llvm/test/CodeGen/Thumb/segmented-stacks.ll

   1 ; RUN: llc < %s -mtriple=thumb-linux-androideabi -verify-machineinstrs | FileCheck %s -check-prefix=Thumb-android
   2 ; RUN: llc < %s -mtriple=thumb-linux-unknown-gnueabi -verify-machineinstrs | FileCheck %s -check-prefix=Thumb-linux
   3 ; RUN: llc < %s -mtriple=thumb-linux-androideabi -filetype=obj
   4 ; RUN: llc < %s -mtriple=thumb-linux-unknown-gnueabi -filetype=obj
   5
   6
   7 ; Just to prevent the alloca from being optimized away
   8 declare void @dummy_use(i32*, i32)
   9
  10 define void @test_basic() #0 {
  11         %mem = alloca i32, i32 10
  12         call void @dummy_use (i32* %mem, i32 10)
  13         ret void
  14
  15 ; Thumb-android-LABEL:      test_basic:
  16
  17 ; Thumb-android:      push    {r4, r5}
  18 ; Thumb-android-NEXT: mov     r5, sp
  19 ; Thumb-android-NEXT: ldr     r4, .LCPI0_0
  20 ; Thumb-android-NEXT: ldr     r4, [r4]
  21 ; Thumb-android-NEXT: cmp     r4, r5
  22 ; Thumb-android-NEXT: blo     .LBB0_2
  23
  24 ; Thumb-android:      mov     r4, #48
  25 ; Thumb-android-NEXT: mov     r5, #0
  26 ; Thumb-android-NEXT: push    {lr}
  27 ; Thumb-android-NEXT: bl      __morestack
  28 ; Thumb-android-NEXT: pop     {r4}
  29 ; Thumb-android-NEXT: mov     lr, r4
  30 ; Thumb-android-NEXT: pop     {r4, r5}
  31 ; Thumb-android-NEXT: bx      lr
  32
  33 ; Thumb-android:      pop     {r4, r5}
  34
  35 ; Thumb-android: .p2align 2
  36 ; Thumb-android: .LCPI0_0:
  37 ; Thumb-android-NEXT: .long __STACK_LIMIT
  38
  39 ; Thumb-linux-LABEL:      test_basic:
  40
  41 ; Thumb-linux:      push    {r4, r5}
  42 ; Thumb-linux-NEXT: mov     r5, sp
  43 ; Thumb-linux-NEXT: ldr     r4, .LCPI0_0
  44 ; Thumb-linux-NEXT: ldr     r4, [r4]
  45 ; Thumb-linux-NEXT: cmp     r4, r5
  46 ; Thumb-linux-NEXT: blo     .LBB0_2
  47
  48 ; Thumb-linux:      mov     r4, #48
  49 ; Thumb-linux-NEXT: mov     r5, #0
  50 ; Thumb-linux-NEXT: push    {lr}
  51 ; Thumb-linux-NEXT: bl      __morestack
  52 ; Thumb-linux-NEXT: pop     {r4}
  53 ; Thumb-linux-NEXT: mov     lr, r4
  54 ; Thumb-linux-NEXT: pop     {r4, r5}
  55 ; Thumb-linux-NEXT: bx      lr
  56
  57 ; Thumb-linux:      pop     {r4, r5}
  58
  59 }
  60
  61 define i32 @test_nested(i32 * nest %closure, i32 %other) #0 {
  62        %addend = load i32 , i32 * %closure
  63        %result = add i32 %other, %addend
  64        %mem = alloca i32, i32 10
  65        call void @dummy_use (i32* %mem, i32 10)
  66        ret i32 %result
  67
  68 ; Thumb-android-LABEL:      test_nested:
  69
  70 ; Thumb-android:      push  {r4, r5}
  71 ; Thumb-android-NEXT: mov     r5, sp
  72 ; Thumb-android-NEXT: ldr     r4, .LCPI1_0
  73 ; Thumb-android-NEXT: ldr     r4, [r4]
  74 ; Thumb-android-NEXT: cmp     r4, r5
  75 ; Thumb-android-NEXT: blo     .LBB1_2
  76
  77 ; Thumb-android:      mov     r4, #56
  78 ; Thumb-android-NEXT: mov     r5, #0
  79 ; Thumb-android-NEXT: push    {lr}
  80 ; Thumb-android-NEXT: bl      __morestack
  81 ; Thumb-android-NEXT: pop     {r4}
  82 ; Thumb-android-NEXT: mov     lr, r4
  83 ; Thumb-android-NEXT: pop     {r4, r5}
  84 ; Thumb-android-NEXT: bx      lr
  85
  86 ; Thumb-android:      pop     {r4, r5}
  87
  88 ; Thumb-linux-LABEL:      test_nested:
  89
  90 ; Thumb-linux:      push    {r4, r5}
  91 ; Thumb-linux-NEXT: mov     r5, sp
