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_VALUE 5# 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_VALUE 9# 10# Test that spills of live values to the stack are NOT tracked by 11# 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 stack 13# 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 slot 16# limit is set to zero, meaning the spill shouldn't be tracked. 17# 18## Capture variable num, 19# CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable 20# 21## There should be no variable location, just a single DBG_VALUE $noreg. 22# CHECK: DBG_VALUE_LIST {{.+}} $noreg 23# 24## And then another. 25# CHECK: DBG_VALUE_LIST {{.+}} $noreg 26# 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 {{.+}} $esi 30# 31# NOLIMIT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(5, 32# NOLIMIT-NEXT: DBG_VALUE_LIST {{.+}} $rsp 33--- | 34 define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 { 35 entry: 36 ret i8 0, !dbg !12 37 } 38 39 declare dso_local void @ext(i64) 40 41 !llvm.dbg.cu = !{!0} 42 !llvm.module.flags = !{!3, !4, !5, !6} 43 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 44 !1 = !DIFile(filename: "foo.cpp", directory: ".") 45 !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed) 46 !3 = !{i32 2, !"Dwarf Version", i32 4} 47 !4 = !{i32 2, !"Debug Info Version", i32 3} 48 !5 = !{i32 1, !"wchar_size", i32 2} 49 !6 = !{i32 7, !"PIC Level", i32 2} 50 !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) 51 !8 = !DISubroutineType(types: !9) 52 !9 = !{!2, !2} 53 !10 = !{!11} 54 !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2) 55 !12 = !DILocation(line: 10, scope: !7) 56... 57--- 58name: test 59tracksRegLiveness: true 60debugInstrRef: true 61liveins: 62 - { reg: '$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, $rbx 70 $eax = MOV32ri 0, debug-instr-number 1 71 $edi = COPY $eax 72 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 0 77 $rdi = MOV64ri 0 78 79 DBG_INSTR_REF !11, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12 80 ; This shouldn't find anything -- we have disabled tracking of spills. 81 82 ; In addition to plain spills, spills that are folded into instructions 83 ; 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 !12 88 ; Shouldn't be able to find the reference to instr 5's memory operand. 89 90 RET64 $rsi, debug-location !12 91... 92