test/CodeGen/AArch64/jump-table-compress.mir

# RUN: llc -mtriple=aarch64-linux-gnu %s -run-pass=aarch64-jump-tables -o - | FileCheck %s
--- |
  define i32 @test_jumptable(i32 %in) {
    unreachable
  }

  define void @test_inline_asm_no_compress() { ret void }

...
---
name:            test_jumptable
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    0
  adjustsStack:    false
  hasCalls:        false
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
jumpTable:
  kind:            block-address
  entries:
    - id:              0
      blocks:          [ '%bb.2', '%bb.3' ]
    - id:              1
      blocks:          [ '%bb.4', '%bb.5' ]
    - id:              2
      blocks:          [ '%bb.7' ]
    - id:              3
      blocks:          [ '%bb.9' ]
    - id:              4
      blocks:          [ '%bb.9' ]
    - id:              5
      blocks:          [ '%bb.11' ]
body:             |
  bb.0 (%ir-block.0):
    liveins: $x8

  bb.1 (%ir-block.0):
    ; CHECK-LABEL: body:
    ; CHECK-LABEL: bb.1
    ; CHECK: JumpTableDest8
    liveins: $x8
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.0
    BR killed $x10

  bb.2:
    ; Last destination is 4 * 255 = 1020 bytes after first. Byte is OK.
    dead $xzr = SPACE 1020, undef $xzr

  bb.3:
    ; CHECK-LABEL: bb.3
    ; CHECK: JumpTableDest16
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.1
    BR killed $x10

  bb.4:
    ; Last destination is 4 * 256 = 1024 bytes after first. Half needed.
    dead $xzr = SPACE 1024, undef $xzr

  bb.5:
    ; CHECK-LABEL: bb.5
    ; CHECK: JumpTableDest8
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.2
    BR killed $x10

  bb.6:
    ; First destination is (2^20 - 4) after reference. Just reachable by ADR so can use compressed table.
    dead $xzr = SPACE 1048556, undef $xzr

  bb.7:
    ; CHECK-LABEL: bb.7
    ; CHECK: JumpTableDest32
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.3
    BR killed $x10

  bb.8:
    ; First destination is 2^20 after reference. Compressed table cannot reach it.
    dead $xzr = SPACE 1048560, undef $xzr

  bb.9:
    ; First destination is 2^20 before reference. Just within reach of ADR.
    dead $xzr = SPACE 1048576, undef $xzr

  bb.10:
    ; CHECK-LABEL: bb.10
    ; CHECK: JumpTableDest8
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.4
    BR killed $x10

  bb.11:
    ; First destination is 2^20 before reference. Just within reach of ADR.
    dead $xzr = SPACE 1048580, undef $xzr

  bb.12:
    ; CHECK-LABEL: bb.12
    ; CHECK: JumpTableDest32
    early-clobber $x10, dead early-clobber $x11 = JumpTableDest32 undef killed $x9, undef killed $x8, %jump-table.5
    BR killed $x10
...
---
name:            test_inline_asm_no_compress
alignment:       4
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
  - { reg: '$w1' }
  - { reg: '$w2' }
frameInfo:
  maxAlignment:    1
  maxCallFrameSize: 0
machineFunctionInfo:
  hasRedZone:      false
jumpTable:
  kind:            label-difference32
  entries:
    - id:              0
      blocks:          [ '%bb.2', '%bb.4', '%bb.5', '%bb.6', '%bb.7', '%bb.8' ]
body:             |
  bb.0:
    successors: %bb.3(0x12492492), %bb.1(0x6db6db6e)
    liveins: $w0, $w1, $w2
  
    dead $wzr = SUBSWri renamable $w0, 5, 0, implicit-def $nzcv
    Bcc 8, %bb.3, implicit $nzcv
  
  bb.1:
    successors: %bb.2, %bb.4, %bb.5, %bb.6, %bb.7, %bb.8
    liveins: $w0, $w1, $w2
    ; We check that if there's an inline asm instruction in the jump table,
    ; that we skip compression. This is due to not being able to rely on
    ; finding the instruction size in some cases.
    ; CHECK-LABEL: test_inline_asm_no_compress
    ; CHECK-LABEL: bb.1
    ; CHECK: JumpTableDest32
    renamable $w8 = ORRWrs $wzr, killed renamable $w0, 0, implicit-def $x8
    $x9 = ADRP target-flags(aarch64-page) %jump-table.0
    renamable $x9 = ADDXri $x9, target-flags(aarch64-pageoff, aarch64-nc) %jump-table.0, 0
    early-clobber renamable $x10, dead early-clobber renamable $x11 = JumpTableDest32 killed renamable $x9, killed renamable $x8, %jump-table.0
    BR killed renamable $x10
  
  bb.2:
    liveins: $w1, $w2
  
    INLINEASM &".byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09", 1 /* sideeffect attdialect */
    INLINEASM &".byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09.byte 0x1f,0x20,0x03,0xd5,0x1f,0x20,0x03,0xd5\0A\09", 1 /* sideeffect attdialect */
    $w0 = ADDWrs killed renamable $w2, killed renamable $w1, 0
    RET undef $lr, implicit $w0
  
  bb.3:
    $w0 = MOVZWi 0, 0
    RET undef $lr, implicit $w0
  
  bb.4:
    liveins: $w1, $w2
  
    renamable $w0 = nsw MADDWrrr killed renamable $w2, killed renamable $w1, $wzr
    RET undef $lr, implicit $w0
  
  bb.5:
    liveins: $w1, $w2
  
    $w0 = SUBWrs killed renamable $w1, killed renamable $w2, 0
    RET undef $lr, implicit $w0
  
  bb.6:
    liveins: $w1, $w2
  
    $w0 = SUBWrs killed renamable $w2, killed renamable $w1, 0
    RET undef $lr, implicit $w0
  
  bb.7:
    liveins: $w1, $w2
  
    renamable $w0 = MADDWrrr killed renamable $w1, renamable $w1, killed renamable $w2
    RET undef $lr, implicit $w0
  
  bb.8:
    liveins: $w1, $w2
  
    renamable $w8 = nsw MADDWrrr renamable $w2, renamable $w2, $wzr
    renamable $w0 = MADDWrrr killed renamable $w8, killed renamable $w2, killed renamable $w1
    RET undef $lr, implicit $w0

...