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| # RUN: llc -mtriple=x86_64-unknown-unknown %s -run-pass=postra-machine-sink -o - | FileCheck %s
# Test that when we run the postra machine sinker (which sinks COPYs), that
# DBG_VALUEs of both sub and super-registers that depend on such COPYs are
# sunk with them.
--- |
; 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) !dbg !14 {
entry:
br label %return
return:
ret i32 0
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!1, !1000}
!0 = !{!"dummy metadata"}
!1 = !{i32 2, !"Dwarf Version", i32 4}
!1000 = !{i32 2, !"Debug Info Version", i32 3}
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, nameTableKind: None)
!3 = !DIFile(filename: "justacall.cpp", directory: "/tmp")
!4 = !{}
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!8 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
!9 = !DIBasicType(name: "int", size: 16, 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, !22, !23, !24}
!21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 7, type: !7)
!22 = !DILocalVariable(name: "foo", scope: !14, file: !3, line: 7, type: !8)
!23 = !DILocalVariable(name: "bar", scope: !14, file: !3, line: 7, type: !7)
!24 = !DILocalVariable(name: "baz", scope: !14, file: !3, line: 7, type: !9)
!100 = !DILocation(line: 1, scope: !14)
...
---
name: main
tracksRegLiveness: true
registers:
liveins:
- { reg: '$edi', virtual-reg: '' }
frameInfo:
hasCalls: true
fixedStack:
stack:
constants:
body: |
; CHECK: ![[ARGVAR:[0-9]+]] = !DILocalVariable(name: "argc",
; CHECK: ![[FOOVAR:[0-9]+]] = !DILocalVariable(name: "foo",
; CHECK: ![[BARVAR:[0-9]+]] = !DILocalVariable(name: "bar",
; CHECK: ![[BAZVAR:[0-9]+]] = !DILocalVariable(name: "baz",
; In the following code, the:
; DBG_VALUE of $edi should not sink: it's an argument
; DBG_VALUE of $ebx should sink: it's a standard copy
; DBG_VALUE of $bx should sink: a write of its superregister sinks
; DBG_VALUE of $ecx should sink: a write of one of its subregisters sinks
; CHECK-LABEL: name: main
; CHECK: bb.0.entry:
; CHECK: successors: %bb.1(0x80000000)
; CHECK: liveins: $edi
; CHECK: DBG_VALUE $edi, $noreg, ![[BARVAR]]
; CHECK-NEXT: DBG_VALUE $edi, $noreg, ![[ARGVAR]]
; CHECK-NEXT: DBG_VALUE $noreg, $noreg, ![[BAZVAR]]
; CHECK-NEXT: renamable $cl = MOV8ri 1
; CHECK-NEXT: DBG_VALUE $noreg, $noreg, ![[FOOVAR]]
; CHECK-NEXT: JMP_1 %bb.1
; CHECK: bb.1.return:
; CHECK: liveins: $cl, $edi
; CHECK: renamable $ebx = COPY $edi
; CHECK-NEXT: DBG_VALUE $bx, $noreg, ![[BAZVAR]]
; CHECK-NEXT: DBG_VALUE $ebx, $noreg, ![[ARGVAR]]
; CHECK-NEXT: renamable $ch = COPY renamable $cl
; CHECK-NEXT: DBG_VALUE $ecx, $noreg, ![[FOOVAR]]
; CHECK-NEXT: $rdi = MOV32ri64 0
; CHECK-NEXT: $eax = MOV32r0 implicit-def dead $eflags
; CHECK-NEXT: RET 0, $eax
bb.0.entry:
successors: %bb.1(0x40000000)
liveins: $edi
DBG_VALUE $edi, $noreg, !23, !DIExpression(), debug-location !100
renamable $ebx = COPY $edi
DBG_VALUE $ebx, $noreg, !21, !DIExpression(), debug-location !100
DBG_VALUE $bx, $noreg, !24, !DIExpression(), debug-location !100
renamable $cl = MOV8ri 1, debug-location !100
renamable $ch = COPY renamable $cl
DBG_VALUE $ecx, $noreg, !22, !DIExpression(), debug-location !100
JMP_1 %bb.1
bb.1.return:
liveins: $ebx, $ch
$rdi = MOV32ri64 0
$eax = MOV32r0 implicit-def dead $eflags
RET 0, $eax
...
|