1 ; RUN: llc %s -stop-before expand-isel-pseudos -o - | FileCheck %s 2 3 ;-------------------------------------------------------------------- 4 ; This test case is basically generated from the following C code. 5 ; Compiled with "--target=x86_64-apple-darwin -S -g -O3" to get debug 6 ; info for optimized code. 7 ; 8 ; struct SS { 9 ; int a; 10 ; int b; 11 ; } S = { .a = 23, .b = -17 }; 12 ; 13 ; int test1() { 14 ; struct SS* foo1 = &S; 15 ; return (int)foo1; 16 ; } 17 ; 18 ; int test2() { 19 ; struct SS* foo2 = &S; 20 ; struct SS* bar2 = &S; 21 ; return (int)foo2 + (int)bar2; 22 ; } 23 ; 24 ; int test3() { 25 ; struct SS* bar3 = &S; 26 ; struct SS* foo3 = &S; 27 ; return (int)foo3 + (int)bar3; 28 ; } 29 ; 30 ; int test4() { 31 ; struct SS* foo4 = &S; 32 ; struct SS* bar4 = &S; 33 ; foo = 0; 34 ; return (int)foo4 + (int)bar4; 35 ; } 36 ; 37 ; int test5() { 38 ; struct SS* bar5 = &S; 39 ; struct SS* foo5 = &S; 40 ; foo5 = 0; 41 ; return (int)foo5 + (int)bar5; 42 ; } 43 ;-------------------------------------------------------------------- 44 45 ; CHECK: ![[FOO1:.*]] = !DILocalVariable(name: "foo1" 46 ; CHECK: ![[BAR1:.*]] = !DILocalVariable(name: "bar1" 47 ; CHECK: ![[FOO2:.*]] = !DILocalVariable(name: "foo2" 48 ; CHECK: ![[BAR2:.*]] = !DILocalVariable(name: "bar2" 49 ; CHECK: ![[FOO3:.*]] = !DILocalVariable(name: "bar3" 50 ; CHECK: ![[BAR3:.*]] = !DILocalVariable(name: "foo3" 51 ; CHECK: ![[FOO4:.*]] = !DILocalVariable(name: "foo4" 52 ; CHECK: ![[BAR4:.*]] = !DILocalVariable(name: "bar4" 53 ; CHECK: ![[BAR5:.*]] = !DILocalVariable(name: "bar5" 54 ; CHECK: ![[FOO5:.*]] = !DILocalVariable(name: "foo5" 55 56 57 source_filename = "sdag-dangling-dbgvalue.c" 58 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 59 target triple = "x86_64-apple-macosx10.4.0" 60 61 %struct.SS = type { i32, i32 } 62 63 @S = global %struct.SS { i32 23, i32 -17 }, align 4, !dbg !0 64 65 ; Verify that the def comes before the debug-use for foo1. 66 ; TODO: Currently dbg.value for bar1 is dropped(?), is that expected? 67 define i32 @test1() local_unnamed_addr #0 !dbg !17 { 68 ; CHECK-LABEL: bb.0.entry1 69 ; CHECK-NEXT: [[REG1:%[0-9]+]]:gr64 = 70 ; CHECK-NEXT: DBG_VALUE debug-use [[REG1]], debug-use $noreg, ![[FOO1]], !DIExpression() 71 entry1: 72 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !20, metadata !DIExpression()), !dbg !23 73 call void @llvm.dbg.value(metadata %struct.SS* null, metadata !22, metadata !DIExpression()), !dbg !24 74 ret i32 ptrtoint (%struct.SS* @S to i32), !dbg !25 75 } 76 77 ; Verify that the def comes before the debug-use for foo2 and bar2. 78 define i32 @test2() local_unnamed_addr #0 !dbg !26 { 79 ; CHECK-LABEL: bb.0.entry2 80 ; CHECK-NEXT: [[REG2:%[0-9]+]]:gr64 = 81 ; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, ![[FOO2]], !DIExpression() 82 ; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, ![[BAR2]], !DIExpression() 83 entry2: 84 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !28, metadata !DIExpression()), !dbg !30 85 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !29, metadata !DIExpression()), !dbg !31 86 ret i32 add (i32 ptrtoint (%struct.SS* @S to i32), i32 ptrtoint (%struct.SS* @S to i32)), !dbg !32 87 } 88 89 ; Verify that the def comes before the debug-use for foo3 and bar3. 