189 lines
5.9 KiB
Plaintext
189 lines
5.9 KiB
Plaintext
|
# RUN: llc -run-pass=tailduplication -tail-dup-size=4 %s -o - | FileCheck %s
|
||
|
|
|
||
|
|
# JumpTableDest32 uses an `adr` to a temporary label (itself). If duplicated we
|
||
|
|
# cannot guarantee reachability for any uses after the first.
|
||
|
|
|
||
|
|
# CHECK: JumpTableDest32
|
||
|
|
# CHECK-NOT: JumpTableDest32
|
||
|
|
|
||
|
|
|
||
|
|
--- |
|
||
|
|
; ModuleID = 'jump-table.ll'
|
||
|
|
source_filename = "jump-table.ll"
|
||
|
|
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
|
||
|
|
target triple = "arm64-apple-ios"
|
||
|
|
|
||
|
|
define i32 @test_jumptable32(i32 %in, i1 %tst) {
|
||
|
|
br i1 %tst, label %true, label %false
|
||
|
|
|
||
|
|
true: ; preds = %0
|
||
|
|
call void @foo()
|
||
|
|
br label %switch
|
||
|
|
|
||
|
|
false: ; preds = %0
|
||
|
|
call void @bar()
|
||
|
|
br label %switch
|
||
|
|
|
||
|
|
lbl1: ; preds = %lbl4, %lbl3, %def, %switch
|
||
|
|
%merge = phi i32 [ 1, %switch ], [ 0, %def ], [ 4, %lbl3 ], [ 8, %lbl4 ]
|
||
|
|
ret i32 %merge
|
||
|
|
|
||
|
|
switch: ; preds = %false, %true
|
||
|
|
switch i32 %in, label %def [
|
||
|
|
i32 0, label %lbl1
|
||
|
|
i32 1, label %lbl2
|
||
|
|
i32 2, label %lbl3
|
||
|
|
i32 4, label %lbl4
|
||
|
|
]
|
||
|
|
|
||
|
|
def: ; preds = %switch
|
||
|
|
br label %lbl1
|
||
|
|
|
||
|
|
lbl2: ; preds = %switch
|
||
|
|
%1 = call i64 @llvm.aarch64.space(i32 262144, i64 undef)
|
||
|
|
ret i32 2
|
||
|
|
|
||
|
|
lbl3: ; preds = %switch
|
||
|
|
br label %lbl1
|
||
|
|
|
||
|
|
lbl4: ; preds = %switch
|
||
|
|
br label %lbl1
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @foo()
|
||
|
|
|
||
|
|
declare void @bar()
|
||
|
|
|
||
|
|
; Function Attrs: nounwind
|
||
|
|
declare i64 @llvm.aarch64.space(i32, i64) #0
|
||
|
|
|
||
|
|
attributes #0 = { nounwind }
|
||
|
|
|
||
|
|
...
|
||
|
|
---
|
||
|
|
name: test_jumptable32
|
||
|
|
alignment: 4
|
||
|
|
exposesReturnsTwice: false
|
||
|
|
legalized: false
|
||
|
|
regBankSelected: false
|
||
|
|
selected: false
|
||
|
|
failedISel: false
|
||
|
|
tracksRegLiveness: true
|
||
|
|
hasWinCFI: false
|
||
|
|
registers: []
|
||
|
|
liveins:
|
||
|
|
- { reg: '$w0', virtual-reg: '' }
|
||
|
|
- { reg: '$w1', virtual-reg: '' }
|
||
|
|
frameInfo:
|
||
|
|
isFrameAddressTaken: false
|
||
|
|
isReturnAddressTaken: false
|
||
|
|
hasStackMap: false
|
||
|
|
hasPatchPoint: false
|
||
|
|
stackSize: 32
|
||
|
|
offsetAdjustment: 0
|
||
|
|
maxAlignment: 8
|
||
|
|
adjustsStack: true
|
||
|
|
hasCalls: true
|
||
|
|
stackProtector: ''
|
||
|
|
maxCallFrameSize: 0
|
||
|
|
cvBytesOfCalleeSavedRegisters: 0
|
||
|
|
hasOpaqueSPAdjustment: false
|
||
|
|
hasVAStart: false
|
||
|
|
hasMustTailInVarArgFunc: false
|
||
|
|
localFrameSize: 0
|
||
|
|
savePoint: ''
|
||
|
|
restorePoint: ''
|
||
|
|
fixedStack: []
|
||
|
|
stack:
|
||
|
|
- { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
|
||
|
|
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
- { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
|
||
|
|
stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
