| # RUN: llc %s -mtriple=x86_64-unknown-unknown -o - -run-pass=livedebugvalues -experimental-debug-variable-locations=false | FileCheck %s --implicit-check-not=DBG_VALUE |
| # RUN: llc %s -mtriple=x86_64-unknown-unknown -o - -run-pass=livedebugvalues -experimental-debug-variable-locations=true | FileCheck %s -check-prefix=NEWLDV --implicit-check-not=DBG_VALUE |
| # |
| # Test that the DBG_VALUE of ecx below does not get propagated. It is considered |
| # live-in on LiveDebugValues' first pass through the loop, but on the second it |
| # should be removed from the InLocs set because it gets clobbered inside the |
| # loop. There should be no transfer from ecx to ebx -- this is ensured by the |
| # FileCheck implicit-check-not option. |
| # |
| # FIXME: we successfully prevent the false location (ebx) from being |
| # propagated into block 2, but the original transfer isn't yet eliminated. |
| # Thus we get no DBG_VALUe in block 2, but an invalid one in block 1. |
| # |
| # CHECK-LABEL: name: foo |
| # CHECK-LABEL: bb.0.entry: |
| # CHECK: $ecx = MOV32ri 0 |
| # CHECK-NEXT: DBG_VALUE |
| # CHECK-LABEL: bb.1.loop: |
| # CHECK: $ebx = COPY killed $ecx |
| # CHECK-NEXT: DBG_VALUE |
| # |
| # This doesn't occur under value-tracking LiveDebugValues though. |
| # |
| # NEWLDV-LABEL: name: foo |
| # NEWLDV-LABEL: bb.0.entry: |
| # NEWLDV: $ecx = MOV32ri 0 |
| # NEWLDV-NEXT: DBG_VALUE |
| |
| --- | |
| source_filename = "live-debug-values-remove-range.ll" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| define i32 @foo(i32 %bar) !dbg !4 { |
| entry: |
| br label %loop |
| loop: |
| br label %loop |
| exit: |
| ret i32 %bar |
| } |
| |
| !llvm.module.flags = !{!0, !1} |
| !llvm.dbg.cu = !{!2} |
| |
| !0 = !{i32 2, !"Debug Info Version", i32 3} |
| !1 = !{i32 2, !"Dwarf Version", i32 4} |
| !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) |
| !3 = !DIFile(filename: "bees.cpp", directory: ".") |
| !4 = distinct !DISubprogram(name: "nope", scope: !3, file: !3, line: 1, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{!7} |
| !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !8 = !{!9} |
| !9 = !DILocalVariable(name: "thin", scope: !4, file: !3, line: 1, type: !7) |
| !10 = !DILocation(line: 1, scope: !4) |
| |
| ... |
| --- |
| name: foo |
| alignment: 4 |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$edi' } |
| frameInfo: |
| stackSize: 8 |
| offsetAdjustment: -8 |
| maxAlignment: 1 |
| adjustsStack: true |
| hasCalls: true |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 8 |
| fixedStack: |
| - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$rbx' } |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| liveins: $edi, $rbx |
| |
| frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| CFI_INSTRUCTION offset $rbx, -16 |
| $ebx = MOV32rr $edi |
| $eax = MOV32ri 0, debug-location !10 |
| $ecx = MOV32ri 0, debug-location !10 |
| DBG_VALUE $ecx, $noreg, !9, !DIExpression(), debug-location !10 |
| $edi = MOV32ri 0, debug-location !10 |
| $esi = MOV32ri 0, debug-location !10 |
| |
| bb.1.loop: |
| successors: %bb.1, %bb.2 |
| liveins: $ebx, $eax, $ecx, $edi, $esi |
| |
| $eax = COPY $ecx, debug-location !10 |
| $ebx = COPY killed $ecx, debug-location !10 |
| $ecx = COPY killed $edi, debug-location !10 |
| $edi = COPY killed $esi, debug-location !10 |
| $esi = MOV32ri 1, debug-location !10 |
| TEST8ri killed renamable $al, 1, implicit-def $eflags |
| JCC_1 %bb.1, 5, implicit killed $eflags, debug-location !10 |
| |
| bb.2.exit: |
| liveins: $ebx |
| |
| $eax = MOV32rr killed $ebx, debug-location !10 |
| $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 8 |
| RET64 $eax, debug-location !10 |
| |
| ... |