1 ; RUN: llc -start-after=codegenprepare -stop-before expand-isel-pseudos -o - %s | FileCheck %s 2 3 ; This test case was generated from the following debug.c program, 4 ; using: clang debug.c -g -O1 -S -o dbg_value_phi_isel1.ll -emit-llvm 5 ; -------------------------------------- 6 ; int end = 10; 7 ; 8 ; int main() { 9 ; int x = 9; 10 ; int y = 13; 11 ; for (int u = 0; u < end; ++u) { 12 ; x += y; 13 ; y = y * 3; 14 ; } 15 ; 16 ; volatile int arr[80]; 17 ; for (int q = 0; q < 64; ++q) { 18 ; arr[q] = q + 3; 19 ; } 20 ; 21 ; return x; 22 ; } 23 ; -------------------------------------- 24 ; 25 26 ; ModuleID = 'debug.c' 27 source_filename = "debug.c" 28 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 29 target triple = "x86_64-unknown-linux-gnu" 30 31 @end = dso_local local_unnamed_addr global i32 10, align 4, !dbg !0 32 33 ; Function Attrs: nounwind uwtable 34 define dso_local i32 @main() local_unnamed_addr #0 !dbg !11 { 35 ; CHECK-LABEL: name: main 36 entry: 37 %arr = alloca [80 x i32], align 16 38 call void @llvm.dbg.value(metadata i32 9, metadata !15, metadata !DIExpression()), !dbg !26 39 call void @llvm.dbg.value(metadata i32 13, metadata !16, metadata !DIExpression()), !dbg !27 40 call void @llvm.dbg.value(metadata i32 0, metadata !17, metadata !DIExpression()), !dbg !28 41 %0 = load i32, i32* @end, align 4, !dbg !29, !tbaa !31 42 %cmp20 = icmp sgt i32 %0, 0, !dbg !35 43 br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !36 44 45 for.body.lr.ph: ; preds = %entry 46 %1 = load i32, i32* @end, align 4, !tbaa !31 47 br label %for.body, !dbg !36 48 49 for.cond.cleanup: ; preds = %for.body, %entry 50 ; CHECK-LABEL: bb.{{.*}}.for.cond.cleanup: 51 ; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI 52 ; CHECK-NEXT: DBG_VALUE debug-use [[REG1]] 53 %x.0.lcssa = phi i32 [ 9, %entry ], [ %add, %for.body ] 54 call void @llvm.dbg.value(metadata i32 %x.0.lcssa, metadata !15, metadata !DIExpression()), !dbg !26 55 %2 = bitcast [80 x i32]* %arr to i8*, !dbg !37 56 call void @llvm.lifetime.start.p0i8(i64 320, i8* nonnull %2) #3, !dbg !37 57 call void @llvm.dbg.declare(metadata [80 x i32]* %arr, metadata !19, metadata !DIExpression()), !dbg !38 58 call void @llvm.dbg.value(metadata i32 0, metadata !24, metadata !DIExpression()), !dbg !39 59 br label %for.body4, !dbg !40 60 61 for.body: ; preds = %for.body.lr.ph, %for.body 62 ; CHECK-LABEL: bb.{{.*}}.for.body: 63 ; CHECK: [[REG2:%[0-9]+]]:gr32 = PHI 64 ; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI 65 ; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI 66 ; CHECK-NEXT: DBG_VALUE debug-use [[REG2]] 67 ; CHECK-NEXT: DBG_VALUE debug-use [[REG3]] 68 ; CHECK-NEXT: DBG_VALUE debug-use [[REG4]] 69 %u.023 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ] 70 %y.022 = phi i32 [ 13, %for.body.lr.ph ], [ %mul, %for.body ] 71 %x.021 = phi i32 [ 9, %for.body.lr.ph ], [ %add, %for.body ] 72 call void @llvm.dbg.value(metadata i32 %u.023, metadata !17, metadata !DIExpression()), !dbg !28 73 call void @llvm.dbg.value(metadata i32 %y.022, metadata !16, metadata !DIExpression()), !dbg !27 74 call void @llvm.dbg.value(metadata i32 %x.021, metadata !15, metadata !DIExpression()), !dbg !26 75 %add = add nuw nsw i32 %y.022, %x.021, !dbg !41 76 %mul = mul nsw i32 %y.022, 3, !dbg !43 77 %inc = add nuw nsw i32 %u.023, 1, !dbg !44 78 call void @llvm.dbg.value(metadata i32 %inc, metadata !17, metadata !DIExpression()), !dbg !28 79 call void @llvm.dbg.value(metadata i32 %mul, metadata !16, metadata !DIExpression()), !dbg !27 80 call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !26 81 %cmp = icmp slt i32 %inc, %1, !dbg !35 82 br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !36, !llvm.loop !45 83 84 for.cond.cleanup3: ; preds = %for.body4 85 call void @llvm.lifetime.end.p0i8(i64 320, i8* nonnull %2) #3, !dbg !47 86 ret i32 %x.0.lcssa, !dbg !48 87 88 for.body4: ; preds = %for.body4, %for.cond.cleanup 89 %indvars.iv = phi i64 [ 0, %for.cond.cleanup ], [ %indvars.iv.next, %for.body4 ] 90 call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !24, metadata !DIExpression()), !dbg !39 91 %arrayidx = getelementptr inbounds [80 x i32], [80 x i32]* %arr, i64 0, i64 %indvars.iv, !dbg !49 92 %3 = trunc i64 %indvars.iv to