1; RUN: llc -O0 < %s | FileCheck %s --check-prefix=CHECK --check-prefix=DEBUG 2; RUN: llc < %s | FileCheck %s 3; RUN: llc -filetype=obj -O0 < %s | llvm-readobj --codeview - | FileCheck %s --check-prefix=OBJ 4 5; IR generated by the following source: 6; struct NonTrivial { 7; NonTrivial();// : x(42) {} 8; ~NonTrivial();// {} 9; int x; 10; }; 11; extern "C" void g(int);// {} 12; extern "C" void h(int);// {} 13; extern "C" void f(NonTrivial a, int b, int unused, int c) { 14; if (b) { 15; g(c); 16; } else { 17; h(a.x); 18; } 19; (void)unused; 20; } 21; //int main() { 22; // NonTrivial x; 23; // f(x, 1, 2, 3); 24; //} 25; 26; Remove C++ comments to have a complete, debuggable program. 27 28; We don't need (or want) DBG_VALUE instructions to describe the location of 29; inalloca arguments. We want frame indices in the side table, especially at 30; -O0, because they are reliable across the entire function and don't require 31; any propagation or analysis. 32 33; CHECK: _f: # @f 34; CHECK: Lfunc_begin0: 35; CHECK-NOT: DEBUG_VALUE 36; CHECK: [[start:Ltmp[0-9]+]]: 37; CHECK-NOT: DEBUG_VALUE 38; CHECK: cmpl 39; CHECK: calll _g 40; CHECK: calll _h 41; CHECK: jmp "??1NonTrivial@@QAE@XZ" 42; CHECK: [[end:Ltmp[0-9]+]]: 43; CHECK: Lfunc_end0: 44 45; FIXME: Optimized debug info should preserve this. 46; DEBUG: .short 4414 # Record kind: S_LOCAL 47; DEBUG: .asciz "a" 48; DEBUG: .cv_def_range [[start]] [[end]] 49 50; CHECK: .short 4414 # Record kind: S_LOCAL 51; CHECK: .asciz "b" 52; CHECK: .cv_def_range [[start]] [[end]] 53 54; CHECK: .short 4414 # Record kind: S_LOCAL 55; CHECK: .asciz "c" 56; CHECK: .cv_def_range [[start]] [[end]] 57 58; OBJ-LABEL: {{.*}}Proc{{.*}}Sym { 59; OBJ: Kind: S_GPROC32_ID (0x1147) 60; OBJ: DisplayName: f 61; OBJ: } 62; OBJ: FrameProcSym { 63; OBJ: Kind: S_FRAMEPROC (0x1012) 64; OBJ: TotalFrameBytes: 0x8 65; OBJ: LocalFramePtrReg: VFRAME (0x7536) 66; OBJ: ParamFramePtrReg: VFRAME (0x7536) 67; OBJ: } 68; OBJ: LocalSym { 69; OBJ: Kind: S_LOCAL (0x113E) 70; OBJ: Type: NonTrivial (0x{{.*}}) 71; OBJ: Flags [ (0x1) 72; OBJ: IsParameter (0x1) 73; OBJ: ] 74; OBJ: VarName: a 75; OBJ: } 76; OBJ: DefRangeFramePointerRelSym { 77; OBJ: Offset: 4 78; OBJ: } 79; OBJ: LocalSym { 80; OBJ: Type: int (0x74) 81; OBJ: Flags [ (0x1) 82; OBJ: IsParameter (0x1) 83; OBJ: ] 84; OBJ: VarName: b 85; OBJ: } 86; OBJ: DefRangeFramePointerRelSym { 87; OBJ: Offset: 8 88; OBJ: } 89; FIXME: Retain unused. 90; OBJ: LocalSym { 91; OBJ: Type: int (0x74) 92; OBJ: Flags [ (0x1) 93; OBJ: IsParameter (0x1) 94; OBJ: ] 95; OBJ: VarName: c 96; OBJ: } 97; OBJ: DefRangeFramePointerRelSym { 98; OBJ: Offset: 16 99; OBJ: } 100; OBJ-LABEL: ProcEnd { 101; OBJ: } 102 103 104; ModuleID = 't.cpp' 105source_filename = "t.cpp" 106target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 107target triple = "i386-pc-windows-msvc19.10.24728" 108 109%struct.NonTrivial = type { i32 } 110 111; Function Attrs: nounwind 112define void @f(<{ %struct.NonTrivial, i32, i32, i32 }>* inalloca) local_unnamed_addr #0 !dbg !7 { 113entry: 114 %a = getelementptr inbounds <{ %struct.NonTrivial, i32, i32, i32 }>, <{ %struct.NonTrivial, i32, i32, i32 }>* %0, i32 0, i32 0 115 %b = getelementptr inbounds <{ %struct.NonTrivial, i32, i32, i32 }>, <{ %struct.NonTrivial, i32, i32, i32 }>* %0, i32 0, i32 1 116 call void @llvm.dbg.declare(metadata i32* %b, metadata !22, metadata !24), !dbg !26 117 call void @llvm.dbg.declare(metadata %struct.NonTrivial* %a, metadata !23, metadata !24), !dbg !27 118 %1 = load i32, i32* %b, align 4, !dbg !28, !tbaa !30 119 %tobool = icmp eq i32 %1, 0, !dbg !28 120 br i1 %tobool, label %if.else, label %if.then, !dbg !34 121 122if.then: ; preds = %entry 123 %c = getelementptr inbounds <{ %struct.NonTrivial, i32, i32, i32 }>, <{ %struct.NonTrivial, i32, i32, i32 }>* %0, i32 0, i32 3 124 call void @llvm.dbg.declare(metadata i32* %c, metadata !20, metadata !24), !dbg !25 125 %2 = load i32, i32* %c, align 4, !dbg !35, !tbaa !30 126 tail