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# RUN: llc %s -run-pass=postra-machine-sink -o - | FileCheck %s
--- |
; Module stripped of everything, MIR below is what's interesting
; ModuleID = '<stdin>'
source_filename = "justacall.cpp"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: noinline norecurse nounwind uwtable
define dso_local i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 {
entry:
br label %if.end
if.end:
br label %return
return:
ret i32 0
}
!0 = !{!"dummy metadata"}
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
!3 = !DIFile(filename: "justacall.cpp", directory: "/tmp")
!4 = !{}
!5 = !{!0}
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 7, type: !15, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !20)
!15 = !DISubroutineType(types: !16)
!16 = !{!7, !7}
!20 = !{!21}
!21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 7, type: !7)
...
---
name: main
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers:
liveins:
- { reg: '$edi', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: true
stackProtector: ''
maxCallFrameSize: 4294967295
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack:
stack:
constants:
body: |
bb.0.entry:
successors: %bb.2(0x40000000), %bb.1(0x40000000)
liveins: $edi
; Test that the DBG_VALUE on ebx below is sunk with the def of ebx, despite
; not being adjacent to the def, see PR38952
DBG_VALUE $edi, $noreg, !21, !DIExpression()
renamable $ebx = COPY $edi
renamable $eax = MOV32r0 implicit-def dead $eflags
DBG_VALUE $ebx, $noreg, !21, !DIExpression()
CMP32ri $edi, 255, implicit-def $eflags
JCC_1 %bb.2, 15, implicit killed $eflags
JMP_1 %bb.1
bb.1.if.end:
; CHECK-LABEL: bb.1.if.end
successors: %bb.2(0x80000000)
liveins: $ebx
; CHECK: $ebx = COPY $edi
; CHECK-NEXT: DBG_VALUE $ebx
renamable $rdx = MOVSX64rr32 renamable $ebx
renamable $rdx = nsw SHL64ri killed renamable $rdx, 2, implicit-def dead $eflags
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = MOV32ri64 0
$esi = MOV32r0 implicit-def dead $eflags
CALL64pcrel32 &memset, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit killed $esi, implicit $rdx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.2.return:
liveins: $eax
RET 0, $eax
...
|
