sched-it-debug-nodes.mir
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# RUN: llc -mtriple thumbv7 -verify-machineinstrs -start-after if-converter -print-before post-RA-sched -print-after post-RA-sched %s -o /dev/null 2>&1 | FileCheck %s
--- |
; ModuleID = '/Volumes/Data/llvm/test/CodeGen/ARM/sched-it-debug-nodes.ll'
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv7"
%struct.s = type opaque
; Function Attrs: nounwind
define arm_aapcscc i32 @f(%struct.s* %s, i32 %u, i8* %b, i32 %n) #0 !dbg !4 {
entry:
tail call void @llvm.dbg.value(metadata %struct.s* %s, i64 0, metadata !18, metadata !27), !dbg !28
tail call void @llvm.dbg.value(metadata i32 %u, i64 0, metadata !19, metadata !27), !dbg !28
tail call void @llvm.dbg.value(metadata i8* %b, i64 0, metadata !20, metadata !27), !dbg !28
tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !21, metadata !27), !dbg !28
%cmp = icmp ult i32 %n, 4, !dbg !29
br i1 %cmp, label %return, label %if.end, !dbg !31
if.end: ; preds = %entry
tail call arm_aapcscc void @g(%struct.s* %s, i8* %b, i32 %n) #3, !dbg !32
br label %return, !dbg !33
return: ; preds = %if.end, %entry
%retval.0 = phi i32 [ 0, %if.end ], [ -1, %entry ]
ret i32 %retval.0, !dbg !34
}
; NOTE: This is checking that the register in the DEBUG_VALUE node is not
; accidentally being marked as KILL. The DBG_VALUE node gets introduced in
; If-Conversion, and gets bundled into the IT block. The Post RA Scheduler
; attempts to schedule the Machine Instr, and tries to tag the register in the
; debug value as KILL'ed, resulting in a DEBUG_VALUE node changing codegen! (or
; hopefully, triggering an assert).
; CHECK: BUNDLE implicit-def dead $itstate{{.*}} {
; CHECK: DBG_VALUE $r1, $noreg, !"u"
; CHECK-NOT: DBG_VALUE killed $r1, $noreg, !"u"
declare arm_aapcscc void @g(%struct.s*, i8*, i32) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!22, !23, !24, !25}
!llvm.ident = !{!26}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.7.0 (llvm/trunk 237059)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "<stdin>", directory: "/Users/compnerd/Source/llvm")
!2 = !{}
!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 9, type: !5, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !8, !11, !12, !16}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32)
!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "s", file: !1, line: 5, baseType: !10)
!10 = !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 5, flags: DIFlagFwdDecl)
!11 = !DIBasicType(name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 32, align: 32)
!13 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14)
!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint8_t", file: !1, line: 2, baseType: !15)
!15 = !DIBasicType(name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "size_t", file: !1, line: 3, baseType: !11)
!17 = !{!18, !19, !20, !21}
!18 = !DILocalVariable(name: "s", arg: 1, scope: !4, file: !1, line: 9, type: !8)
!19 = !DILocalVariable(name: "u", arg: 2, scope: !4, file: !1, line: 9, type: !11)
!20 = !DILocalVariable(name: "b", arg: 3, scope: !4, file: !1, line: 9, type: !12)
!21 = !DILocalVariable(name: "n", arg: 4, scope: !4, file: !1, line: 9, type: !16)
!22 = !{i32 2, !"Dwarf Version", i32 4}
!23 = !{i32 2, !"Debug Info Version", i32 3}
!24 = !{i32 1, !"wchar_size", i32 4}
!25 = !{i32 1, !"min_enum_size", i32 4}
!26 = !{!"clang version 3.7.0 (llvm/trunk 237059)"}
!27 = !DIExpression()
!28 = !DILocation(line: 9, scope: !4)
!29 = !DILocation(line: 10, scope: !30)
!30 = distinct !DILexicalBlock(scope: !4, file: !1, line: 10)
!31 = !DILocation(line: 10, scope: !4)
!32 = !DILocation(line: 13, scope: !4)
!33 = !DILocation(line: 14, scope: !4)
!34 = !DILocation(line: 15, scope: !4)
...
---
name: f
alignment: 2
exposesReturnsTwice: false
tracksRegLiveness: true
liveins:
- { reg: '$r0' }
- { reg: '$r1' }
- { reg: '$r2' }
- { reg: '$r3' }
calleeSavedRegisters: [ '$lr', '$d8', '$d9', '$d10', '$d11', '$d12', '$d13',
'$d14', '$d15', '$q4', '$q5', '$q6', '$q7', '$r4',
'$r5', '$r6', '$r7', '$r8', '$r9', '$r10', '$r11',
'$s16', '$s17', '$s18', '$s19', '$s20', '$s21',
'$s22', '$s23', '$s24', '$s25', '$s26', '$s27',
'$s28', '$s29', '$s30', '$s31', '$d8_d10', '$d9_d11',
'$d10_d12', '$d11_d13', '$d12_d14', '$d13_d15',
'$q4_q5', '$q5_q6', '$q6_q7', '$q4_q5_q6_q7', '$r4_r5',
'$r6_r7', '$r8_r9', '$r10_r11', '$d8_d9_d10', '$d9_d10_d11',
'$d10_d11_d12', '$d11_d12_d13', '$d12_d13_d14',
'$d13_d14_d15', '$d8_d10_d12', '$d9_d11_d13', '$d10_d12_d14',
'$d11_d13_d15', '$d8_d10_d12_d14', '$d9_d11_d13_d15',
'$d9_d10', '$d11_d12', '$d13_d14', '$d9_d10_d11_d12',
'$d11_d12_d13_d14' ]
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
stack:
- { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr', callee-saved-restored: false }
- { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r7' }
body: |
bb.0.entry:
liveins: $r0, $r1, $r2, $r3, $lr, $r7
DBG_VALUE $r0, $noreg, !18, !27, debug-location !28
DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
DBG_VALUE $r2, $noreg, !20, !27, debug-location !28
DBG_VALUE $r3, $noreg, !21, !27, debug-location !28
t2CMPri $r3, 4, 14, $noreg, implicit-def $cpsr, debug-location !31
DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
$r0 = t2MOVi -1, 3, $cpsr, $noreg, implicit undef $r0
DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
tBX_RET 3, $cpsr, implicit $r0, debug-location !34
$sp = frame-setup t2STMDB_UPD $sp, 14, $noreg, killed $r7, killed $lr
frame-setup CFI_INSTRUCTION def_cfa_offset 8
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r7, -8
DBG_VALUE $r0, $noreg, !18, !27, debug-location !28
DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
DBG_VALUE $r2, $noreg, !20, !27, debug-location !28
DBG_VALUE $r3, $noreg, !21, !27, debug-location !28
$r1 = tMOVr killed $r2, 14, $noreg, debug-location !32
$r2 = tMOVr killed $r3, 14, $noreg, debug-location !32
tBL 14, $noreg, @g, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit $r1, implicit $r2, implicit-def $sp, debug-location !32
$r0 = t2MOVi 0, 14, $noreg, $noreg
$sp = t2LDMIA_RET $sp, 14, $noreg, def $r7, def $pc, implicit $r0
...