1 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -disable-post-ra | FileCheck %s
2 ; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -mattr=-fp-armv8 -disable-post-ra | FileCheck --check-prefix=CHECK-NOFP %s
4 %myStruct = type { i64 , i8, i32 }
9 @var128 = global i128 0
10 @varfloat = global float 0.0
11 @vardouble = global double 0.0
12 @varstruct = global %myStruct zeroinitializer
14 define void @take_i8s(i8 %val1, i8 %val2) {
15 ; CHECK-LABEL: take_i8s:
16 store i8 %val2, i8* @var8
17 ; Not using w1 may be technically allowed, but it would indicate a
19 ; CHECK: strb w1, [{{x[0-9]+}}, {{#?}}:lo12:var8]
23 define void @add_floats(float %val1, float %val2) {
24 ; CHECK-LABEL: add_floats:
25 %newval = fadd float %val1, %val2
26 ; CHECK: fadd [[ADDRES:s[0-9]+]], s0, s1
27 ; CHECK-NOFP-NOT: fadd
28 store float %newval, float* @varfloat
29 ; CHECK: str [[ADDRES]], [{{x[0-9]+}}, {{#?}}:lo12:varfloat]
33 ; byval pointers should be allocated to the stack and copied as if
35 define void @take_struct(%myStruct* byval %structval) {
36 ; CHECK-LABEL: take_struct:
37 %addr0 = getelementptr %myStruct, %myStruct* %structval, i64 0, i32 2
38 %addr1 = getelementptr %myStruct, %myStruct* %structval, i64 0, i32 0
40 %val0 = load volatile i32, i32* %addr0
41 ; Some weird move means x0 is used for one access
42 ; CHECK: ldr [[REG32:w[0-9]+]], [{{x[0-9]+|sp}}, #12]
43 store volatile i32 %val0, i32* @var32
44 ; CHECK: str [[REG32]], [{{x[0-9]+}}, {{#?}}:lo12:var32]
46 %val1 = load volatile i64, i64* %addr1
47 ; CHECK: ldr [[REG64:x[0-9]+]], [{{x[0-9]+|sp}}]
48 store volatile i64 %val1, i64* @var64
49 ; CHECK: str [[REG64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
54 ; %structval should be at sp + 16
55 define void @check_byval_align(i32* byval %ignore, %myStruct* byval align 16 %structval) {
56 ; CHECK-LABEL: check_byval_align:
58 %addr0 = getelementptr %myStruct, %myStruct* %structval, i64 0, i32 2
59 %addr1 = getelementptr %myStruct, %myStruct* %structval, i64 0, i32 0
61 %val0 = load volatile i32, i32* %addr0
62 ; Some weird move means x0 is used for one access
63 ; CHECK: ldr [[REG32:w[0-9]+]], [sp, #28]
64 store i32 %val0, i32* @var32
65 ; CHECK: str [[REG32]], [{{x[0-9]+}}, {{#?}}:lo12:var32]
67 %val1 = load volatile i64, i64* %addr1
68 ; CHECK: ldr [[REG64:x[0-9]+]], [sp, #16]
69 store i64 %val1, i64* @var64
70 ; CHECK: str [[REG64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
75 define i32 @return_int() {
76 ; CHECK-LABEL: return_int:
77 %val = load i32, i32* @var32
79 ; CHECK: ldr w0, [{{x[0-9]+}}, {{#?}}:lo12:var32]
80 ; Make sure epilogue follows
84 define double @return_double() {
85 ; CHECK-LABEL: return_double:
87 ; CHECK: ldr d0, [{{x[0-9]+}}, {{#?}}:lo12:.LCPI
88 ; CHECK-NOFP-NOT: ldr d0,
91 ; This is the kind of IR clang will produce for returning a struct
92 ; small enough to go into registers. Not all that pretty, but it
94 define [2 x i64] @return_struct() {
95 ; CHECK-LABEL: return_struct:
96 %addr = bitcast %myStruct* @varstruct to [2 x i64]*
97 %val = load [2 x i64], [2 x i64]* %addr
99 ; CHECK: add x[[VARSTRUCT:[0-9]+]], {{x[0-9]+}}, :lo12:varstruct
100 ; CHECK: ldp x0, x1, [x[[VARSTRUCT]]]
101 ; Make sure epilogue immediately follows
105 ; Large structs are passed by reference (storage allocated by caller
106 ; to preserve value semantics) in x8. Strictly this only applies to
107 ; structs larger than 16 bytes, but C semantics can still be provided
108 ; if LLVM does it to %myStruct too. So this is the simplest check
109 define void @return_large_struct(%myStruct* sret %retval) {
110 ; CHECK-LABEL: return_large_struct:
111 %addr0 = getelementptr %myStruct, %myStruct* %retval, i64 0, i32 0
112 %addr1 = getelementptr %myStruct, %myStruct* %retval, i64 0, i32 1
113 %addr2 = getelementptr %myStruct, %myStruct* %retval, i64 0, i32 2
115 store i64 42, i64* %addr0
116 store i8 2, i8* %addr1
117 store i32 9, i32* %addr2
118 ; CHECK: str {{x[0-9]+}}, [x8]
119 ; CHECK: strb {{w[0-9]+}}, [x8, #8]
120 ; CHECK: str {{w[0-9]+}}, [x8, #12]
125 ; This struct is just too far along to go into registers: (only x7 is
126 ; available, but it needs two). Also make sure that %stacked doesn't
127 ; sneak into x7 behind.
