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