90 define i32 @test3() local_unnamed_addr #0 !dbg !33 { 91 ; CHECK-LABEL: bb.0.entry3 92 ; CHECK-NEXT: [[REG3:%[0-9]+]]:gr64 = 93 ; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, ![[BAR3]], !DIExpression() 94 ; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, ![[FOO3]], !DIExpression() 95 entry3: 96 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !36, metadata !DIExpression()), !dbg !38 97 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !35, metadata !DIExpression()), !dbg !37 98 ret i32 add (i32 ptrtoint (%struct.SS* @S to i32), i32 ptrtoint (%struct.SS* @S to i32)), !dbg !39 99 } 100 101 ; Verify that the def comes before the debug-use for bar4. 102 ; TODO: Currently dbg.value for foo4 is dropped. It is set to null and not 103 ; used. Just like in test1 it can be discussed if there should be a 104 ; DBG_VALUE for foo4 here. 105 define i32 @test4() local_unnamed_addr #0 !dbg !40 { 106 ; CHECK-LABEL: bb.0.entry4 107 ; CHECK-NEXT: [[REG4:%[0-9]+]]:gr64 = 108 ; CHECK-NEXT: DBG_VALUE debug-use [[REG4]], debug-use $noreg, ![[BAR4]], !DIExpression() 109 entry4: 110 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !42, metadata !DIExpression()), !dbg !44 111 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !43, metadata !DIExpression()), !dbg !45 112 call void @llvm.dbg.value(metadata %struct.SS* null, metadata !42, metadata !DIExpression()), !dbg !44 113 ret i32 ptrtoint (%struct.SS* @S to i32), !dbg !46 114 } 115 116 ; Verify that we do not get a DBG_VALUE that maps foo5 to @S here. 117 ; TODO: foo5 is set to null, and it is not really used. Just like in test1 it 118 ; can be discussed if there should be a DBG_VALUE for foo5 here. 119 define i32 @test5() local_unnamed_addr #0 !dbg !47 { 120 ; CHECK-LABEL: bb.0.entry5: 121 ; CHECK-NEXT: [[REG5:%[0-9]+]]:gr64 = 122 ; CHECK-NEXT: DBG_VALUE debug-use [[REG5]], debug-use $noreg, ![[BAR5]], !DIExpression() 123 ; CHECK-NOT: DBG_VALUE debug-use [[REG5]], debug-use $noreg, ![[FOO5]], !DIExpression() 124 ; CHECK: RET 125 entry5: 126 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !49, metadata !DIExpression()), !dbg !51 127 call void @llvm.dbg.value(metadata %struct.SS* @S, metadata !50, metadata !DIExpression()), !dbg !52 128 call void @llvm.dbg.value(metadata %struct.SS* null, metadata !50, metadata !DIExpression()), !dbg !52 129 ret i32 ptrtoint (%struct.SS* @S to i32), !dbg !53 130 } 131 132 ; Function Attrs: nounwind readnone speculatable 133 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 134 135 attributes #0 = { nounwind readnone uwtable } 136 attributes #1 = { nounwind readnone speculatable } 137 138 !llvm.dbg.cu = !{!2} 139 !llvm.module.flags = !{!12, !13, !14, !15} 140 !llvm.ident = !{!16} 141 142 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 143 !1 = distinct !DIGlobalVariable(name: "S", scope: !2, file: !3, line: 4, type: !8, isLocal: false, isDefinition: true) 144 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (trunk 327229) (llvm/trunk 327239)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !7) 145 !3 = !DIFile(filename: "sdag-dangling-dbgvalue.c", directory: "/repo/uabbpet/llvm-master") 146 !4 = !{} 147 !5 = !{!6} 148 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 149 !7 = !{!0} 150 !8 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "SS", file: !3, line: 1, size: 64, elements: !9) 151 !9 = !