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Add a computed goto test
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‎llvm/test/CodeGen/X86/tail-dup-computed-goto.mir

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
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# RUN: llc -mtriple=x86_64-unknown-linux-gnu -run-pass=early-tailduplication -tail-dup-size=0 %s -o - | FileCheck %s
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# Check that only the computed goto is duplicated.
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--- |
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declare i64 @f0()
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declare i64 @f1()
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declare i64 @f2()
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declare i64 @f3()
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declare i64 @f4()
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declare i64 @f5()
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@computed_goto.dispatch = external global [5 x ptr]
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define void @computed_goto() { ret void }
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define void @jump_table() { ret void }
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...
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---
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name: computed_goto
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: computed_goto
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; CHECK: bb.0:
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; CHECK-NEXT: successors: %bb.1(0x20000000), %bb.2(0x20000000), %bb.3(0x20000000), %bb.4(0x20000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f0, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr64_nosp = COPY [[COPY]]
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; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr64_nosp = COPY [[COPY1]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[COPY1]], @computed_goto.dispatch, $noreg
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.1:
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; CHECK-NEXT: successors: %bb.1(0x20000000), %bb.2(0x20000000), %bb.3(0x20000000), %bb.4(0x20000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f1, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY3:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY4:%[0-9]+]]:gr64_nosp = COPY [[COPY3]]
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; CHECK-NEXT: [[COPY5:%[0-9]+]]:gr64_nosp = COPY [[COPY4]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[COPY4]], @computed_goto.dispatch, $noreg
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.2:
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; CHECK-NEXT: successors: %bb.1(0x20000000), %bb.2(0x20000000), %bb.3(0x20000000), %bb.4(0x20000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f2, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY7:%[0-9]+]]:gr64_nosp = COPY [[COPY6]]
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; CHECK-NEXT: [[COPY8:%[0-9]+]]:gr64_nosp = COPY [[COPY7]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[COPY7]], @computed_goto.dispatch, $noreg
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.3:
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; CHECK-NEXT: successors: %bb.1(0x20000000), %bb.2(0x20000000), %bb.3(0x20000000), %bb.4(0x20000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f3, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY9:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY10:%[0-9]+]]:gr64_nosp = COPY [[COPY9]]
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; CHECK-NEXT: [[COPY11:%[0-9]+]]:gr64_nosp = COPY [[COPY10]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[COPY10]], @computed_goto.dispatch, $noreg
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.4:
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; CHECK-NEXT: successors: %bb.1(0x20000000), %bb.2(0x20000000), %bb.3(0x20000000), %bb.4(0x20000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f4, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY12:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY13:%[0-9]+]]:gr64_nosp = COPY [[COPY12]]
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; CHECK-NEXT: [[COPY14:%[0-9]+]]:gr64_nosp = COPY [[COPY13]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[COPY13]], @computed_goto.dispatch, $noreg
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bb.0:
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @f0, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%6:gr64 = COPY $rax
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%0:gr64 = COPY %6
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JMP_1 %bb.5
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bb.1:
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @f1, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%10:gr64 = COPY $rax
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%1:gr64 = COPY %10
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JMP_1 %bb.5
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90+
bb.2:
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @f2, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%9:gr64 = COPY $rax
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%2:gr64 = COPY %9
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JMP_1 %bb.5
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bb.3:
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @f3, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%8:gr64 = COPY $rax
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%3:gr64 = COPY %8
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JMP_1 %bb.5
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106+
bb.4:
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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CALL64pcrel32 target-flags(x86-plt) @f4, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%7:gr64 = COPY $rax
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%4:gr64 = COPY %7
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bb.5:
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successors: %bb.1, %bb.2, %bb.3, %bb.4
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%5:gr64_nosp = PHI %0, %bb.0, %4, %bb.4, %3, %bb.3, %2, %bb.2, %1, %bb.1
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JMP64m $noreg, 8, %5, @computed_goto.dispatch, $noreg
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...
