# 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 }
define void @test_bb_alignment_not_byte_compressable() { 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 $w0
...
---
name: test_bb_alignment_not_byte_compressable
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$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
; Ensure there's no jump table compression when block alignments are bigger
; than the function alignment because we don't known the padding length at
; the point where compression is done.
; CHECK-LABEL: test_bb_alignment_not_byte_compressable
; CHECK-LABEL: bb.1
; CHECK: JumpTableDest16
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
$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 is aligned to make it more that 256 instructions away from bb.1, which
; means we can no longer assume the jump table will be byte indexable.
bb.5 (align 1024):
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
...
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