i32, !dbg !52 93 %4 = add i32 %3, 3, !dbg !52 94 store volatile i32 %4, i32* %arrayidx, align 4, !dbg !52, !tbaa !31 95 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !53 96 call void @llvm.dbg.value(metadata i32 undef, metadata !24, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !39 97 %exitcond = icmp eq i64 %indvars.iv.next, 64, !dbg !54 98 br i1 %exitcond, label %for.cond.cleanup3, label %for.body4, !dbg !40, !llvm.loop !55 99 } 100 101 ; Function Attrs: argmemonly nounwind 102 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 103 104 ; Function Attrs: nounwind readnone speculatable 105 declare void @llvm.dbg.declare(metadata, metadata, metadata) #2 106 107 ; Function Attrs: argmemonly nounwind 108 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 109 110 ; Function Attrs: nounwind readnone speculatable 111 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 112 113 attributes #0 = { nounwind uwtable } 114 attributes #1 = { argmemonly nounwind } 115 attributes #2 = { nounwind readnone speculatable } 116 attributes #3 = { nounwind } 117 118 !llvm.dbg.cu = !{!2} 119 !llvm.module.flags = !{!7, !8, !9} 120 !llvm.ident = !{!10} 121 122 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 123 !1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true) 124 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 125 !3 = !DIFile(filename: "debug.c", directory: "") 126 !4 = !{} 127 !5 = !{!0} 128 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 129 !7 = !{i32 2, !"Dwarf Version", i32 4} 130 !8 = !{i32 2, !"Debug Info Version", i32 3} 131 !9 = !{i32 1, !"wchar_size", i32 4} 132 !10 = !{!"clang version 7.0.0 (x)"} 133 !11 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !14) 134 !12 = !DISubroutineType(types: !13) 135 !13 = !{!6} 136 !14 = !{!15, !16, !17, !19, !24} 137 !15 = !DILocalVariable(name: "x", scope: !11, file: !3, line: 4, type: !6) 138 !16 = !DILocalVariable(name: "y", scope: !11, file: !3, line: 5, type: !6) 139 !17 = !DILocalVariable(name: "u", scope: !18, file: !3, line: 6, type: !6) 140 !18 = distinct !DILexicalBlock(scope: !11, file: !3, line: 6, column: 3) 141 !19 = !DILocalVariable(name: "arr", scope: !11, file: !3, line: 11, type: !20) 142 !20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, size: 2560, elements: !22) 143 !21 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6) 144 !22 = !{!23} 145 !23 = !DISubrange(count: 80) 146 !24 = !DILocalVariable(name: "q", scope: !25, file: !3, line: 12, type: !6) 147 !25 = distinct !DILexicalBlock(scope: !11, file: !3, line: 12, column: 3) 148 !26 = !DILocation(line: 4, column: 7, scope: !11) 149 !27 = !DILocation(line: 5, column: 7, scope: !11) 150 !28 = !DILocation(line: 6, column: 12, scope: !18) 151 !29 = !DILocation(line: 6, column: 23, scope: !30) 152 !30 = distinct !DILexicalBlock(scope: !18, file: !3, line: 6, column: 3) 153 !31 = !{!32, !32, i64 0} 154 !32 = !{!"int", !33, i64 0} 155 !33 = !{!"omnipotent char", !34, i64 0} 156 !34 = !{!"Simple C/C++ TBAA"} 157 !35 = !DILocation(line: 6, column: 21, scope: !30) 158 !36 = !DILocation(line: 6, column: 3, scope: !18) 159 !37 = !DILocation(line: 11, column: 3, scope: !11) 160 !38 = !DILocation(line: 11, column: 16, scope: !11) 161 !39 = !DILocation(line: 12, column: 12, scope: !25) 162 !40 = !DILocation(line: 12, column: 3, scope: !25) 163 !41 = !DILocation(line: 7, column: 7, scope: !42) 164 !42 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 33) 165 !43 = !DILocation(line: 8, column: 11, scope: !42) 166 !44 = !DILocation(line: 6, column: 28, scope: !30) 167 !45 = distinct !{!45, !36, !46} 168 !46 = !DILocation(line: 9, column: 3, scope: !18) 169 !47 = !DILocation(line: 17, column: 1, scope: !11) 170 !48 = !DILocation(line: 16, column: 3, scope: !11) 171 !49 = !DILocation(line: 13, column: 5, scope: !50) 172 !50 = distinct !DILexicalBlock(scope: !51, file: !3, line: 12, column: 32) 173 !51 = distinct !DILexicalBlock(scope: !25, file: !3, line: 12, column: 3) 174 !52 = !DILocation(line: 13, column: 12, scope: !50) 175 !53 = !DILocation(line: 12, column: 27, scope: !51) 176 !54 = !DILocation(line: 12, column: 21, scope: !51) 177 !55 = distinct !{!55, !40, !56} 178 !56 = !DILocation(line: 14, column: 3, scope: !25) 179
