32*> [#uses=2]
28	%q_addr = alloca i32		; <i32*> [#uses=2]
29	%retval = alloca i32, align 4		; <i32*> [#uses=1]
30	store i32 %i, i32* %i_addr
31	store i32 %q, i32* %q_addr
32	%tmp = load i32, i32* %i_addr		; <i32> [#uses=1]
33	%tmp1 = icmp ne i32 %tmp, 0		; <i1> [#uses=1]
34	%tmp12 = zext i1 %tmp1 to i8		; <i8> [#uses=1]
35	%toBool = icmp ne i8 %tmp12, 0		; <i1> [#uses=1]
36	br i1 %toBool, label %cond_true, label %cond_false
37
38cond_true:		; preds = %entry
39	%tmp3 = call i32 (...) @bar( )		; <i32> [#uses=0]
40	%tmp4 = call i32 (...) @baz( i32 5, i32 6 )		; <i32> [#uses=0]
41	%tmp7 = load i32, i32* %q_addr		; <i32> [#uses=1]
42	%tmp8 = icmp ne i32 %tmp7, 0		; <i1> [#uses=1]
43	%tmp89 = zext i1 %tmp8 to i8		; <i8> [#uses=1]
44	%toBool10 = icmp ne i8 %tmp89, 0		; <i1> [#uses=1]
45	br i1 %toBool10, label %cond_true11, label %cond_false15
46
47cond_false:		; preds = %entry
48	%tmp5 = call i32 (...) @foo( )		; <i32> [#uses=0]
49	%tmp6 = call i32 (...) @baz( i32 5, i32 6 )		; <i32> [#uses=0]
50	%tmp27 = load i32, i32* %q_addr		; <i32> [#uses=1]
51	%tmp28 = icmp ne i32 %tmp27, 0		; <i1> [#uses=1]
52	%tmp289 = zext i1 %tmp28 to i8		; <i8> [#uses=1]
53	%toBool210 = icmp ne i8 %tmp289, 0		; <i1> [#uses=1]
54	br i1 %toBool210, label %cond_true11, label %cond_false15
55
56cond_true11:		; preds = %cond_next
57	%tmp13 = call i32 (...) @foo( )		; <i32> [#uses=0]
58	%tmp14 = call i32 (...) @quux( i32 3, i32 4 )		; <i32> [#uses=0]
59	br label %cond_next18
60
61cond_false15:		; preds = %cond_next
62	%tmp16 = call i32 (...) @bar( )		; <i32> [#uses=0]
63	%tmp17 = call i32 (...) @quux( i32 3, i32 4 )		; <i32> [#uses=0]
64	br label %cond_next18
65
66cond_next18:		; preds = %cond_false15, %cond_true11
67	%tmp19 = call i32 (...) @bar( )		; <i32> [#uses=0]
68	br label %return
69
70return:		; preds = %cond_next18
71	%retval20 = load i32, i32* %retval		; <i32> [#uses=1]
72	ret i32 %retval20
73}
74
75declare i32 @bar(...)
76
77declare i32 @baz(...)
78
79declare i32 @foo(...)
80
81declare i32 @quux(...)
82