1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc < %s -mtriple=i686-- -tailcallopt | FileCheck %s
3
4; With -tailcallopt, CodeGen guarantees a tail call optimization
5; for all of these.
6
7declare fastcc i32 @tailcallee(i32 %a1, i32 %a2, i32 %a3, i32 %a4)
8
9define dso_local fastcc i32 @tailcaller(i32 %in1, i32 %in2) nounwind {
10; CHECK-LABEL: tailcaller:
11; CHECK:       # %bb.0: # %entry
12; CHECK-NEXT:    subl $16, %esp
13; CHECK-NEXT:    movl %ecx, {{[0-9]+}}(%esp)
14; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
15; CHECK-NEXT:    movl %edx, {{[0-9]+}}(%esp)
16; CHECK-NEXT:    movl %eax, {{[0-9]+}}(%esp)
17; CHECK-NEXT:    addl $8, %esp
18; CHECK-NEXT:    jmp tailcallee@PLT # TAILCALL
19entry:
20  %tmp11 = tail call fastcc i32 @tailcallee(i32 %in1, i32 %in2, i32 %in1, i32 %in2)
21  ret i32 %tmp11
22}
23
24declare fastcc i8* @alias_callee()
25
26define fastcc noalias i8* @noalias_caller() nounwind {
27; CHECK-LABEL: noalias_caller:
28; CHECK:       # %bb.0:
29; CHECK-NEXT:    jmp alias_callee@PLT # TAILCALL
30  %p = tail call fastcc i8* @alias_callee()
31  ret i8* %p
32}
33
34declare fastcc noalias i8* @noalias_callee()
35
36define dso_local fastcc i8* @alias_caller() nounwind {
37; CHECK-LABEL: alias_caller:
38; CHECK:       # %bb.0:
39; CHECK-NEXT:    jmp noalias_callee@PLT # TAILCALL
40  %p = tail call fastcc noalias i8* @noalias_callee()
41  ret i8* %p
42}
43
44declare fastcc i32 @i32_callee()
45
46define dso_local fastcc i32 @ret_undef() nounwind {
47; CHECK-LABEL: ret_undef:
48; CHECK:       # %bb.0:
49; CHECK-NEXT:    jmp i32_callee@PLT # TAILCALL
50  %p = tail call fastcc i32 @i32_callee()
51  ret i32 undef
52}
53
54declare fastcc void @does_not_return()
55
56define dso_local fastcc i32 @noret() nounwind {
57; CHECK-LABEL: noret:
58; CHECK:       # %bb.0:
59; CHECK-NEXT:    jmp does_not_return@PLT # TAILCALL
60  tail call fastcc void @does_not_return()
61  unreachable
62}
63
64define dso_local fastcc void @void_test(i32, i32, i32, i32) {
65; CHECK-LABEL: void_test:
66; CHECK:       # %bb.0: # %entry
67; CHECK-NEXT:    pushl %esi
68; CHECK-NEXT:    .cfi_def_cfa_offset 8
69; CHECK-NEXT:    subl $8, %esp
70; CHECK-NEXT:    .cfi_def_cfa_offset 16
71; CHECK-NEXT:    .cfi_offset %esi, -8
72; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
73; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %esi
74; CHECK-NEXT:    movl %esi, {{[0-9]+}}(%esp)
75; CHECK-NEXT:    movl %eax, {{[0-9]+}}(%esp)
76; CHECK-NEXT:    addl $8, %esp
77; CHECK-NEXT:    .cfi_def_cfa_offset 8
78; CHECK-NEXT:    popl %esi
79; CHECK-NEXT:    .cfi_def_cfa_offset 4
80; CHECK-NEXT:    jmp void_test # TAILCALL
81  entry:
82   tail call fastcc void @void_test( i32 %0, i32 %1, i32 %2, i32 %3)
83   ret void
84}
85
86define dso_local fastcc i1 @i1test(i32, i32, i32, i32) {
87; CHECK-LABEL: i1test:
88; CHECK:       # %bb.0: # %entry
89; CHECK-NEXT:    pushl %esi
90; CHECK-NEXT:    .cfi_def_cfa_offset 8
91; CHECK-NEXT:    subl $8, %esp
92; CHECK-NEXT:    .cfi_def_cfa_offset 16
93; CHECK-NEXT:    .cfi_offset %esi, -8
94; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
95; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %esi
96; CHECK-NEXT:    movl %esi, {{[0-9]+}}(%esp)
97; CHECK-NEXT:    movl %eax, {{[0-9]+}}(%esp)
98; CHECK-NEXT:    addl $8, %esp
99; CHECK-NEXT:    .cfi_def_cfa_offset 8
100; CHECK-NEXT:    popl %esi
101; CHECK-NEXT:    .cfi_def_cfa_offset 4
102; CHECK-NEXT:    jmp i1test # TAILCALL
103  entry:
104  %4 = tail call fastcc i1 @i1test( i32 %0, i32 %1, i32 %2, i32 %3)
105  ret i1 %4
106}
107