1 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=CHECK-AARCH64 --check-prefix=CHECK-LE %s
2 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -mattr=-fp-armv8 | FileCheck --check-prefix=CHECK-NOFP %s
3 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64_be-none-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=CHECK-BE %s
4 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64_be-none-linux-gnu -mattr=-fp-armv8 | FileCheck --check-prefix=CHECK-NOFP %s
5 ; RUN: llc -verify-machineinstrs < %s -mtriple=arm64-none-linux-gnu | FileCheck --check-prefix=CHECK --check-prefix=CHECK-ARM64 %s
7 %myStruct = type { i64 , i8, i32 }
12 @var128 = global i128 0
13 @varfloat = global float 0.0
14 @vardouble = global double 0.0
15 @varstruct = global %myStruct zeroinitializer
17 define void @take_i8s(i8 %val1, i8 %val2) {
18 ; CHECK-LABEL: take_i8s:
19 store i8 %val2, i8* @var8
20 ; Not using w1 may be technically allowed, but it would indicate a
22 ; CHECK: strb w1, [{{x[0-9]+}}, {{#?}}:lo12:var8]
26 define void @add_floats(float %val1, float %val2) {
27 ; CHECK-LABEL: add_floats:
28 %newval = fadd float %val1, %val2
29 ; CHECK: fadd [[ADDRES:s[0-9]+]], s0, s1
30 ; CHECK-NOFP-NOT: fadd
31 store float %newval, float* @varfloat
32 ; CHECK: str [[ADDRES]], [{{x[0-9]+}}, {{#?}}:lo12:varfloat]
36 ; byval pointers should be allocated to the stack and copied as if
38 define void @take_struct(%myStruct* byval %structval) {
39 ; CHECK-LABEL: take_struct:
40 %addr0 = getelementptr %myStruct* %structval, i64 0, i32 2
41 %addr1 = getelementptr %myStruct* %structval, i64 0, i32 0
43 %val0 = load volatile i32* %addr0
44 ; Some weird move means x0 is used for one access
45 ; CHECK: ldr [[REG32:w[0-9]+]], [{{x[0-9]+|sp}}, #12]
46 store volatile i32 %val0, i32* @var32
47 ; CHECK: str [[REG32]], [{{x[0-9]+}}, {{#?}}:lo12:var32]
49 %val1 = load volatile i64* %addr1
50 ; CHECK: ldr [[REG64:x[0-9]+]], [{{x[0-9]+|sp}}]
51 store volatile i64 %val1, i64* @var64
52 ; CHECK: str [[REG64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
57 ; %structval should be at sp + 16
58 define void @check_byval_align(i32* byval %ignore, %myStruct* byval align 16 %structval) {
59 ; CHECK-LABEL: check_byval_align:
61 %addr0 = getelementptr %myStruct* %structval, i64 0, i32 2
62 %addr1 = getelementptr %myStruct* %structval, i64 0, i32 0
64 %val0 = load volatile i32* %addr0
65 ; Some weird move means x0 is used for one access
66 ; CHECK-AARCH64: add x[[STRUCTVAL_ADDR:[0-9]+]], sp, #16
67 ; CHECK-AARCH64: ldr [[REG32:w[0-9]+]], [x[[STRUCTVAL_ADDR]], #12]
68 ; CHECK-ARM64: ldr [[REG32:w[0-9]+]], [sp, #28]
69 store i32 %val0, i32* @var32
70 ; CHECK: str [[REG32]], [{{x[0-9]+}}, {{#?}}:lo12:var32]
72 %val1 = load volatile i64* %addr1
73 ; CHECK: ldr [[REG64:x[0-9]+]], [sp, #16]
74 store i64 %val1, i64* @var64
75 ; CHECK: str [[REG64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
80 define i32 @return_int() {
81 ; CHECK-LABEL: return_int:
82 %val = load i32* @var32
84 ; CHECK: ldr w0, [{{x[0-9]+}}, {{#?}}:lo12:var32]
85 ; Make sure epilogue follows
89 define double @return_double() {
90 ; CHECK-LABEL: return_double:
92 ; CHECK: ldr d0, [{{x[0-9]+}}, {{#?}}:lo12:.LCPI
93 ; CHECK-NOFP-NOT: ldr d0,
96 ; This is the kind of IR clang will produce for returning a struct
97 ; small enough to go into registers. Not all that pretty, but it
99 define [2 x i64] @return_struct() {
100 ; CHECK-LABEL: return_struct:
101 %addr = bitcast %myStruct* @varstruct to [2 x i64]*
102 %val = load [2 x i64]* %addr
104 ; CHECK-DAG: ldr x0, [{{x[0-9]+}}, {{#?}}:lo12:varstruct]
105 ; Odd register regex below disallows x0 which we want to be live now.
