# RUN: llc -O2 %s -start-after=arm-mve-vpt-opts -stop-after=arm-prera-ldst-opt -o - | FileCheck %s
# CHECK: DBG_VALUE 13, $noreg, !11, !DIExpression(), debug-location !13
# This test checks to make sure that a DBG_VALUE that uses an immediate doesn't get zero-ed out by a DBG_VALUE that comes later in the basic block, and describes the same variable.
--- |
; ModuleID = '/Users/shubham/Development/llvm-project/llvm/test/DebugInfo/Generic/incorrect-variable-debugloc1.ll'
source_filename = "/Users/shubham/Development/llvm-project/llvm/test/DebugInfo/Generic/incorrect-variable-debugloc1.ll"
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv8-unknown-linux"
; Function Attrs: uwtable
define i32 @main() !dbg !6 {
entry:
%c = alloca i32, align 4
tail call void @llvm.dbg.value(metadata i32 13, metadata !11, metadata !DIExpression()), !dbg !13
store volatile i32 13, ptr %c, align 4, !dbg !14
%call = tail call i32 @_Z4funcv(), !dbg !15
tail call void @llvm.dbg.value(metadata i32 %call, metadata !11, metadata !DIExpression()), !dbg !13
store volatile i32 %call, ptr %c, align 4, !dbg !15
tail call void @llvm.dbg.value(metadata ptr %c, metadata !11, metadata !DIExpression(DW_OP_deref)), !dbg !13
%c.0.c.0. = load volatile i32, ptr %c, align 4, !dbg !16
ret i32 %c.0.c.0., !dbg !16
}
declare i32 @_Z4funcv()
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.6.0 (trunk 223522)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "test.cpp", directory: "/home/kromanova/ngh/ToT_latest/llvm/test/DebugInfo")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 2}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{!"clang version 3.6.0 (trunk 223522)"}
!6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !7, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
!7 = !DISubroutineType(types: !8)
!8 = !{!9}
!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!10 = !{!11}
!11 = !DILocalVariable(name: "c", scope: !6, file: !1, line: 5, type: !12)
!12 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !9)
!13 = !DILocation(line: 5, column: 16, scope: !6)
!14 = !DILocation(line: 5, column: 3, scope: !6)
!15 = !DILocation(line: 6, column: 7, scope: !6)
!16 = !DILocation(line: 7, column: 3, scope: !6)
...
---
name: main
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHCatchret: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: false
failsVerification: false
tracksDebugUserValues: false
registers:
- { id: 0, class: gpr, preferred-register: '' }
- { id: 1, class: gpr, preferred-register: '' }
- { id: 2, class: gpr, preferred-register: '' }
liveins: []
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: true
hasCalls: true
stackProtector: ''
functionContext: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 4
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: c, type: default, offset: 0, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -4, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
DBG_VALUE 13, $noreg, !11, !DIExpression(), debug-location !13
%0:gpr = MOVi 13, 14 /* CC::al */, $noreg, $noreg
STRi12 killed %0, %stack.0.c, 0, 14 /* CC::al */, $noreg, debug-location !14 :: (volatile store (s32) into %ir.c)
ADJCALLSTACKDOWN 0, 0, 14 /* CC::al */, $noreg, implicit-def dead $sp, implicit $sp, debug-location !15
BL @_Z4funcv, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $r0, debug-location !15
ADJCALLSTACKUP 0, -1, 14 /* CC::al */, $noreg, implicit-def dead $sp, implicit $sp, debug-location !15
%1:gpr = COPY $r0, debug-location !15
DBG_VALUE %1, $noreg, !11, !DIExpression(), debug-location !13
STRi12 %1, %stack.0.c, 0, 14 /* CC::al */, $noreg, debug-location !15 :: (volatile store (s32) into %ir.c)
DBG_VALUE %stack.0.c, $noreg, !11, !DIExpression(DW_OP_deref), debug-location !13
%2:gpr = LDRi12 %stack.0.c, 0, 14 /* CC::al */, $noreg, debug-location !16 :: (volatile dereferenceable load (s32) from %ir.c)
$r0 = COPY %2, debug-location !16
BX_RET 14 /* CC::al */, $noreg, implicit $r0, debug-location !16
...
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