1; RUN: opt %s -sroa -verify -S -o - | FileCheck %s 2; From: 3; struct prog_src_register { 4; unsigned : 4; 5; int Index : 12 + 1; 6; unsigned : 12; 7; unsigned : 4; 8; int : 12 + 1 9; } src_reg_for_float() { 10; struct prog_src_register a; 11; memset(&a, 0, sizeof(a)); 12; int local = a.Index; 13; return a; 14; } 15; ModuleID = 'pr22495.c' 16target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 17target triple = "x86_64-unknown-linux-gnu" 18 19; When SROA is creating new smaller allocas, it may add padding. 20; 21; There should be no debug info for the padding. 22; CHECK-NOT: DW_OP_bit_piece, 56 23; CHECK: DIExpression(DW_OP_bit_piece, 32, 24) 24; CHECK-NOT: DW_OP_bit_piece, 56 25; CHECK: DIExpression(DW_OP_bit_piece, 0, 32) 26; CHECK-NOT: DW_OP_bit_piece, 56 27%struct.prog_src_register = type { i32, i24 } 28 29; Function Attrs: nounwind 30define i64 @src_reg_for_float() #0 !dbg !4 { 31entry: 32 %retval = alloca %struct.prog_src_register, align 4 33 %a = alloca %struct.prog_src_register, align 4 34 %local = alloca i32, align 4 35 call void @llvm.dbg.declare(metadata %struct.prog_src_register* %a, metadata !16, metadata !17), !dbg !18 36 %0 = bitcast %struct.prog_src_register* %a to i8*, !dbg !19 37 call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 8, i32 4, i1 false), !dbg !19 38 call void @llvm.dbg.declare(metadata i32* %local, metadata !20, metadata !17), !dbg !21 39 %1 = bitcast %struct.prog_src_register* %a to i32*, !dbg !21 40 %bf.load = load i32, i32* %1, align 4, !dbg !21 41 %bf.shl = shl i32 %bf.load, 15, !dbg !21 42 %bf.ashr = ashr i32 %bf.shl, 19, !dbg !21 43 store i32 %bf.ashr, i32* %local, align 4, !dbg !21 44 %2 = bitcast %struct.prog_src_register* %retval to i8*, !dbg !22 45 %3 = bitcast %struct.prog_src_register* %a to i8*, !dbg !22 46 call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 8, i32 4, i1 false), !dbg !22 47 %4 = bitcast %struct.prog_src_register* %retval to i64*, !dbg !22 48 %5 = load i64, i64* %4, align 1, !dbg !22 49 ret i64 %5, !dbg !22 50} 51 52; Function Attrs: nounwind readnone 53declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 54 55; Function Attrs: nounwind 56declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #2 57 58; Function Attrs: nounwind 59declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2 60 61attributes #0 = { nounwind } 62attributes #1 = { nounwind readnone } 63attributes #2 = { nounwind } 64 65!llvm.dbg.cu = !{!0} 66!llvm.module.flags = !{!13, !14} 67!llvm.ident = !{!15} 68 69!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 70!1 = !DIFile(filename: "<stdin>", directory: "") 71!2 = !{} 72!4 = distinct !DISubprogram(name: "src_reg_for_float", line: 7, isLocal: false, isDefinition: true, isOptimized: false, unit: !0, scopeLine: 7, file: !5, scope: !6, type: !7, variables: !2) 73!5 = !DIFile(filename: "pr22495.c", directory: "") 74!6 = !DIFile(filename: "pr22495.c", directory: "") 75!7 = !DISubroutineType(types: !8) 76!8 = !{!9} 77!9 = !DICompositeType(tag: DW_TAG_structure_type, name: "prog_src_register", line: 1, size: 64, align: 32, file: !5, elements: !10) 78!10 = !{!11} 79!11 = !DIDerivedType(tag: DW_TAG_member, name: "Index", line: 3, size: 13, align: 32, offset: 4, file: !5, scope: !9, baseType: !12) 80!12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 81!13 = !{i32 2, !"Dwarf Version", i32 4} 82!14 = !{i32 2, !"Debug Info Version", i32 3} 83!15 = !{!"clang version 3.7.0 "} 84!16 = !DILocalVariable(name: "a", line: 8, scope: !4, file: !6, type: !9) 85!17 = !DIExpression() 86!18 = !DILocation(line: 8, scope: !4) 87!19 = !DILocation(line: 9, scope: !4) 88!20 = !DILocalVariable(name: "local", line: 10, scope: !4, file: !6, type: !12) 89!21 = !DILocation(line: 10, scope: !4) 90!22 = !DILocation(line: 11, scope: !4) 91