  92 ; Thumb-linux-NEXT: ldr     r4, .LCPI1_0
  93 ; Thumb-linux-NEXT: ldr     r4, [r4]
  94 ; Thumb-linux-NEXT: cmp     r4, r5
  95 ; Thumb-linux-NEXT: blo     .LBB1_2
  96
  97 ; Thumb-linux:      mov     r4, #56
  98 ; Thumb-linux-NEXT: mov     r5, #0
  99 ; Thumb-linux-NEXT: push    {lr}
 100 ; Thumb-linux-NEXT: bl      __morestack
 101 ; Thumb-linux-NEXT: pop     {r4}
 102 ; Thumb-linux-NEXT: mov     lr, r4
 103 ; Thumb-linux-NEXT: pop     {r4, r5}
 104 ; Thumb-linux-NEXT: bx      lr
 105
 106 ; Thumb-linux:      pop     {r4, r5}
 107
 108 }
 109
 110 define void @test_large() #0 {
 111         %mem = alloca i32, i32 10000
 112         call void @dummy_use (i32* %mem, i32 0)
 113         ret void
 114
 115 ; Thumb-android-LABEL:      test_large:
 116
 117 ; Thumb-android:      push    {r4, r5}
 118 ; Thumb-android-NEXT: mov     r5, sp
 119 ; Thumb-android-NEXT: ldr     r4, .LCPI2_2
 120 ; Thumb-android-NEXT: sub     r5, r5, r4
 121 ; Thumb-android-NEXT: ldr     r4, .LCPI2_3
 122 ; Thumb-android-NEXT: ldr     r4, [r4]
 123 ; Thumb-android-NEXT: cmp     r4, r5
 124 ; Thumb-android-NEXT: blo     .LBB2_2
 125
 126 ; Thumb-android:      ldr     r4, .LCPI2_2
 127 ; Thumb-android-NEXT: mov     r5, #0
 128 ; Thumb-android-NEXT: push    {lr}
 129 ; Thumb-android-NEXT: bl      __morestack
 130 ; Thumb-android-NEXT: pop     {r4}
 131 ; Thumb-android-NEXT: mov     lr, r4
 132 ; Thumb-android-NEXT: pop     {r4, r5}
 133 ; Thumb-android-NEXT: bx      lr
 134
 135 ; Thumb-android:      pop     {r4, r5}
 136
 137 ; Thumb-android:      .LCPI2_2:
 138 ; Thumb-android-NEXT: .long   40192
 139
 140 ; Thumb-linux-LABEL:      test_large:
 141
 142 ; Thumb-linux:      push    {r4, r5}
 143 ; Thumb-linux-NEXT: mov     r5, sp
 144 ; Thumb-linux-NEXT: ldr     r4, .LCPI2_2
 145 ; Thumb-linux-NEXT: sub     r5, r5, r4
 146 ; Thumb-linux-NEXT: ldr     r4, .LCPI2_3
 147 ; Thumb-linux-NEXT: ldr     r4, [r4]
 148 ; Thumb-linux-NEXT: cmp     r4, r5
 149 ; Thumb-linux-NEXT: blo     .LBB2_2
 150
 151 ; Thumb-linux:      ldr     r4, .LCPI2_2
 152 ; Thumb-linux-NEXT: mov     r5, #0
 153 ; Thumb-linux-NEXT: push    {lr}
 154 ; Thumb-linux-NEXT: bl      __morestack
 155 ; Thumb-linux-NEXT: pop     {r4}
 156 ; Thumb-linux-NEXT: mov     lr, r4
 157 ; Thumb-linux-NEXT: pop     {r4, r5}
 158 ; Thumb-linux-NEXT: bx      lr
 159
 160 ; Thumb-linux:      pop     {r4, r5}
 161
 162 }
 163
 164 define fastcc void @test_fastcc() #0 {
 165         %mem = alloca i32, i32 10
 166         call void @dummy_use (i32* %mem, i32 10)
 167         ret void
 168
 169 ; Thumb-android-LABEL:      test_fastcc:
 170
 171 ; Thumb-android:      push    {r4, r5}
 172 ; Thumb-android-NEXT: mov     r5, sp
 173 ; Thumb-android-NEXT: ldr     r4, .LCPI3_0
 174 ; Thumb-android-NEXT: ldr     r4, [r4]
 175 ; Thumb-android-NEXT: cmp     r4, r5
 176 ; Thumb-android-NEXT: blo     .LBB3_2
 177
 178 ; Thumb-android:      mov     r4, #48
 179 ; Thumb-android-NEXT: mov     r5, #0
 180 ; Thumb-android-NEXT: push    {lr}
 181 ; Thumb-android-NEXT: bl      __morestack
 182 ; Thumb-android-NEXT: pop     {r4}
 183 ; Thumb-android-NEXT: mov     lr, r4
 184 ; Thumb-android-NEXT: pop     {r4, r5}
 185 ; Thumb-android-NEXT: bx      lr
 186
 187 ; Thumb-android:      pop     {r4, r5}
 188
 189 ; Thumb-linux-LABEL:      test_fastcc:
 190
 191 ; Thumb-linux:      push    {r4, r5}
