1# RUN: llc -mtriple=x86_64-- -run-pass livedebugvalues -o - %s -experimental-debug-variable-locations=false | FileCheck %s --implicit-check-not=DBG_VALUE_LIST 2# 3# Test that even after a move, clobbering a register terminates a DBG_VALUE_LIST. 4# Check the same for DBG_VALUE $noreg. 5# 6# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c" 7# 8# CHECK-LABEL: bb.0.entry: 9# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 10# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi 11# CHECK: $rbx = COPY killed $rdi 12# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 13# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi 14# CHECK-LABEL: bb.1: 15# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 16# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi 17# CHECK: $rsi = MOV64ri 0 18# CHECK-LABEL: bb.2: 19# no live-in! 20# CHECK: $rsi = MOV64ri 0 21# CHECK-NEXT: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 22# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi 23# CHECK-LABEL: bb.3: 24# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 25# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi 26# live-in to bb.3, then explicitly undef'd, should be no further locations 27# propagated. 28# CHECK-LABEL: bb.4: 29--- | 30 ; ModuleID = 'test.cpp' 31 source_filename = "test.cpp" 32 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 33 target triple = "x86_64-unknown-linux-gnu" 34 35 ; Function Attrs: norecurse nounwind readnone uwtable 36 define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 { 37 entry: 38 ret i32 0, !dbg !17 39 } 40 41 ; Function Attrs: nounwind readnone speculatable willreturn 42 declare void @llvm.dbg.value(metadata, metadata, metadata) 43 44 !llvm.dbg.cu = !{!0} 45 !llvm.module.flags = !{!3, !4, !5} 46 !llvm.ident = !{!6} 47 48 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 49 !1 = !DIFile(filename: "test.cpp", directory: "/") 50 !2 = !{} 51 !3 = !{i32 7, !"Dwarf Version", i32 4} 52 !4 = !{i32 2, !"Debug Info Version", i32 3} 53 !5 = !{i32 1, !"wchar_size", i32 4} 54 !6 = !{!"clang version 11.0.0"} 55 !7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooii", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 56 !8 = !DISubroutineType(types: !9) 57 !9 = !{!10, !10, !10} 58 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 59 !11 = !{!12, !13, !14} 60 !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10) 61 !13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10) 62 !14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10) 63 !15 = !DILocation(line: 0, scope: !7) 64 !16 = !DILocation(line: 4, column: 12, scope: !7) 65 !17 = !DILocation(line: 4, column: 3, scope: !7) 66 67... 68--- 69name: _Z3fooii 70fixedStack: 71 - { id: 0, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default, 72 callee-saved-register: '$rbx', callee-saved-restored: true } 73 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, 74 callee-saved-register: '$rbp', callee-saved-restored: true } 75body: | 76 bb.0.entry: 77 liveins: $rdi, $rsi 78 79 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 80 $rbx = COPY killed $rdi 81 $rdi = MOV64ri 0 82 JMP_1 %bb.1 83 84 bb.1: 85 liveins: $rbx, $rsi 86 $rsi = MOV64ri 0 87 JMP_1 %bb.2 88 89 bb.2: 90 liveins: $rbx, $rsi 91 92 $rsi = MOV64ri 0 93 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rbx, $rsi, debug-location !15 94 JMP_1 %bb.3 95 96 bb.3: 97 liveins: $rbx, $rsi 98 DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15 99 JMP_1 %bb.4 100 101 bb.4: 102 liveins: $rbx, $rsi 103 RET64 $rbx, debug-location !17 104 105... 106 107