1# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \ 2# RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues 3# 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. 9# 10--- | 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" 13 14 define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 { 15 entry: 16 ret i32 0 17 } 18 19 declare void @llvm.dbg.value(metadata, metadata, metadata) 20 21 !llvm.dbg.cu = !{!0} 22 !llvm.module.flags = !{!3, !4, !5} 23 !llvm.ident = !{!6} 24 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") 27 !2 = !{} 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} 31 !6 = !{!""} 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) 34 !9 = !{!10, !11, !11} 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) 40 41... 42--- 43name: foo 44alignment: 16 45tracksRegLiveness: true 46debugInstrRef: true 47frameInfo: 48 stackSize: 24 49 offsetAdjustment: -24 50 maxAlignment: 1 51 adjustsStack: true 52 hasCalls: true 53 maxCallFrameSize: 0 54 cvBytesOfCalleeSavedRegisters: 16 55stack: 56 - { id: 0, type: spill-slot, offset: -64, size: 8, alignment: 8 } 57machineFunctionInfo: {} 58body: | 59 bb.0.entry: 60 liveins: $rax, $rbx 61 62 DBG_VALUE $rax, $noreg, !12, !DIExpression(), debug-location !13 63 MOV64mr $rsp, 1, $noreg, -8, $noreg, renamable $rax :: (store 8 into %stack.0) 64 $rsp = MOV64rm $rsp, 1, $noreg, 0, $noreg, debug-location !13 :: (load 8 from %stack.0) 65 RET64 implicit $rbx, debug-location !13 66 67... 68