1; RUN: opt -S -globalopt < %s | FileCheck %s 2source_filename = "test.c" 3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-apple-macosx10.12.0" 5 6%struct.mystruct = type { i32, i64 } 7; Generated at -Os from: 8; 9; static struct { int a; char b; } array[2]; 10; void __attribute__((nodebug)) foo(int in) { array[0].a = in; } 11; void __attribute__((nodebug)) bar(int in) { array[1].a = in; } 12; int main(int argc, char **argv) 13; { 14; foo(argv[0][1]); 15; bar(argv[0][1]); 16; return array[0].a + array[1].a; 17; } 18 19%struct.anon = type { i32, i8 } 20 21; This array is first split into two struct, which are then split into their 22; elements, of which only .a survives. 23@array = internal global [2 x %struct.anon] zeroinitializer, align 16, !dbg !0 24; CHECK: @array.0.0 = internal unnamed_addr global i32 0, align 16, !dbg ![[EL0:.*]] 25; CHECK: @array.1.0 = internal unnamed_addr global i32 0, align 8, !dbg ![[EL1:.*]] 26; 27; CHECK: ![[EL0]] = !DIGlobalVariableExpression(var: ![[VAR:.*]], expr: !DIExpression(DW_OP_LLVM_fragment, 0, 32)) 28; CHECK: ![[VAR]] = distinct !DIGlobalVariable(name: "array" 29; CHECK: ![[EL1]] = !DIGlobalVariableExpression(var: ![[VAR]], expr: !DIExpression(DW_OP_LLVM_fragment, 64, 32)) 30 31 32; Function Attrs: nounwind optsize ssp uwtable 33define void @foo(i32 %in) #0 { 34entry: 35 store i32 %in, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 0, i32 0), align 16, !tbaa !20 36 ret void 37} 38 39; Function Attrs: nounwind optsize ssp uwtable 40define void @bar(i32 %in) #0 { 41entry: 42 store i32 %in, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 1, i32 0), align 8, !tbaa !20 43 ret void 44} 45 46; Function Attrs: nounwind optsize ssp uwtable 47define i32 @main(i32 %argc, i8** %argv) #0 !dbg !25 { 48entry: 49 call void @llvm.dbg.value(metadata i32 %argc, metadata !31, metadata !33), !dbg !34 50 call void @llvm.dbg.value(metadata i8** %argv, metadata !32, metadata !33), !dbg !35 51 %0 = load i8*, i8** %argv, align 8, !dbg !36, !tbaa !37 52 %arrayidx1 = getelementptr inbounds i8, i8* %0, i64 1, !dbg !36 53 %1 = load i8, i8* %arrayidx1, align 1, !dbg !36, !tbaa !39 54 %conv = sext i8 %1 to i32, !dbg !36 55 call void @foo(i32 %conv) #2, !dbg !40 56 %2 = load i8*, i8** %argv, align 8, !dbg !41, !tbaa !37 57 %arrayidx3 = getelementptr inbounds i8, i8* %2, i64 1, !dbg !41 58 %3 = load i8, i8* %arrayidx3, align 1, !dbg !41, !tbaa !39 59 %conv4 = sext i8 %3 to i32, !dbg !41 60 call void @bar(i32 %conv4) #2, !dbg !42 61 %4 = load i32, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 0, i32 0), align 16, !dbg !43, !tbaa !20 62 %5 = load i32, i32* getelementptr inbounds ([2 x %struct.anon], [2 x %struct.anon]* @array, i64 0, i64 1, i32 0), align 8, !dbg !44, !tbaa !20 63 %add = add nsw i32 %4, %5, !dbg !45 64 ret i32 %add, !dbg !46 65} 66 67; Function Attrs: nounwind readnone speculatable 68declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 69 70; Function Attrs: nounwind readnone speculatable 71declare void @llvm.dbg.value(metadata, metadata, metadata) #1 72 73attributes #0 = { nounwind optsize ssp uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="penryn" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+sse4.1,+ssse3,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 74attributes #1 = { nounwind readnone speculatable } 75attributes #2 = { optsize } 76 77!llvm.dbg.cu = !{!2} 78!llvm.module.flags = !{!15, !16, !17, !18} 79!llvm.ident = !{!19} 80 81!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 82!1 = distinct !DIGlobalVariable(name: "array", scope: !2, file: !3, line: 1, type: !6, isLocal: true, isDefinition: true) 83!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0 (trunk 309960) (llvm/trunk 309961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 84!3 = !DIFile(filename: "test.c", directory: "/") 85!4 = !{} 86!5 = !{!0} 87!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 128, elements: !13) 88!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 64, elements: !8) 89!8 = !{!9, !11} 90!9 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !7, file: !3, line: 1, baseType: !10, size: 32) 91!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 92!11 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !7, file: !3, line: 1, baseType: !12, size: 8, offset: 32) 93!12 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 94!13 = !{!14} 95!14 = !DISubrange(count: 2) 96!15 = !{i32 2, !"Dwarf Version", i32 4} 97!16 = !{i32 2, !"Debug Info Version", i32 3} 98!17 = !{i32 1, !"wchar_size", i32 4} 99!18 = !{i32 7, !"PIC Level", i32 2} 100!19 = !{!"clang version 6.0.0 (trunk 309960) (llvm/trunk 309961)"} 101!20 = !{!21, !22, i64 0} 102!21 = !{!"", !22, i64 0, !23, i64 4} 103!22 = !{!"int", !23, i64 0} 104!23 = !{!"omnipotent char", !24, i64 0} 105!24 = !{!"Simple C/C++ TBAA"} 106!25 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !26, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !30) 107!26 = !DISubroutineType(types: !27) 108!27 = !{!10, !10, !28} 109!28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !29, size: 64) 110!29 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) 111!30 = !{!31, !32} 112!31 = !DILocalVariable(name: "argc", arg: 1, scope: !25, file: !3, line: 4, type: !10) 113!32 = !DILocalVariable(name: "argv", arg: 2, scope: !25, file: !3, line: 4, type: !28) 114!33 = !DIExpression() 115!34 = !DILocation(line: 4, column: 14, scope: !25) 116!35 = !DILocation(line: 4, column: 27, scope: !25) 117!36 = !DILocation(line: 6, column: 7, scope: !25) 118!37 = !{!38, !38, i64 0} 119!38 = !{!"any pointer", !23, i64 0} 120!39 = !{!23, !23, i64 0} 121!40 = !DILocation(line: 6, column: 3, scope: !25) 122!41 = !DILocation(line: 7, column: 7, scope: !25) 123!42 = !DILocation(line: 7, column: 3, scope: !25) 124!43 = !DILocation(line: 8, column: 19, scope: !25) 125!44 = !DILocation(line: 8, column: 32, scope: !25) 126!45 = !DILocation(line: 8, column: 21, scope: !25) 127!46 = !DILocation(line: 8, column: 3, scope: !25) 128