1; RUN: opt %s -sroa -verify -S -o - | FileCheck %s 2; 3; Test that we can partial emit debug info for aggregates repeatedly 4; split up by SROA. 5; 6; // Compile with -O1 7; typedef struct { 8; int a; 9; long int b; 10; } Inner; 11; 12; typedef struct { 13; Inner inner[2]; 14; } Outer; 15; 16; int foo(Outer outer) { 17; Inner i1 = outer.inner[1]; 18; return i1.a; 19; } 20; 21 22; Verify that SROA creates a variable piece when splitting i1. 23; CHECK: %[[I1:.*]] = alloca [12 x i8], align 4 24; CHECK: call void @llvm.dbg.declare(metadata [12 x i8]* %[[I1]], metadata ![[VAR:[0-9]+]], metadata ![[PIECE1:[0-9]+]]) 25; CHECK: call void @llvm.dbg.value(metadata i32 %[[A:.*]], i64 0, metadata ![[VAR]], metadata ![[PIECE2:[0-9]+]]) 26; CHECK: ret i32 %[[A]] 27; Read Var and Piece: 28; CHECK: ![[VAR]] = !DILocalVariable(name: "i1",{{.*}} line: 11, 29; CHECK: ![[PIECE1]] = !DIExpression(DW_OP_bit_piece, 32, 96) 30; CHECK: ![[PIECE2]] = !DIExpression(DW_OP_bit_piece, 0, 32) 31 32target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 33target triple = "x86_64-apple-macosx10.9.0" 34 35%struct.Outer = type { [2 x %struct.Inner] } 36%struct.Inner = type { i32, i64 } 37 38; Function Attrs: nounwind ssp uwtable 39define i32 @foo(%struct.Outer* byval align 8 %outer) #0 !dbg !4 { 40entry: 41 %i1 = alloca %struct.Inner, align 8 42 call void @llvm.dbg.declare(metadata %struct.Outer* %outer, metadata !25, metadata !2), !dbg !26 43 call void @llvm.dbg.declare(metadata %struct.Inner* %i1, metadata !27, metadata !2), !dbg !28 44 %inner = getelementptr inbounds %struct.Outer, %struct.Outer* %outer, i32 0, i32 0, !dbg !28 45 %arrayidx = getelementptr inbounds [2 x %struct.Inner], [2 x %struct.Inner]* %inner, i32 0, i64 1, !dbg !28 46 %0 = bitcast %struct.Inner* %i1 to i8*, !dbg !28 47 %1 = bitcast %struct.Inner* %arrayidx to i8*, !dbg !28 48 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 16, i32 8, i1 false), !dbg !28 49 %a = getelementptr inbounds %struct.Inner, %struct.Inner* %i1, i32 0, i32 0, !dbg !29 50 %2 = load i32, i32* %a, align 4, !dbg !29 51 ret i32 %2, !dbg !29 52} 53 54; Function Attrs: nounwind readnone 55declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 56 57; Function Attrs: nounwind 58declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2 59 60attributes #0 = { nounwind ssp uwtable } 61attributes #1 = { nounwind readnone } 62attributes #2 = { nounwind } 63 64!llvm.dbg.cu = !{!0} 65!llvm.module.flags = !{!22, !23} 66!llvm.ident = !{!24} 67 68!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !{}, retainedTypes: !{}, globals: !{}, imports: !{}) 69!1 = !DIFile(filename: "sroasplit-1.c", directory: "") 70!2 = !DIExpression() 71!4 = distinct !DISubprogram(name: "foo", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 10, file: !1, scope: !5, type: !6, variables: !{}) 72!5 = !DIFile(filename: "sroasplit-1.c", directory: "") 73!6 = !DISubroutineType(types: !7) 74!7 = !{!8, !9} 75!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 76!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "Outer", line: 8, file: !1, baseType: !10) 77!10 = !DICompositeType(tag: DW_TAG_structure_type, line: 6, size: 256, align: 64, file: !1, elements: !11) 78!11 = !{!12} 79!12 = !DIDerivedType(tag: DW_TAG_member, name: "inner", line: 7, size: 256, align: 64, file: !1, scope: !10, baseType: !13) 80!13 = !DICompositeType(tag: DW_TAG_array_type, size: 256, align: 64, baseType: !14, elements: !20) 81!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "Inner", line: 4, file: !1, baseType: !15) 82!15 = !DICompositeType(tag: DW_TAG_structure_type, line: 1, size: 128, align: 64, file: !1, elements: !16) 83!16 = !{!17, !18} 84!17 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !15, baseType: !8) 85!18 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 64, align: 64, offset: 64, file: !1, scope: !15, baseType: !19) 86!19 = !DIBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) 87!20 = !{!21} 88!21 = !DISubrange(count: 2) 89!22 = !{i32 2, !"Dwarf Version", i32 2} 90!23 = !{i32 1, !"Debug Info Version", i32 3} 91!24 = !{!"clang version 3.5.0 "} 92!25 = !DILocalVariable(name: "outer", line: 10, arg: 1, scope: !4, file: !5, type: !9) 93!26 = !DILocation(line: 10, scope: !4) 94!27 = !DILocalVariable(name: "i1", line: 11, scope: !4, file: !5, type: !14) 95!28 = !DILocation(line: 11, scope: !4) 96!29 = !DILocation(line: 12, scope: !4) 97