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1# RUN: llc %s -o - -experimental-debug-variable-locations \2# RUN: -mtriple=x86_64-unknown-unknown \3# RUN: -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=0 | \4# RUN: FileCheck %s --implicit-check-not=DBG_VALUE5# RUN: llc %s -o - -experimental-debug-variable-locations \6# RUN: -mtriple=x86_64-unknown-unknown \7# RUN: -run-pass=livedebugvalues -livedebugvalues-max-stack-slots=100 | \8# RUN: FileCheck %s --check-prefixes=NOLIMIT --implicit-check-not=DBG_VALUE9#10# Test that spills of live values to the stack are NOT tracked by11# LiveDebugValues if an internal accounting limit is exceeded -- in this test,12# set to zero. This is to avoid scenarios where we track thousands of stack13# slots, which can show up with autogenerated code and/or asan.14#15# This is a copy of livedebugvalues_stackslot_subregs.mir, here the stack slot16# limit is set to zero, meaning the spill shouldn't be tracked.17#18## Capture variable num,19# CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable20#21## There should be no variable location, just a single DBG_VALUE $noreg.22# CHECK: DBG_VALUE_LIST {{.+}} $noreg23#24## And then another.25# CHECK: DBG_VALUE_LIST {{.+}} $noreg26#27## Test that if there's no limit, we _do_ get some locations.28# NOLIMIT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)29# NOLIMIT-NEXT: DBG_VALUE_LIST {{.+}} $esi30#31# NOLIMIT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(5,32# NOLIMIT-NEXT: DBG_VALUE_LIST {{.+}} $rsp33--- |34 define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 {35 entry:36 ret i8 0, !dbg !1237 }38 39 declare dso_local void @ext(i64)40 41 !llvm.dbg.cu = !{!0}42 !llvm.module.flags = !{!3, !4, !5, !6}43 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)44 !1 = !DIFile(filename: "foo.cpp", directory: ".")45 !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)46 !3 = !{i32 2, !"Dwarf Version", i32 4}47 !4 = !{i32 2, !"Debug Info Version", i32 3}48 !5 = !{i32 1, !"wchar_size", i32 2}49 !6 = !{i32 7, !"PIC Level", i32 2}50 !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)51 !8 = !DISubroutineType(types: !9)52 !9 = !{!2, !2}53 !10 = !{!11}54 !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2)55 !12 = !DILocation(line: 10, scope: !7)56...57---58name: test59tracksRegLiveness: true60debugInstrRef: true61liveins:62 - { reg: '$rdi', virtual-reg: '' }63stack:64 - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,65 stack-id: default, callee-saved-register: '', callee-saved-restored: true,66 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }67body: |68 bb.0:69 liveins: $rdi, $rax, $rbx70 $eax = MOV32ri 0, debug-instr-number 171 $edi = COPY $eax72 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0)73 $rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0)74 75 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0)76 $rax = MOV64ri 077 $rdi = MOV64ri 078 79 DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !1280 ; This shouldn't find anything -- we have disabled tracking of spills.81 82 ; In addition to plain spills, spills that are folded into instructions83 ; shouldn't be tracked either.84 INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 5, debug-location !12 :: (store (s32) into %stack.0)85 86 87 DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(5, 1000000), debug-location !1288 ; Shouldn't be able to find the reference to instr 5's memory operand.89 90 RET64 $rsi, debug-location !1291...92