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 a series of joins, where: 4# * The locations agree, although registers have changed, 5# * A register down one of the predecessors has been def'd, 6# * The register operands to DBG_VALUE_LIST have been swapped, 7# * A spurious additional operand has been added to one path, 8# * The expressions are not the same (plus -> minus). 9# 10# Each join block below checks for one DBG_VALUE_LIST: either we re-state the var 11# location in a block for the next test, or it's created as a live-in and we 12# use that for the next test. Two DBG_VALUE_LISTs in a block would represent 13# a live-in that we didn't expect, and a test failure. 14# 15# Each conditional block should have at least one, possibly two. 16# 17# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c" 18# 19# CHECK-LABEL: bb.0.entry: 20# CHECK: DBG_VALUE_LIST ![[VAR]], 21# CHECK-LABEL: bb.1: 22# CHECK: DBG_VALUE_LIST ![[VAR]], 23# CHECK: DBG_VALUE_LIST ![[VAR]], 24# CHECK-LABEL: bb.2: 25# CHECK: DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0, 26# CHECK-SAME: DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi 27# CHECK-LABEL: bb.3: 28# CHECK: DBG_VALUE_LIST ![[VAR]], 29# CHECK-LABEL: bb.4: 30# CHECK: DBG_VALUE_LIST ![[VAR]], 31# CHECK-SAME: $rdi, $rsi 32# CHECK-LABEL: bb.5: 33# CHECK: DBG_VALUE_LIST ![[VAR]], 34# CHECK: DBG_VALUE_LIST ![[VAR]], 35# CHECK-SAME: $rsi, $rdi 36# CHECK-LABEL: bb.6: 37# CHECK: DBG_VALUE_LIST ![[VAR]], 38# CHECK-LABEL: bb.7: 39# CHECK: DBG_VALUE_LIST ![[VAR]], 40# CHECK: DBG_VALUE_LIST ![[VAR]], 41# CHECK-SAME: $rdi, $rsi, $rax 42# CHECK-LABEL: bb.8: 43# CHECK: DBG_VALUE_LIST ![[VAR]], 44# CHECK-LABEL: bb.9: 45# CHECK: DBG_VALUE_LIST ![[VAR]], 46# CHECK: DBG_VALUE_LIST ![[VAR]], 47# CHECK-SAME: DW_OP_minus 48# CHECK-LABEL: bb.10: 49--- | 50 ; ModuleID = 'test.cpp' 51 source_filename = "test.cpp" 52 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 53 target triple = "x86_64-unknown-linux-gnu" 54 55 ; Function Attrs: norecurse nounwind readnone uwtable 56 define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 { 57 entry: 58 ret i32 0, !dbg !17 59 } 60 61 ; Function Attrs: nounwind readnone speculatable willreturn 62 declare void @llvm.dbg.value(metadata, metadata, metadata) 63 64 !llvm.dbg.cu = !{!0} 65 !llvm.module.flags = !{!3, !4, !5} 66 !llvm.ident = !{!6} 67 68 !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) 69 !1 = !DIFile(filename: "test.cpp", directory: "/") 70 !2 = !{} 71 !3 = !{i32 7, !"Dwarf Version", i32 4} 72 !4 = !{i32 2, !"Debug Info Version", i32 3} 73 !5 = !{i32 1, !"wchar_size", i32 4} 74 !6 = !{!"clang version 11.0.0"} 75 !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) 76 !8 = !DISubroutineType(types: !9) 77 !9 = !{!10, !10, !10} 78 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 79 !11 = !{!12, !13, !14} 80 !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10) 81 !13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10) 82 !14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10) 83 !15 = !DILocation(line: 0, scope: !7) 84 !16 = !DILocation(line: 4, column: 12, scope: !7) 85 !17 = !DILocation(line: 4, column: 3, scope: !7) 86 87... 88--- 89name: _Z3fooii 90body: | 91 bb.0.entry: 92 liveins: $rdi, $rsi 93 94 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 95 CMP64ri8 $rdi, 0, implicit-def $eflags 96 JCC_1 %bb.2, 4, implicit $eflags 97 98 bb.1: 99 liveins: $rdi, $rsi 100 $rdi = MOV64ri 0 101 $rsi = MOV64ri 0 102 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 103 104 bb.2: 105 liveins: $rdi, $rsi 106 ; Should be a live-in loc here, 107 CMP64ri8 $rdi, 0, implicit-def $eflags 108 JCC_1 %bb.4, 4, implicit $eflags 109 110 bb.3: 111 liveins: $rdi, $rsi 112 $rsi = MOV64ri 0 113 114 bb.4: 115 liveins: $rdi, $rsi 116 ; Should _not_ be a live-in loc here. 117 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 118 CMP64ri8 $rdi, 0, implicit-def $eflags 119 JCC_1 %bb.6, 4, implicit $eflags 120 121 bb.5: 122 liveins: $rdi, $rsi 123 ; Flip some args, 124 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rsi, $rdi, debug-location !15 125 126 bb.6: 127 liveins: $rdi, $rsi 128 ; Should _not_ be a live-in loc here. 129 $rax = MOV64ri 0 130 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 131 CMP64ri8 $rdi, 0, implicit-def $eflags 132 JCC_1 %bb.8, 4, implicit $eflags 133 134 bb.7: 135 liveins: $rdi, $rsi 136 ; Add an extra, spurious, unused argument 137 $rax = MOV64ri 1 138 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, $rax, debug-location !15 139 140 bb.8: 141 liveins: $rdi, $rsi 142 ; Should _not_ be a live-in loc here. 143 $rax = MOV64ri 0 144 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15 145 CMP64ri8 $rdi, 0, implicit-def $eflags 146 JCC_1 %bb.10, 4, implicit $eflags 147 148 bb.9: 149 liveins: $rdi, $rsi 150 ; Replace add with sub in the expr 151 $rax = MOV64ri 1 152 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_minus), $rdi, $rsi, debug-location !15 153 154 bb.10: 155 liveins: $rdi, $rsi 156 ; Should _not_ be a live-in loc here. 157 RET64 158 159... 160 161