call void @g(i32 %2) #4, !dbg !37 127 br label %if.end, !dbg !38 128 129if.else: ; preds = %entry 130 %x = getelementptr inbounds <{ %struct.NonTrivial, i32, i32, i32 }>, <{ %struct.NonTrivial, i32, i32, i32 }>* %0, i32 0, i32 0, i32 0, !dbg !39 131 %3 = load i32, i32* %x, align 4, !dbg !39, !tbaa !41 132 tail call void @h(i32 %3) #4, !dbg !43 133 br label %if.end 134 135if.end: ; preds = %if.else, %if.then 136 tail call x86_thiscallcc void @"\01??1NonTrivial@@QAE@XZ"(%struct.NonTrivial* nonnull %a) #4, !dbg !44 137 ret void, !dbg !44 138} 139 140; Function Attrs: nounwind readnone speculatable 141declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 142 143declare void @g(i32) local_unnamed_addr 144 145declare void @h(i32) local_unnamed_addr 146 147; Function Attrs: nounwind 148declare x86_thiscallcc void @"\01??1NonTrivial@@QAE@XZ"(%struct.NonTrivial*) unnamed_addr #3 149 150attributes #0 = { nounwind } 151attributes #1 = { nounwind readnone speculatable } 152attributes #3 = { nounwind } 153attributes #4 = { nounwind } 154 155!llvm.dbg.cu = !{!0} 156!llvm.module.flags = !{!3, !4, !5} 157!llvm.ident = !{!6} 158 159!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 160!1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "e41e3fda2a91b52e121ed6c29a209eae") 161!2 = !{} 162!3 = !{i32 1, !"NumRegisterParameters", i32 0} 163!4 = !{i32 2, !"CodeView", i32 1} 164!5 = !{i32 2, !"Debug Info Version", i32 3} 165!6 = !{!"clang version 5.0.0 "} 166!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 8, type: !8, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !19) 167!8 = !DISubroutineType(types: !9) 168!9 = !{null, !10, !13, !13, !13} 169!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "NonTrivial", file: !1, line: 1, size: 32, elements: !11, identifier: ".?AUNonTrivial@@") 170!11 = !{!12, !14, !18} 171!12 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !10, file: !1, line: 4, baseType: !13, size: 32) 172!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 173!14 = !DISubprogram(name: "NonTrivial", scope: !10, file: !1, line: 2, type: !15, isLocal: false, isDefinition: false, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true) 174!15 = !DISubroutineType(cc: DW_CC_BORLAND_thiscall, types: !16) 175!16 = !{null, !17} 176!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32, flags: DIFlagArtificial | DIFlagObjectPointer) 177!18 = !DISubprogram(name: "~NonTrivial", scope: !10, file: !1, line: 3, type: !15, isLocal: false, isDefinition: false, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true) 178!19 = !{!20, !21, !22, !23} 179!20 = !DILocalVariable(name: "c", arg: 4, scope: !7, file: !1, line: 8, type: !13) 180!21 = !DILocalVariable(name: "unused", arg: 3, scope: !7, file: !1, line: 8, type: !13) 181!22 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 8, type: !13) 182!23 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 8, type: !10) 183!24 = !DIExpression() 184!25 = !DILocation(line: 8, column: 56, scope: !7) 185!26 = !DILocation(line: 8, column: 37, scope: !7) 186!27 = !DILocation(line: 8, column: 30, scope: !7) 187!28 = !DILocation(line: 9, column: 7, scope: !29) 188!29 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 7) 189!30 = !{!31, !31, i64 0} 190!31 = !{!"int", !32, i64 0} 191!32 = !{!"omnipotent char", !33, i64 0} 192!33 = !{!"Simple C++ TBAA"} 193!34 = !DILocation(line: 9, column: 7, scope: !7) 194!35 = !DILocation(line: 10, column: 7, scope: !36) 195!36 = distinct !DILexicalBlock(scope: !29, file: !1, line: 9, column: 10) 196!37 = !DILocation(line: 10, column: 5, scope: !36) 197!38 = !DILocation(line: 11, column: 3, scope: !36) 198!39 = !DILocation(line: 12, column: 9, scope: !40) 199!40 = distinct !DILexicalBlock(scope: !29, file: !1, line: 11, column: 10) 200!41 = !{!42, !31, i64 0} 201!42 = !{!"?AUNonTrivial@@", !31, i64 0} 202!43 = !DILocation(line: 12, column: 5, scope: !40) 203!44 = !DILocation(line: 15, column: 1, scope: !7) 204