1; RUN: opt %s -passes='sroa,verify' -S -o - | FileCheck %s 2; RUN: opt --try-experimental-debuginfo-iterators %s -passes='sroa,verify' -S -o - | FileCheck %s 3; 4; Test that we can partial emit debug info for aggregates repeatedly 5; split up by SROA. 6; 7; // Compile with -O1 8; typedef struct { 9; int a; 10; long int b; 11; } Inner; 12; 13; typedef struct { 14; Inner inner[2]; 15; } Outer; 16; 17; int foo(Outer outer) { 18; Inner i1 = outer.inner[1]; 19; return i1.a; 20; } 21; 22 23; Verify that SROA creates a variable piece when splitting i1. 24; CHECK: %[[I1:.*]] = alloca [12 x i8], align 4 25; CHECK: #dbg_declare(ptr %[[I1]], ![[VAR:[0-9]+]], !DIExpression(DW_OP_LLVM_fragment, 32, 96), 26; CHECK: #dbg_value(i32 %[[A:.*]], ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 0, 32), 27; CHECK: ret i32 %[[A]] 28; Read Var and Piece: 29; CHECK: ![[VAR]] = !DILocalVariable(name: "i1",{{.*}} line: 11, 30 31target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 32target triple = "x86_64-apple-macosx10.9.0" 33 34%struct.Outer = type { [2 x %struct.Inner] } 35%struct.Inner = type { i32, i64 } 36 37; Function Attrs: nounwind ssp uwtable 38define i32 @foo(ptr byval(%struct.Outer) align 8 %outer) #0 !dbg !4 { 39entry: 40 %i1 = alloca %struct.Inner, align 8 41 call void @llvm.dbg.declare(metadata ptr %outer, metadata !25, metadata !2), !dbg !26 42 call void @llvm.dbg.declare(metadata ptr %i1, metadata !27, metadata !2), !dbg !28 43 %arrayidx = getelementptr inbounds [2 x %struct.Inner], ptr %outer, i32 0, i64 1, !dbg !28 44 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %i1, ptr align 8 %arrayidx, i64 16, i1 false), !dbg !28 45 %0 = load i32, ptr %i1, align 4, !dbg !29 46 ret i32 %0, !dbg !29 47} 48 49; Function Attrs: nounwind readnone 50declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 51 52; Function Attrs: nounwind 53declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1) #2 54 55attributes #0 = { nounwind ssp uwtable } 56attributes #1 = { nounwind readnone } 57attributes #2 = { nounwind } 58 59!llvm.dbg.cu = !{!0} 60!llvm.module.flags = !{!22, !23} 61!llvm.ident = !{!24} 62 63!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !{}, retainedTypes: !{}, globals: !{}, imports: !{}) 64!1 = !DIFile(filename: "sroasplit-1.c", directory: "") 65!2 = !DIExpression() 66!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, retainedNodes: !{}) 67!5 = !DIFile(filename: "sroasplit-1.c", directory: "") 68!6 = !DISubroutineType(types: !7) 69!7 = !{!8, !9} 70!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 71!9 = !DIDerivedType(tag: DW_TAG_typedef, name: "Outer", line: 8, file: !1, baseType: !10) 72!10 = !DICompositeType(tag: DW_TAG_structure_type, line: 6, size: 256, align: 64, file: !1, elements: !11) 73!11 = !{!12} 74!12 = !DIDerivedType(tag: DW_TAG_member, name: "inner", line: 7, size: 256, align: 64, file: !1, scope: !10, baseType: !13) 75!13 = !DICompositeType(tag: DW_TAG_array_type, size: 256, align: 64, baseType: !14, elements: !20) 76!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "Inner", line: 4, file: !1, baseType: !15) 77!15 = !DICompositeType(tag: DW_TAG_structure_type, line: 1, size: 128, align: 64, file: !1, elements: !16) 78!16 = !{!17, !18} 79!17 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !15, baseType: !8) 80!18 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 64, align: 64, offset: 64, file: !1, scope: !15, baseType: !19) 81!19 = !DIBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) 82!20 = !{!21} 83!21 = !DISubrange(count: 2) 84!22 = !{i32 2, !"Dwarf Version", i32 2} 85!23 = !{i32 1, !"Debug Info Version", i32 3} 86!24 = !{!"clang version 3.5.0 "} 87!25 = !DILocalVariable(name: "outer", line: 10, arg: 1, scope: !4, file: !5, type: !9) 88!26 = !DILocation(line: 10, scope: !4) 89!27 = !DILocalVariable(name: "i1", line: 11, scope: !4, file: !5, type: !14) 90!28 = !DILocation(line: 11, scope: !4) 91!29 = !DILocation(line: 12, scope: !4) 92