128 define i32 @struct_on_stack(i8 %var0, i16 %var1, i32 %var2, i64 %var3, i128 %var45,
129 i32* %var6, %myStruct* byval %struct, i32* byval %stacked,
130 double %notstacked) {
131 ; CHECK-LABEL: struct_on_stack:
132 %addr = getelementptr %myStruct, %myStruct* %struct, i64 0, i32 0
133 %val64 = load volatile i64, i64* %addr
134 store volatile i64 %val64, i64* @var64
135 ; Currently nothing on local stack, so struct should be at sp
136 ; CHECK: ldr [[VAL64:x[0-9]+]], [sp]
137 ; CHECK: str [[VAL64]], [{{x[0-9]+}}, {{#?}}:lo12:var64]
139 store volatile double %notstacked, double* @vardouble
141 ; CHECK: str d0, [{{x[0-9]+}}, {{#?}}:lo12:vardouble
142 ; CHECK-NOFP-NOT: str d0,
144 %retval = load volatile i32, i32* %stacked
146 ; CHECK-LE: ldr w0, [sp, #16]
149 define void @stacked_fpu(float %var0, double %var1, float %var2, float %var3,
150 float %var4, float %var5, float %var6, float %var7,
152 ; CHECK-LABEL: stacked_fpu:
153 store float %var8, float* @varfloat
154 ; Beware as above: the offset would be different on big-endian
155 ; machines if the first ldr were changed to use s-registers.
156 ; CHECK: ldr {{[ds]}}[[VALFLOAT:[0-9]+]], [sp]
157 ; CHECK: str s[[VALFLOAT]], [{{x[0-9]+}}, {{#?}}:lo12:varfloat]
162 ; 128-bit integer types should be passed in xEVEN, xODD rather than
163 ; the reverse. In this case x2 and x3. Nothing should use x1.
164 define i64 @check_i128_regalign(i32 %val0, i128 %val1, i64 %val2) {
165 ; CHECK-LABEL: check_i128_regalign
166 store i128 %val1, i128* @var128
167 ; CHECK-DAG: add x[[VAR128:[0-9]+]], {{x[0-9]+}}, :lo12:var128
168 ; CHECK-DAG: stp x2, x3, [x[[VAR128]]]
171 ; CHECK-DAG: mov x0, x4
174 define void @check_i128_stackalign(i32 %val0, i32 %val1, i32 %val2, i32 %val3,
175 i32 %val4, i32 %val5, i32 %val6, i32 %val7,
176 i32 %stack1, i128 %stack2) {
177 ; CHECK-LABEL: check_i128_stackalign
178 store i128 %stack2, i128* @var128
179 ; Nothing local on stack in current codegen, so first stack is 16 away
180 ; CHECK-LE: add x[[REG:[0-9]+]], sp, #16
181 ; CHECK-LE: ldr {{x[0-9]+}}, [x[[REG]], #8]
183 ; Important point is that we address sp+24 for second dword
185 ; CHECK: ldp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #16]
189 declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i1)
191 define i32 @test_extern() {
192 ; CHECK-LABEL: test_extern:
193 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 undef, i8* align 4 undef, i32 undef, i1 0)
199 ; A sub-i32 stack argument must be loaded on big endian with ldr{h,b}, not just
200 ; implicitly extended to a 32-bit load.
201 define i16 @stacked_i16(i32 %val0, i32 %val1, i32 %val2, i32 %val3,
202 i32 %val4, i32 %val5, i32 %val6, i32 %val7,
204 ; CHECK-LABEL: stacked_i16