1 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s --check-prefixes=SDAG,COMMON
2 ; RUN: llc -global-isel -global-isel-abort=1 -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s --check-prefixes=GISEL,COMMON
4 declare swifttailcc void @callee_stack0()
5 declare swifttailcc void @callee_stack8([8 x i64], i64)
6 declare swifttailcc void @callee_stack16([8 x i64], i64, i64)
7 declare extern_weak swifttailcc void @callee_weak()
9 define swifttailcc void @caller_to0_from0() nounwind {
10 ; COMMON-LABEL: caller_to0_from0:
11 ; COMMON-NEXT: // %bb.
13 musttail call swifttailcc void @callee_stack0()
16 ; COMMON-NEXT: b callee_stack0
19 define swifttailcc void @caller_to0_from8([8 x i64], i64) #0 {
20 ; COMMON-LABEL: caller_to0_from8:
22 musttail call swifttailcc void @callee_stack0()
25 ; COMMON: add sp, sp, #16
26 ; COMMON-NEXT: .cfi_def_cfa_offset -16
27 ; COMMON-NEXT: b callee_stack0
30 define swifttailcc void @caller_to8_from0() #0 {
31 ; COMMON-LABEL: caller_to8_from0:
33 ; Key point is that the "42" should go #16 below incoming stack
34 ; pointer (we didn't have arg space to reuse).
35 musttail call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
38 ; COMMON: str {{x[0-9]+}}, [sp, #-16]!
39 ; COMMON-NEXT: .cfi_def_cfa_offset 16
40 ; COMMON-NEXT: b callee_stack8
43 define swifttailcc void @caller_to8_from8([8 x i64], i64 %a) #0 {
44 ; COMMON-LABEL: caller_to8_from8:
47 ; Key point is that the "%a" should go where at SP on entry.
48 musttail call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
51 ; COMMON: str {{x[0-9]+}}, [sp]
52 ; COMMON-NEXT: b callee_stack8
55 define swifttailcc void @caller_to16_from8([8 x i64], i64 %a) #0 {
56 ; COMMON-LABEL: caller_to16_from8:
59 ; Important point is that the call reuses the "dead" argument space
60 ; above %a on the stack. If it tries to go below incoming-SP then the
61 ; callee will not deallocate the space, even in swifttailcc.
62 musttail call swifttailcc void @callee_stack16([8 x i64] undef, i64 42, i64 2)
64 ; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp]
65 ; COMMON-NEXT: b callee_stack16
70 define swifttailcc void @caller_to8_from24([8 x i64], i64 %a, i64 %b, i64 %c) #0 {
71 ; COMMON-LABEL: caller_to8_from24:
74 ; Key point is that the "%a" should go where at #16 above SP on entry.
75 musttail call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
78 ; COMMON: str {{x[0-9]+}}, [sp, #16]!
79 ; COMMON-NEXT: .cfi_def_cfa_offset -16
80 ; COMMON-NEXT: b callee_stack8
84 define swifttailcc void @caller_to16_from16([8 x i64], i64 %a, i64 %b) #0 {
85 ; COMMON-LABEL: caller_to16_from16:
88 ; Here we want to make sure that both loads happen before the stores:
89 ; otherwise either %a or %b will be wrongly clobbered.
90 musttail call swifttailcc void @callee_stack16([8 x i64] undef, i64 %b, i64 %a)
93 ; COMMON: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp]
94 ; COMMON: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp]
95 ; COMMON-NEXT: b callee_stack16
98 define swifttailcc void @disable_tail_calls() nounwind "disable-tail-calls"="true" {
99 ; COMMON-LABEL: disable_tail_calls:
100 ; COMMON-NEXT: // %bb.
102 tail call swifttailcc void @callee_stack0()
105 ; COMMON: bl callee_stack0
109 ; Weakly-referenced extern functions cannot be tail-called, as AAELF does
110 ; not define the behaviour of branch instructions to undefined weak symbols.
111 define swifttailcc void @caller_weak() #0 {
112 ; COMMON-LABEL: caller_weak:
113 ; COMMON: bl callee_weak
114 tail call void @callee_weak()
118 declare { [2 x float] } @get_vec2()
120 define { [3 x float] } @test_add_elem() #0 {
121 ; SDAG-LABEL: test_add_elem:
123 ; SDAG: fmov s2, #1.0
125 ; GISEL-LABEL: test_add_elem:
126 ; GISEL: str x30, [sp, #-16]!