- { id: 2, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8,
|
||
|
|
stack-id: default, callee-saved-register: '$x19', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
- { id: 3, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8,
|
||
|
|
stack-id: default, callee-saved-register: '$x20', callee-saved-restored: true,
|
||
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
||
|
|
callSites: []
|
||
|
|
constants: []
|
||
|
|
machineFunctionInfo:
|
||
|
|
hasRedZone: false
|
||
|
|
jumpTable:
|
||
|
|
kind: label-difference32
|
||
|
|
entries:
|
||
|
|
- id: 0
|
||
|
|
blocks: [ '%bb.9', '%bb.6', '%bb.7', '%bb.5', '%bb.8' ]
|
||
|
|
body: |
|
||
|
|
bb.0 (%ir-block.0):
|
||
|
|
successors: %bb.1(0x40000000), %bb.2(0x40000000)
|
||
|
|
liveins: $w0, $w1, $x19, $x20, $lr
|
||
|
|
|
||
|
|
early-clobber $sp = frame-setup STPXpre killed $x20, killed $x19, $sp, -4 :: (store 8 into %stack.3), (store 8 into %stack.2)
|
||
|
|
frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store 8 into %stack.1), (store 8 into %stack.0)
|
||
|
|
frame-setup CFI_INSTRUCTION def_cfa_offset 32
|
||
|
|
frame-setup CFI_INSTRUCTION offset $w30, -8
|
||
|
|
frame-setup CFI_INSTRUCTION offset $w29, -16
|
||
|
|
frame-setup CFI_INSTRUCTION offset $w19, -24
|
||
|
|
frame-setup CFI_INSTRUCTION offset $w20, -32
|
||
|
|
renamable $w19 = COPY $w0
|
||
|
|
TBZW killed renamable $w1, 0, %bb.2
|
||
|
|
|
||
|
|
bb.1.true:
|
||
|
|
successors: %bb.3(0x80000000)
|
||
|
|
liveins: $w19
|
||
|
|
|
||
|
|
BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
|
||
|
|
B %bb.3
|
||
|
|
|
||
|
|
bb.2.false:
|
||
|
|
successors: %bb.3(0x80000000)
|
||
|
|
liveins: $w19
|
||
|
|
|
||
|
|
BL @bar, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
|
||
|
|
B %bb.3
|
||
|
|
|
||
|
|
bb.3.switch:
|
||
|
|
successors: %bb.9(0x1c71c71c), %bb.6(0x1c71c71c), %bb.7(0x1c71c71c), %bb.5(0x0e38e38e), %bb.8(0x1c71c71c)
|
||
|
|
liveins: $w19
|
||
|
|
|
||
|
|
renamable $w8 = ORRWrs $wzr, killed renamable $w19, 0, implicit-def $x8
|
||
|
|
renamable $x9 = MOVaddrJT target-flags(aarch64-page) %jump-table.0, target-flags(aarch64-pageoff, aarch64-nc) %jump-table.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.5.def:
|
||
|
|
successors: %bb.9(0x80000000)
|
||
|
|
|
||
|
|
renamable $w0 = COPY $wzr
|
||
|
|
B %bb.9
|
||
|
|
|
||
|
|
bb.6.lbl2:
|
||
|
|
successors: %bb.9(0x80000000)
|
||
|
|
|
||
|
|
dead $xzr = SPACE 262144, undef renamable $x8
|
||
|
|
$w0 = MOVi32imm 2
|
||
|
|
B %bb.9
|
||
|
|
|
||
|
|
bb.7.lbl3:
|
||
|
|
successors: %bb.9(0x80000000)
|
||
|
|
|
||
|
|
renamable $w0 = MOVi32imm 4
|
||
|
|
B %bb.9
|
||
|
|
|
||
|
|
bb.8.lbl4:
|
||
|
|
successors: %bb.9(0x80000000)
|
||
|
|
|
||
|
|
renamable $w0 = MOVi32imm 8
|
||
|
|
|
||
|
|
bb.9.lbl1:
|
||
|
|
liveins: $w0
|
||
|
|
|
||
|
|
$fp, $lr = frame-destroy LDPXi $sp, 2 :: (load 8 from %stack.1), (load 8 from %stack.0)
|
||
|
|
early-clobber $sp, $x20, $x19 = frame-destroy LDPXpost $sp, 4 :: (load 8 from %stack.3), (load 8 from %stack.2)
|
||
|
|
RET_ReallyLR implicit $w0
|
||
|
|
|
||
|
|
...
|