1# RUN: llc -run-pass=early-tailduplication -mtriple=x86_64-unknown-linux-gnu %s -o - | FileCheck %s 2 3# Tail Duplication may update SSA values and invalidate any DBG_VALUEs that 4# use those values; those DBG_VALUEs should be set undef. This is tested 5# for DBG_VALUE users, and DBG_VALUE_LISTs that use the value multiple times. 6 7# CHECK: ![[VAR_J:[0-9]+]] = !DILocalVariable(name: "j" 8# CHECK: ![[VAR_K:[0-9]+]] = !DILocalVariable(name: "k" 9# CHECK-LABEL: bb.1.L: 10# CHECK: %[[REGISTER:[0-9]+]]:gr32 = PHI 11# CHECK-LABEL: bb.2.if.end4: 12# CHECK: DBG_VALUE_LIST ![[VAR_J]], 13# CHECK-SAME: %[[REGISTER]], 1, %[[REGISTER]] 14# CHECK: DBG_VALUE %[[REGISTER]], $noreg, ![[VAR_K]] 15 16--- | 17 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 18 target triple = "x86_64-unknown-linux-gnu" 19 20 define dso_local void @main() local_unnamed_addr #0 !dbg !15 { 21 entry: 22 br label %L.outer 23 24 L: ; preds = %L, %L.outer 25 %tobool2.not = icmp eq i32 undef, 0 26 br i1 %tobool2.not, label %if.end4, label %L 27 28 if.end4: ; preds = %L 29 call void @llvm.dbg.value(metadata !DIArgList(i32 %f.0.ph, i32 1, i32 %f.0.ph), metadata !19, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_and, DW_OP_or, DW_OP_stack_value)), !dbg !21 30 %cmp = icmp slt i32 %f.0.ph, undef 31 br i1 %cmp, label %if.then5, label %if.end6 32 33 if.then5: ; preds = %if.end4 34 call void @h() #2 35 br label %L.outer 36 37 L.outer: ; preds = %if.then5, %entry 38 %f.0.ph = phi i32 [ 0, %if.then5 ], [ 1, %entry ] 39 br label %L 40 41 if.end6: ; preds = %if.end4 42 ret void 43 } 44 45 declare dso_local void @h() local_unnamed_addr 46 47 declare void @llvm.dbg.value(metadata, metadata, metadata) 48 49 !llvm.dbg.cu = !{!0} 50 !llvm.module.flags = !{!13, !14} 51 52 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, splitDebugInlining: false, nameTableKind: None) 53 !1 = !DIFile(filename: "tail-dup-debugvalue.c", directory: "/tmp") 54 !2 = !{} 55 !3 = !{!4, !7, !9, !11} 56 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) 57 !5 = distinct !DIGlobalVariable(name: "a", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 58 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 59 !7 = !DIGlobalVariableExpression(var: !8, expr: !DIExpression()) 60 !8 = distinct !DIGlobalVariable(name: "b", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 61 !9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) 62 !10 = distinct !DIGlobalVariable(name: "c", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 63 !11 = !DIGlobalVariableExpression(var: !12, expr: !DIExpression()) 64 !12 = distinct !DIGlobalVariable(name: "d", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 65 !13 = !{i32 2, !"Debug Info Version", i32 3} 66 !14 = !{i32 7, !"uwtable", i32 1} 67 !15 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !18) 68 !16 = !DISubroutineType(types: !17) 69 !17 = !{!6} 70 !18 = !{!19, !20} 71 !19 = !DILocalVariable(name: "j", scope: !15, file: !1, line: 14, type: !6) 72 !20 = !DILocalVariable(name: "k", scope: !15, file: !1, line: 14, type: !6) 73 !21 = !DILocation(line: 0, scope: !15) 74 75... 76--- 77name: main 78alignment: 16 79tracksRegLiveness: true 80registers: 81 - { id: 0, class: gr32 } 82 - { id: 1, class: gr32 } 83 - { id: 2, class: gr32 } 84 - { id: 3, class: gr8 } 85 - { id: 4, class: gr32 } 86 - { id: 5, class: gr32 } 87 - { id: 6, class: gr32 } 88frameInfo: 89 maxAlignment: 1 90 hasCalls: true 91machineFunctionInfo: {} 92body: | 93 bb.0.entry: 94 successors: %bb.4(0x80000000) 95 96 %1:gr32 = MOV32ri 1 97 JMP_1 %bb.4 98 99 bb.1.L: 100 successors: %bb.2(0x04000000), %bb.1(0x7c000000) 101 102 %2:gr32 = MOV32r0 implicit-def dead $eflags 103 %3:gr8 = COPY %2.sub_8bit 104 TEST8rr %3, %3, implicit-def $eflags 105 JCC_1 %bb.1, 5, implicit $eflags 106 JMP_1 %bb.2 107 108 bb.2.if.end4: 109 successors: %bb.3(0x783e0f0f), %bb.5(0x07c1f0f1) 110 111 DBG_VALUE_LIST !19, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_and, DW_OP_or, DW_OP_stack_value), %0, 1, %0, debug-location !21 112 DBG_VALUE %0, $noreg, !20, !DIExpression(), debug-location !21 113 %5:gr32 = IMPLICIT_DEF 114 %4:gr32 = SUB32rr %0, killed %5, implicit-def $eflags 115 JCC_1 %bb.5, 13, implicit $eflags 116 JMP_1 %bb.3 117 118 bb.3.if.then5: 119 successors: %bb.4(0x80000000) 120 121 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp 122 CALL64pcrel32 @h, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp 123 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp 124 %6:gr32 = MOV32r0 implicit-def dead $eflags 125 126 bb.4.L.outer: 127 successors: %bb.1(0x80000000) 128 129 %0:gr32 = PHI %1, %bb.0, %6, %bb.3 130 JMP_1 %bb.1 131 132 bb.5.if.end6: 133 RET 0 134 135... 136