106 ; CHECK-DAG: add {{x[1-9][0-9]*}}, {{x[1-9][0-9]*}}, {{#?}}:lo12:varstruct
107 ; CHECK: ldr x1, [{{x[1-9][0-9]*}}, #8]
108 ; Make sure epilogue immediately follows
112 ; Large structs are passed by reference (storage allocated by caller
113 ; to preserve value semantics) in x8. Strictly this only applies to
114 ; structs larger than 16 bytes, but C semantics can still be provided
115 ; if LLVM does it to %myStruct too. So this is the simplest check
116 define void @return_large_struct(%myStruct* sret %retval) {
117 ; CHECK-LABEL: return_large_struct:
118 %addr0 = getelementptr %myStruct* %retval, i64 0, i32 0
119 %addr1 = getelementptr %myStruct* %retval, i64 0, i32 1
120 %addr2 = getelementptr %myStruct* %retval, i64 0, i32 2
122 store i64 42, i64* %addr0
123 store i8 2, i8* %addr1
124 store i32 9, i32* %addr2
125 ; CHECK: str {{x[0-9]+}}, [x8]
126 ; CHECK: strb {{w[0-9]+}}, [x8, #8]
127 ; CHECK: str {{w[0-9]+}}, [x8, #12]
132 ; This struct is just too far along to go into registers: (only x7 is
133 ; available, but it needs two). Also make sure that %stacked doesn't
134 ; sneak into x7 behind.
135 define i32 @struct_on_stack(i8 %var0, i16 %var1, i32 %var2, i64 %var3, i128 %var45,
136 i32* %var6, %myStruct* byval %struct, i32* byval %stacked,
137 double %notstacked) {
138 ; CHECK-LABEL: struct_on_stack:
139 %addr = getelementptr %myStruct* %struct, i64 0, i32 0
140 %val64 = load volatile i64* %addr
141 store volatile i64 %val64, i64* @var64
142 ; Currently nothing on local stack, so struct should be at sp
143 ; CHECK: ldr [[VAL64:x[0-9]+]], [sp]
144 ; CHECK: str [[VAL64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
146 store volatile double %notstacked, double* @vardouble
148 ; CHECK: str d0, [{{x[0-9]+}}, {{#?}}:lo12:vardouble
149 ; CHECK-NOFP-NOT: str d0,
151 %retval = load volatile i32* %stacked
153 ; CHECK-LE: ldr w0, [sp, #16]
154 ; CHECK-BE: ldr w0, [sp, #20]
157 define void @stacked_fpu(float %var0, double %var1, float %var2, float %var3,
158 float %var4, float %var5, float %var6, float %var7,
160 ; CHECK-LABEL: stacked_fpu:
161 store float %var8, float* @varfloat
162 ; Beware as above: the offset would be different on big-endian
163 ; machines if the first ldr were changed to use s-registers.
164 ; CHECK: ldr {{[ds]}}[[VALFLOAT:[0-9]+]], [sp]
165 ; CHECK: str s[[VALFLOAT]], [{{x[0-9]+}}, {{#?}}:lo12:varfloat]
170 ; 128-bit integer types should be passed in xEVEN, xODD rather than
171 ; the reverse. In this case x2 and x3. Nothing should use x1.
172 define i64 @check_i128_regalign(i32 %val0, i128 %val1, i64 %val2) {
173 ; CHECK-LABEL: check_i128_regalign
174 store i128 %val1, i128* @var128
175 ; CHECK-DAG: str x2, [{{x[0-9]+}}, {{#?}}:lo12:var128]
176 ; CHECK-DAG: str x3, [{{x[0-9]+}}, #8]
182 define void @check_i128_stackalign(i32 %val0, i32 %val1, i32 %val2, i32 %val3,
183 i32 %val4, i32 %val5, i32 %val6, i32 %val7,
184 i32 %stack1, i128 %stack2) {
185 ; CHECK-LABEL: check_i128_stackalign
186 store i128 %stack2, i128* @var128
187 ; Nothing local on stack in current codegen, so first stack is 16 away
188 ; CHECK-LE: add x[[REG:[0-9]+]], sp, #16
189 ; CHECK-LE: ldr {{x[0-9]+}}, [x[[REG]], #8]
190 ; CHECK-BE: ldr {{x[0-9]+}}, [sp, #24]
192 ; Important point is that we address sp+24 for second dword
193 ; CHECK-AARCH64: ldr {{x[0-9]+}}, [sp, #16]
195 ; CHECK-ARM64: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
199 declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
201 define i32 @test_extern() {
202 ; CHECK-LABEL: test_extern:
203 call void @llvm.memcpy.p0i8.p0i8.i32(i8* undef, i8* undef, i32 undef, i32 4, i1 0)