68 lines
2.5 KiB
Text
68 lines
2.5 KiB
Text
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# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
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# RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues
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#
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# Regression test for a rare crash with InstrRefBasedLDV. It would be quite
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# wild for a transfer (copy/spill/restore) instruction to write to $rsp, but if
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# it did, we hit a stale assertion that made assumptions about the numbering
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# order of location numbers. Test that this input (transferring to $rsp via
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# a stack restore) doesn't crash.
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#
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--- |
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
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entry:
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ret i32 0
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
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!2 = !{}
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!3 = !{i32 7, !"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 4}
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!6 = !{!""}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !11, !11}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
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!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
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...
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---
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name: foo
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alignment: 16
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tracksRegLiveness: true
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debugInstrRef: true
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frameInfo:
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stackSize: 24
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offsetAdjustment: -24
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maxAlignment: 1
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adjustsStack: true
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hasCalls: true
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maxCallFrameSize: 0
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cvBytesOfCalleeSavedRegisters: 16
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stack:
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- { id: 0, type: spill-slot, offset: -64, size: 8, alignment: 8 }
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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liveins: $rax, $rbx
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DBG_VALUE $rax, $noreg, !12, !DIExpression(), debug-location !13
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MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0)
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$rsp = MOV64rm $rsp, 1, $noreg, 0, $noreg, debug-location !13 :: (load 8 from %stack.0)
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RET64 implicit $rbx, debug-location !13
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...
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