1 # RUN: llc -run-pass=tailduplication -tail-dup-size=4 %s -o - | FileCheck %s
2 # RUN: llc -passes=tailduplication -tail-dup-size=4 %s -o - | FileCheck %s
4 # JumpTableDest32 uses an `adr` to a temporary label (itself). If duplicated we
5 # cannot guarantee reachability for any uses after the first.
7 # CHECK: JumpTableDest32
8 # CHECK-NOT: JumpTableDest32
12 ; ModuleID = 'jump-table.ll'
13 source_filename = "jump-table.ll"
14 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
15 target triple = "arm64-apple-ios"
17 define i32 @test_jumptable32(i32 %in, i1 %tst) {
18 br i1 %tst, label %true, label %false
28 lbl1: ; preds = %lbl4, %lbl3, %def, %switch
29 %merge = phi i32 [ 1, %switch ], [ 0, %def ], [ 4, %lbl3 ], [ 8, %lbl4 ]
32 switch: ; preds = %false, %true
33 switch i32 %in, label %def [
40 def: ; preds = %switch
43 lbl2: ; preds = %switch
44 %1 = call i64 @llvm.aarch64.space(i32 262144, i64 undef)
47 lbl3: ; preds = %switch
50 lbl4: ; preds = %switch
58 ; Function Attrs: nounwind
59 declare i64 @llvm.aarch64.space(i32, i64) #0
61 attributes #0 = { nounwind }
65 name: test_jumptable32
67 exposesReturnsTwice: false
69 regBankSelected: false
72 tracksRegLiveness: true
76 - { reg: '$w0', virtual-reg: '' }
77 - { reg: '$w1', virtual-reg: '' }
79 isFrameAddressTaken: false
80 isReturnAddressTaken: false
90 cvBytesOfCalleeSavedRegisters: 0
91 hasOpaqueSPAdjustment: false
93 hasMustTailInVarArgFunc: false
99 - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
100 stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
101 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
102 - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
103 stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true,
104 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
105 - { id: 2, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8,
106 stack-id: default, callee-saved-register: '$x19', callee-saved-restored: true,
107 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
108 - { id: 3, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8,
109 stack-id: default, callee-saved-register: '$x20', callee-saved-restored: true,
110 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
116 kind: label-difference32
119 blocks: [ '%bb.9', '%bb.6', '%bb.7', '%bb.5', '%bb.8' ]
122 successors: %bb.1(0x40000000), %bb.2(0x40000000)
123 liveins: $w0, $w1, $x19, $x20, $lr
125 early-clobber $sp = frame-setup STPXpre killed $x20, killed $x19, $sp, -4 :: (store (s64) into %stack.3), (store (s64) into %stack.2)
126 frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.1), (store (s64) into %stack.0)
127 frame-setup CFI_INSTRUCTION def_cfa_offset 32
128 frame-setup CFI_INSTRUCTION offset $w30, -8
129 frame-setup CFI_INSTRUCTION offset $w29, -16
130 frame-setup CFI_INSTRUCTION offset $w19, -24
131 frame-setup CFI_INSTRUCTION offset $w20, -32
132 renamable $w19 = COPY $w0
133 TBZW killed renamable $w1, 0, %bb.2
136 successors: %bb.3(0x80000000)
139 BL @foo, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
143 successors: %bb.3(0x80000000)
146 BL @bar, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp
150 successors: %bb.9(0x1c71c71c), %bb.6(0x1c71c71c), %bb.7(0x1c71c71c), %bb.5(0x0e38e38e), %bb.8(0x1c71c71c)
153 renamable $w8 = ORRWrs $wzr, killed renamable $w19, 0, implicit-def $x8
154 renamable $x9 = MOVaddrJT target-flags(aarch64-page) %jump-table.0, target-flags(aarch64-pageoff, aarch64-nc) %jump-table.0
155 early-clobber renamable $x10, dead early-clobber renamable $x11 = JumpTableDest32 killed renamable $x9, killed renamable $x8, %jump-table.0
156 BR killed renamable $x10
159 successors: %bb.9(0x80000000)
161 renamable $w0 = COPY $wzr
165 successors: %bb.9(0x80000000)
167 dead $xzr = SPACE 262144, undef renamable $x8
172 successors: %bb.9(0x80000000)
174 renamable $w0 = MOVi32imm 4
178 successors: %bb.9(0x80000000)
180 renamable $w0 = MOVi32imm 8
185 $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
186 early-clobber $sp, $x20, $x19 = frame-destroy LDPXpost $sp, 4 :: (load (s64) from %stack.3), (load (s64) from %stack.2)
187 RET_ReallyLR implicit $w0