{!10, !11} 152 !10 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !8, file: !3, line: 2, baseType: !6, size: 32) 153 !11 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !8, file: !3, line: 3, baseType: !6, size: 32, offset: 32) 154 !12 = !{i32 2, !"Dwarf Version", i32 2} 155 !13 = !{i32 2, !"Debug Info Version", i32 3} 156 !14 = !{i32 1, !"wchar_size", i32 4} 157 !15 = !{i32 7, !"PIC Level", i32 2} 158 !16 = !{!"clang version 7.0.0 (trunk 327229) (llvm/trunk 327239)"} 159 !17 = distinct !DISubprogram(name: "test1", scope: !3, file: !3, line: 6, type: !18, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: true, unit: !2, retainedNodes: !19) 160 !18 = !DISubroutineType(types: !5) 161 !19 = !{!20, !22} 162 !20 = !DILocalVariable(name: "foo1", scope: !17, file: !3, line: 7, type: !21) 163 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64) 164 !22 = !DILocalVariable(name: "bar1", scope: !17, file: !3, line: 8, type: !21) 165 !23 = !DILocation(line: 7, column: 14, scope: !17) 166 !24 = !DILocation(line: 8, column: 14, scope: !17) 167 !25 = !DILocation(line: 9, column: 3, scope: !17) 168 !26 = distinct !DISubprogram(name: "test2", scope: !3, file: !3, line: 12, type: !18, isLocal: false, isDefinition: true, scopeLine: 12, isOptimized: true, unit: !2, retainedNodes: !27) 169 !27 = !{!28, !29} 170 !28 = !DILocalVariable(name: "foo2", scope: !26, file: !3, line: 13, type: !21) 171 !29 = !DILocalVariable(name: "bar2", scope: !26, file: !3, line: 14, type: !21) 172 !30 = !DILocation(line: 13, column: 14, scope: !26) 173 !31 = !DILocation(line: 14, column: 14, scope: !26) 174 !32 = !DILocation(line: 15, column: 3, scope: !26) 175 !33 = distinct !DISubprogram(name: "test3", scope: !3, file: !3, line: 18, type: !18, isLocal: false, isDefinition: true, scopeLine: 18, isOptimized: true, unit: !2, retainedNodes: !34) 176 !34 = !{!35, !36} 177 !35 = !DILocalVariable(name: "bar3", scope: !33, file: !3, line: 19, type: !21) 178 !36 = !DILocalVariable(name: "foo3", scope: !33, file: !3, line: 20, type: !21) 179 !37 = !DILocation(line: 19, column: 14, scope: !33) 180 !38 = !DILocation(line: 20, column: 14, scope: !33) 181 !39 = !DILocation(line: 21, column: 3, scope: !33) 182 !40 = distinct !DISubprogram(name: "test4", scope: !3, file: !3, line: 24, type: !18, isLocal: false, isDefinition: true, scopeLine: 24, isOptimized: true, unit: !2, retainedNodes: !41) 183 !41 = !{!42, !43} 184 !42 = !DILocalVariable(name: "foo4", scope: !40, file: !3, line: 25, type: !21) 185 !43 = !DILocalVariable(name: "bar4", scope: !40, file: !3, line: 26, type: !21) 186 !44 = !DILocation(line: 25, column: 14, scope: !40) 187 !45 = !DILocation(line: 26, column: 14, scope: !40) 188 !46 = !DILocation(line: 28, column: 3, scope: !40) 189 !47 = distinct !DISubprogram(name: "test5", scope: !3, file: !3, line: 31, type: !18, isLocal: false, isDefinition: true, scopeLine: 31, isOptimized: true, unit: !2, retainedNodes: !48) 190 !48 = !{!49, !50} 191 !49 = !DILocalVariable(name: "bar5", scope: !47, file: !3, line: 32, type: !21) 192 !50 = !DILocalVariable(name: "foo5", scope: !47, file: !3, line: 33, type: !21) 193 !51 = !DILocation(line: 32, column: 14, scope: !47) 194 !52 = !DILocation(line: 33, column: 14, scope: !47) 195 !53 = !DILocation(line: 35, column: 3, scope: !47) 196
