1 # RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
2 # RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues
4 # Regression test for a rare crash with InstrRefBasedLDV. It would be quite
5 # wild for a transfer (copy/spill/restore) instruction to write to $rsp, but if
6 # it did, we hit a stale assertion that made assumptions about the numbering
7 # order of location numbers. Test that this input (transferring to $rsp via
8 # a stack restore) doesn't crash.
11 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-unknown-linux-gnu"
14 define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
19 declare void @llvm.dbg.value(metadata, metadata, metadata)
22 !llvm.module.flags = !{!3, !4, !5}
25 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
26 !1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
28 !3 = !{i32 7, !"Dwarf Version", i32 4}
29 !4 = !{i32 2, !"Debug Info Version", i32 3}
30 !5 = !{i32 1, !"wchar_size", i32 4}
32 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
33 !8 = !DISubroutineType(types: !9)
35 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
36 !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
37 !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
38 !13 = !DILocation(line: 0, scope: !7)
39 !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
45 tracksRegLiveness: true
53 cvBytesOfCalleeSavedRegisters: 16
55 - { id: 0, type: spill-slot, offset: -64, size: 8, alignment: 8 }
56 machineFunctionInfo: {}
61 DBG_VALUE $rax, $noreg, !12, !DIExpression(), debug-location !13
62 MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0)
63 $rsp = MOV64rm $rsp, 1, $noreg, 0, $noreg, debug-location !13 :: (load 8 from %stack.0)
64 RETQ implicit $rbx, debug-location !13