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
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.
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.
18 ## Capture variable num,
19 # CHECK: ![[VARNUM:[0-9]+]] = !DILocalVariable
21 ## There should be no variable location, just a single DBG_VALUE $noreg.
22 # CHECK: DBG_VALUE $noreg
25 # CHECK: DBG_VALUE $noreg
27 ## Test that if there's no limit, we _do_ get some locations.
28 # NOLIMIT: DBG_INSTR_REF 1, 0
29 # NOLIMIT-NEXT: DBG_VALUE $esi
31 # NOLIMIT: DBG_INSTR_REF 5,
32 # NOLIMIT-NEXT: DBG_VALUE $rsp
34 define i8 @test(i32 %bar) local_unnamed_addr !dbg !7 {
39 declare dso_local void @ext(i64)
42 !llvm.module.flags = !{!3, !4, !5, !6}
43 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
44 !1 = !DIFile(filename: "foo.cpp", directory: ".")
45 !2 = !DIBasicType(name: "int", size: 8, encoding: DW_ATE_signed)
46 !3 = !{i32 2, !"Dwarf Version", i32 4}
47 !4 = !{i32 2, !"Debug Info Version", i32 3}
48 !5 = !{i32 1, !"wchar_size", i32 2}
49 !6 = !{i32 7, !"PIC Level", i32 2}
50 !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
51 !8 = !DISubroutineType(types: !9)
54 !11 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 7, type: !2)
55 !12 = !DILocation(line: 10, scope: !7)
59 tracksRegLiveness: true
61 - { reg: '$rdi', virtual-reg: '' }
63 - { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
64 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
65 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
68 liveins: $rdi, $rax, $rbx
69 $eax = MOV32ri 0, debug-instr-number 1
71 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rdi :: (store 8 into %stack.0)
72 $rsi = MOV64rm $rsp, 1, $noreg, 8, $noreg :: (load 8 from %stack.0)
74 MOV64mr $rsp, 1, $noreg, 16, $noreg, $rbx :: (store 8 into %stack.0)
78 DBG_INSTR_REF 1, 0, !11, !DIExpression(), debug-location !12
79 ; This shouldn't find anything -- we have disabled tracking of spills.
81 ; In addition to plain spills, spills that are folded into instructions
82 ; shouldn't be tracked either.
83 INC32m $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, debug-instr-number 5, debug-location !12 :: (store (s32) into %stack.0)
86 DBG_INSTR_REF 5, 1000000, !11, !DIExpression(), debug-location !12
87 ; Shouldn't be able to find the reference to instr 5's memory operand.
89 RET64 $rsi, debug-location !12