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