 192 ; Thumb-linux-NEXT: mov     r5, sp
 193 ; Thumb-linux-NEXT: ldr     r4, .LCPI3_0
 194 ; Thumb-linux-NEXT: ldr     r4, [r4]
 195 ; Thumb-linux-NEXT: cmp     r4, r5
 196 ; Thumb-linux-NEXT: blo     .LBB3_2
 197
 198 ; Thumb-linux:      mov     r4, #48
 199 ; Thumb-linux-NEXT: mov     r5, #0
 200 ; Thumb-linux-NEXT: push    {lr}
 201 ; Thumb-linux-NEXT: bl      __morestack
 202 ; Thumb-linux-NEXT: pop     {r4}
 203 ; Thumb-linux-NEXT: mov     lr, r4
 204 ; Thumb-linux-NEXT: pop     {r4, r5}
 205 ; Thumb-linux-NEXT: bx      lr
 206
 207 ; Thumb-linux:      pop     {r4, r5}
 208
 209 }
 210
 211 define fastcc void @test_fastcc_large() #0 {
 212         %mem = alloca i32, i32 10000
 213         call void @dummy_use (i32* %mem, i32 0)
 214         ret void
 215
 216 ; Thumb-android-LABEL:      test_fastcc_large:
 217
 218 ; Thumb-android:      push    {r4, r5}
 219 ; Thumb-android-NEXT: mov     r5, sp
 220 ; Thumb-android-NEXT: ldr     r4, .LCPI4_2
 221 ; Thumb-android-NEXT: sub     r5, r5, r4
 222 ; Thumb-android-NEXT: ldr     r4, .LCPI4_3
 223 ; Thumb-android-NEXT: ldr     r4, [r4]
 224 ; Thumb-android-NEXT: cmp     r4, r5
 225 ; Thumb-android-NEXT: blo     .LBB4_2
 226
 227 ; Thumb-android:      ldr     r4, .LCPI4_2
 228 ; Thumb-android-NEXT: mov     r5, #0
 229 ; Thumb-android-NEXT: push    {lr}
 230 ; Thumb-android-NEXT: bl      __morestack
 231 ; Thumb-android-NEXT: pop     {r4}
 232 ; Thumb-android-NEXT: mov     lr, r4
 233 ; Thumb-android-NEXT: pop     {r4, r5}
 234 ; Thumb-android-NEXT: bx      lr
 235
 236 ; Thumb-android:      pop     {r4, r5}
 237
 238 ; Thumb-android:      .LCPI4_2:
 239 ; Thumb-android-NEXT: .long   40192
 240
 241 ; Thumb-linux-LABEL:      test_fastcc_large:
 242
 243 ; Thumb-linux:      push    {r4, r5}
 244 ; Thumb-linux-NEXT: mov     r5, sp
 245 ; Thumb-linux-NEXT: ldr     r4, .LCPI4_2
 246 ; Thumb-linux-NEXT: sub     r5, r5, r4
 247 ; Thumb-linux-NEXT: ldr     r4, .LCPI4_3
 248 ; Thumb-linux-NEXT: ldr     r4, [r4]
 249 ; Thumb-linux-NEXT: cmp     r4, r5
 250 ; Thumb-linux-NEXT: blo     .LBB4_2
 251
 252 ; Thumb-linux:      ldr     r4, .LCPI4_2
 253 ; Thumb-linux-NEXT: mov     r5, #0
 254 ; Thumb-linux-NEXT: push    {lr}
 255 ; Thumb-linux-NEXT: bl      __morestack
 256 ; Thumb-linux-NEXT: pop     {r4}
 257 ; Thumb-linux-NEXT: mov     lr, r4
 258 ; Thumb-linux-NEXT: pop     {r4, r5}
 259 ; Thumb-linux-NEXT: bx      lr
 260
 261 ; Thumb-linux:      pop     {r4, r5}
 262
 263 ; Thumb-linux:      .LCPI4_2:
 264 ; Thumb-linux-NEXT: .long   40192
 265
 266 }
 267
 268 define void @test_nostack() #0 {
 269         ret void
 270
 271 ; Thumb-android-LABEL: test_nostack:
 272 ; Thumb-android-NOT:   bl __morestack
 273
 274 ; Thumb-linux-LABEL: test_nostack:
 275 ; Thumb-linux-NOT:   bl __morestack
 276 }
 277
 278
 279 declare void @panic() unnamed_addr
 280
 281 ; We used to crash while compiling the following function.
 282 ; Thumb-linux-LABEL: build_should_not_segfault:
 283 ; Thumb-android-LABEL: build_should_not_segfault:
 284 define void @build_should_not_segfault(i8 %x) unnamed_addr #0 {
 285 start:
 286   %_0 = icmp ult i8 %x, 16
 287   %or.cond = select i1 undef, i1 true, i1 %_0
 288   br i1 %or.cond, label %bb1, label %bb2
 289
 290 bb1:
 291   ret void
 292
 293 bb2:
 294   call void @panic()
 295   unreachable
 296 }
 297
 298 attributes #0 = { "split-stack" }