# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN: -mtriple=x86_64-unknown-unknown \
# RUN: -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=0 | \
# RUN: FileCheck %s --implicit-check-not=DBG_VALUE
# RUN: llc %s -o - -experimental-debug-variable-locations \
# RUN: -mtriple=x86_64-unknown-unknown \
# RUN: -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=100 | \
# RUN: FileCheck %s --check-prefixes=NOLIMIT --implicit-check-not=DBG_VALUE
#
# Test that spills of live values to the stack are NOT tracked by
# LiveDebugValues if an internal accounting limit is exceeded -- in this test,
# set to zero. This is to avoid scenarios where we track thousands of stack
# slots, which can show up with autogenerated code and/or asan.
#
# This is a copy of livedebugvalues_stackslot_subregs.mir, here the stack slot
# limit is set to zero, meaning the spill shouldn't be tracked.
#
## Capture variable num,
# CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable
#
## There should be no variable location, just a single DBG_VALUE $noreg.
# CHECK: DBG_VALUE_LIST {{.+}} $noreg
#
## And then another.
# CHECK: DBG_VALUE_LIST {{.+}} $noreg
#
## Test that if there's no limit, we _do_ get some locations.
# NOLIMIT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
# NOLIMIT-NEXT: DBG_VALUE_LIST {{.+}} $esi
#
# NOLIMIT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(5,
# NOLIMIT-NEXT: DBG_VALUE_LIST {{.+}} $rsp
--- |
define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 {
entry:
ret i8 0, !dbg !12
}
declare dso_local void @ext(i64)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
!1 = !DIFile(filename: "foo.cpp", directory: ".")
!2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
!8 = !DISubroutineType(types: !9)
!9 = !{!2, !2}
!10 = !{!11}
!11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2)
!12 = !DILocation(line: 10, scope: !7)
...
---
name: test
tracksRegLiveness: true
debugInstrRef: true
liveins:
- { reg: '$rdi', virtual-reg: '' }
stack:
- { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
body: |
bb.0:
liveins: $rdi, $rax, $rbx
$eax = MOV32ri 0, debug-instr-number 1
$edi = COPY $eax
MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0)
$rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0)
MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0)
$rax = MOV64ri 0
$rdi = MOV64ri 0
DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12
; This shouldn't find anything -- we have disabled tracking of spills.
; In addition to plain spills, spills that are folded into instructions
; shouldn't be tracked either.
INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 5, debug-location !12 :: (store (s32) into %stack.0)
DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(5, 1000000), debug-location !12
; Shouldn't be able to find the reference to instr 5's memory operand.
RET64 $rsi, debug-location !12
...
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