128 ; GISEL: fmov s2, #1.0
129 ; GISEL: ldr x30, [sp], #16
132 %call = tail call { [2 x float] } @get_vec2()
133 %arr = extractvalue { [2 x float] } %call, 0
134 %arr.0 = extractvalue [2 x float] %arr, 0
135 %arr.1 = extractvalue [2 x float] %arr, 1
137 %res.0 = insertvalue { [3 x float] } undef, float %arr.0, 0, 0
138 %res.01 = insertvalue { [3 x float] } %res.0, float %arr.1, 0, 1
139 %res.012 = insertvalue { [3 x float] } %res.01, float 1.000000e+00, 0, 2
140 ret { [3 x float] } %res.012
143 declare double @get_double()
144 define { double, [2 x double] } @test_mismatched_insert() #0 {
145 ; COMMON-LABEL: test_mismatched_insert:
146 ; COMMON: bl get_double
147 ; COMMON: bl get_double
148 ; COMMON: bl get_double
151 %val0 = call double @get_double()
152 %val1 = call double @get_double()
153 %val2 = tail call double @get_double()
155 %res.0 = insertvalue { double, [2 x double] } undef, double %val0, 0
156 %res.01 = insertvalue { double, [2 x double] } %res.0, double %val1, 1, 0
157 %res.012 = insertvalue { double, [2 x double] } %res.01, double %val2, 1, 1
159 ret { double, [2 x double] } %res.012
162 define void @fromC_totail() #0 {
163 ; COMMON-LABEL: fromC_totail:
164 ; COMMON: sub sp, sp, #48
166 ; COMMON-NOT: sub sp,
167 ; COMMON: mov w[[TMP:[0-9]+]], #42
168 ; COMMON: str x[[TMP]], [sp]
169 ; COMMON: bl callee_stack8
170 ; We must reset the stack to where it was before the call by undoing its extra stack pop.
171 ; COMMON: str x[[TMP]], [sp, #-16]!
172 ; COMMON: bl callee_stack8
173 ; COMMON: sub sp, sp, #16
175 call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
176 call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
180 define void @fromC_totail_noreservedframe(i32 %len) #0 {
181 ; COMMON-LABEL: fromC_totail_noreservedframe:
182 ; COMMON: stp x29, x30, [sp, #-48]!
184 ; COMMON: mov w[[TMP:[0-9]+]], #42
185 ; Note stack is subtracted here to allocate space for arg
186 ; COMMON: str x[[TMP]], [sp, #-16]!
187 ; COMMON: bl callee_stack8
189 ; COMMON: str x[[TMP]], [sp, #-16]!
190 ; COMMON: bl callee_stack8
191 ; But not restored here because callee_stack8 did that for us.
192 ; COMMON-NOT: sub sp,
194 ; Variable sized allocation prevents reserving frame at start of function so each call must allocate any stack space it needs.
195 %var = alloca i32, i32 %len
197 call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
198 call swifttailcc void @callee_stack8([8 x i64] undef, i64 42)
202 declare void @Ccallee_stack8([8 x i64], i64)
204 define swifttailcc void @fromtail_toC() #0 {
205 ; COMMON-LABEL: fromtail_toC:
206 ; COMMON: sub sp, sp, #32
208 ; COMMON-NOT: sub sp,
209 ; COMMON: mov w[[TMP:[0-9]+]], #42
210 ; COMMON: str x[[TMP]], [sp]
211 ; COMMON: bl Ccallee_stack8
212 ; C callees will return with the stack exactly where we left it, so we mustn't try to fix anything.
213 ; COMMON-NOT: add sp,
214 ; COMMON-NOT: sub sp,
215 ; COMMON: str x[[TMP]], [sp]{{$}}
216 ; COMMON: bl Ccallee_stack8
217 ; COMMON-NOT: sub sp,
220 call void @Ccallee_stack8([8 x i64] undef, i64 42)
221 call void @Ccallee_stack8([8 x i64] undef, i64 42)
225 declare swifttailcc ptr @SwiftSelf(ptr swiftasync %context, ptr swiftself %closure)
226 define swiftcc ptr @CallSwiftSelf(ptr swiftself %closure, ptr %context) #0 {
227 ; CHECK-LABEL: CallSwiftSelf:
229 ;call void asm "","~{r13}"() ; We get a push r13 but why not with the call
231 %res = call swifttailcc ptr @SwiftSelf(ptr swiftasync %context, ptr swiftself %closure)
235 attributes #0 = { uwtable }