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---
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name: jump_table
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tracksRegLiveness: true
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jumpTable:
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kind: block-address
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entries:
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- id: 0
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blocks: [ '%bb.2', '%bb.3', '%bb.4', '%bb.5', '%bb.6' ]
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body: |
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; CHECK-LABEL: name: jump_table
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; CHECK: bb.0:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f0, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr64 = COPY [[COPY]]
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; CHECK-NEXT: [[DEC64r:%[0-9]+]]:gr64_nosp = DEC64r [[COPY1]], implicit-def dead $eflags
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; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr64 = COPY [[COPY1]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r]], %jump-table.0, $noreg :: (load (s64) from jump-table)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.3:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f1, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY3:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY4:%[0-9]+]]:gr64 = COPY [[COPY3]]
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; CHECK-NEXT: [[DEC64r1:%[0-9]+]]:gr64_nosp = DEC64r [[COPY4]], implicit-def dead $eflags
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; CHECK-NEXT: [[COPY5:%[0-9]+]]:gr64 = COPY [[COPY4]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r1]], %jump-table.0, $noreg :: (load (s64) from jump-table)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.4:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f2, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY7:%[0-9]+]]:gr64 = COPY [[COPY6]]
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; CHECK-NEXT: [[DEC64r2:%[0-9]+]]:gr64_nosp = DEC64r [[COPY7]], implicit-def dead $eflags
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; CHECK-NEXT: [[COPY8:%[0-9]+]]:gr64 = COPY [[COPY7]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r2]], %jump-table.0, $noreg :: (load (s64) from jump-table)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.5:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f3, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY9:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY10:%[0-9]+]]:gr64 = COPY [[COPY9]]
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; CHECK-NEXT: [[DEC64r3:%[0-9]+]]:gr64_nosp = DEC64r [[COPY10]], implicit-def dead $eflags
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; CHECK-NEXT: [[COPY11:%[0-9]+]]:gr64 = COPY [[COPY10]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r3]], %jump-table.0, $noreg :: (load (s64) from jump-table)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.6:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f4, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY12:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY13:%[0-9]+]]:gr64 = COPY [[COPY12]]
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; CHECK-NEXT: [[DEC64r4:%[0-9]+]]:gr64_nosp = DEC64r [[COPY13]], implicit-def dead $eflags
187+
; CHECK-NEXT: [[COPY14:%[0-9]+]]:gr64 = COPY [[COPY13]]
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; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r4]], %jump-table.0, $noreg :: (load (s64) from jump-table)
189+
; CHECK-NEXT: {{ $}}
190+
; CHECK-NEXT: bb.7:
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; CHECK-NEXT: successors: %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a), %bb.7(0x1999999a)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
194+
; CHECK-NEXT: CALL64pcrel32 target-flags(x86-plt) @f5, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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; CHECK-NEXT: ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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; CHECK-NEXT: [[COPY15:%[0-9]+]]:gr64 = COPY $rax
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; CHECK-NEXT: [[COPY16:%[0-9]+]]:gr64 = COPY [[COPY15]]
198+
; CHECK-NEXT: [[DEC64r5:%[0-9]+]]:gr64_nosp = DEC64r [[COPY16]], implicit-def dead $eflags
199+
; CHECK-NEXT: [[COPY17:%[0-9]+]]:gr64 = COPY [[COPY16]]
200+
; CHECK-NEXT: JMP64m $noreg, 8, [[DEC64r5]], %jump-table.0, $noreg :: (load (s64) from jump-table)
201+
; CHECK-NEXT: {{ $}}
202+
; CHECK-NEXT: bb.8:
203+
bb.0:
204+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
205+
CALL64pcrel32 target-flags(x86-plt) @f0, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
206+
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
207+
%7:gr64 = COPY $rax
208+
%0:gr64 = COPY %7
209+
210+
bb.1:
211+
%1:gr64 = PHI %0, %bb.0, %6, %bb.6, %5, %bb.5, %4, %bb.4, %3, %bb.3, %2, %bb.2
212+
%8:gr64_nosp = DEC64r %1, implicit-def dead $eflags
213+
214+
bb.8:
215+
successors: %bb.2(0x1999999a), %bb.3(0x1999999a), %bb.4(0x1999999a), %bb.5(0x1999999a), %bb.6(0x1999999a)
216+
217+
JMP64m $noreg, 8, %8, %jump-table.0, $noreg :: (load (s64) from jump-table)
218+
219+
bb.2:
220+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
221+
CALL64pcrel32 target-flags(x86-plt) @f1, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
222+
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
223+
%13:gr64 = COPY $rax
224+
%2:gr64 = COPY %13
225+
JMP_1 %bb.1
226+
227+
bb.3:
228+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
229+
CALL64pcrel32 target-flags(x86-plt) @f2, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
230+
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%12:gr64 = COPY $rax
232+
%3:gr64 = COPY %12
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JMP_1 %bb.1
234+
235+
bb.4:
236+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
237+
CALL64pcrel32 target-flags(x86-plt) @f3, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
238+
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
239+
%11:gr64 = COPY $rax
240+
%4:gr64 = COPY %11
241+
JMP_1 %bb.1
242+
243+
bb.5:
244+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
245+
CALL64pcrel32 target-flags(x86-plt) @f4, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
246+
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%10:gr64 = COPY $rax
248+
%5:gr64 = COPY %10
249+
JMP_1 %bb.1
250+
251+
bb.6:
252+
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
253+
CALL64pcrel32 target-flags(x86-plt) @f5, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
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%9:gr64 = COPY $rax
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%6:gr64 = COPY %9
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JMP_1 %bb.1
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bb.7:
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...

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