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|
# RUN: llc %s -run-pass=livedebugvalues -experimental-debug-variable-locations\
# RUN: -o - | FileCheck %s
#
# In the MIR below, there's an argument in the lowest byte of $edi. The debug
# intrinsics correctly identify the value and where it becomes the variables
# value, however a bug in InstrRefBasedLDV meant that not all subregisters of
# DBG_PHI operands are tracked. That leads to the wrong DBG_VALUE location
# being produced, and a crash under asan.
#
# CHECK-LABEL: name: foo
# CHECK: DBG_PHI $edi
# CHECK-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 0)
# CHECK-NEXT: DBG_VALUE_LIST {{.+}} $dil
--- |
; ModuleID = 'out.ll'
source_filename = "out.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-scei-ps4"
@someglobal = external local_unnamed_addr global i8, align 1
define hidden void @foo(i1 zeroext %bar) !dbg !7 {
entry:
ret void, !dbg !13
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!""}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !11, !11}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
!13 = !DILocation(line: 0, scope: !7)
...
---
name: foo
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
liveins:
- { reg: '$edi' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
debugValueSubstitutions:
- { srcinst: 2, srcop: 0, dstinst: 1, dstop: 0, subreg: 1 }
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $edi
DBG_PHI $edi, 1
DBG_INSTR_REF !12, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(2, 0), debug-location !13
renamable $rax = MOV64rm $rip, 1, $noreg, target-flags(x86-gotpcrel) @someglobal, $noreg, debug-location !13 :: (load (s64) from got)
MOV8mr killed renamable $rax, 1, $noreg, 0, $noreg, renamable $dil, debug-location !13 :: (store (s8) into @someglobal)
RET64 debug-location !13
...
|
