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 deleted. This behaviour is tested 5# for DBG_VALUE users, and DBG_VALUE_LISTs that use the value multiple times. 6 7# CHECK-NOT: DBG_VALUE 8--- | 9 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 10 target triple = "x86_64-unknown-linux-gnu" 11 12 define dso_local void @main() local_unnamed_addr #0 !dbg !15 { 13 entry: 14 br label %L.outer 15 16 L: ; preds = %L, %L.outer 17 %tobool2.not = icmp eq i32 undef, 0 18 br i1 %tobool2.not, label %if.end4, label %L 19 20 if.end4: ; preds = %L 21 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 22 %cmp = icmp slt i32 %f.0.ph, undef 23 br i1 %cmp, label %if.then5, label %if.end6 24 25 if.then5: ; preds = %if.end4 26 call void @h() #2 27 br label %L.outer 28 29 L.outer: ; preds = %if.then5, %entry 30 %f.0.ph = phi i32 [ 0, %if.then5 ], [ 1, %entry ] 31 br label %L 32 33 if.end6: ; preds = %if.end4 34 ret void 35 } 36 37 declare dso_local void @h() local_unnamed_addr 38 39 declare void @llvm.dbg.value(metadata, metadata, metadata) 40 41 !llvm.dbg.cu = !{!0} 42 !llvm.module.flags = !{!13, !14} 43 44 !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) 45 !1 = !DIFile(filename: "tail-dup-debugvalue.c", directory: "/tmp") 46 !2 = !{} 47 !3 = !{!4, !7, !9, !11} 48 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) 49 !5 = distinct !DIGlobalVariable(name: "a", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 50 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 51 !7 = !DIGlobalVariableExpression(var: !8, expr: !DIExpression()) 52 !8 = distinct !DIGlobalVariable(name: "b", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 53 !9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) 54 !10 = distinct !DIGlobalVariable(name: "c", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 55 !11 = !DIGlobalVariableExpression(var: !12, expr: !DIExpression()) 56 !12 = distinct !DIGlobalVariable(name: "d", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) 57 !13 = !{i32 2, !"Debug Info Version", i32 3} 58 !14 = !{i32 7, !"uwtable", i32 1} 59 !15 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !18) 60 !16 = !DISubroutineType(types: !17) 61 !17 = !{!6} 62 !18 = !{!19, !20} 63 !19 = !DILocalVariable(name: "j", scope: !15, file: !1, line: 14, type: !6) 64 !20 = !DILocalVariable(name: "k", scope: !15, file: !1, line: 14, type: !6) 65 !21 = !DILocation(line: 0, scope: !15) 66 67... 68--- 69name: main 70alignment: 16 71tracksRegLiveness: true 72registers: 73 - { id: 0, class: gr32 } 74 - { id: 1, class: gr32 } 75 - { id: 2, class: gr32 } 76 - { id: 3, class: gr8 } 77 - { id: 4, class: gr32 } 78 - { id: 5, class: gr32 } 79 - { id: 6, class: gr32 } 80frameInfo: 81 maxAlignment: 1 82 hasCalls: true 83machineFunctionInfo: {} 84body: | 85 bb.0.entry: 86 successors: %bb.4(0x80000000) 87 88 %1:gr32 = MOV32ri 1 89 JMP_1 %bb.4 90 91 bb.1.L: 92 successors: %bb.2(0x04000000), %bb.1(0x7c000000) 93 94 %2:gr32 = MOV32r0 implicit-def dead $eflags 95 %3:gr8 = COPY %2.sub_8bit 96 TEST8rr %3, %3, implicit-def $eflags 97 JCC_1 %bb.1, 5, implicit $eflags 98 JMP_1 %bb.2 99 100 bb.2.if.end4: 101 successors: %bb.3(0x783e0f0f), %bb.5(0x07c1f0f1) 102 103 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 !21 104 DBG_VALUE %0, $noreg, !20, !DIExpression(), debug-location !21 105 %5:gr32 = IMPLICIT_DEF 106 %4:gr32 = SUB32rr %0, killed %5, implicit-def $eflags 107 JCC_1 %bb.5, 13, implicit $eflags 108 JMP_1 %bb.3 109 110 bb.3.if.then5: 111 successors: %bb.4(0x80000000) 112 113 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp 114 CALL64pcrel32 @h, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp 115 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp 116 %6:gr32 = MOV32r0 implicit-def dead $eflags 117 118 bb.4.L.outer: 119 successors: %bb.1(0x80000000) 120 121 %0:gr32 = PHI %1, %bb.0, %6, %bb.3 122 JMP_1 %bb.1 123 124 bb.5.if.end6: 125 RET 0 126 127... 128