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' 16 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 17 target 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 30 define i64 @src_reg_for_float() #0 !dbg !4 { 31 entry: 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 53 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 54 55 ; Function Attrs: nounwind 56 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #2 57 58 ; Function Attrs: nounwind 59 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2 60 61 attributes #0 = { nounwind } 62 attributes #1 = { nounwind readnone } 63 attributes #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: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 70 !1 = !DIFile(filename: "<stdin>", directory: "") 71 !2 = !{} 72 !3 = !{!4} 73 !4 = distinct !DISubprogram(name: "src_reg_for_float", line: 7, isLocal: false, isDefinition: true, isOptimized: false, scopeLine: 7, file: !5, scope: !6, type: !7, variables: !2) 74 !5 = !DIFile(filename: "pr22495.c", directory: "") 75 !6 = !DIFile(filename: "pr22495.c", directory: "") 76 !7 = !DISubroutineType(types: !8) 77 !8 = !{!9} 78 !9 = !DICompositeType(tag: DW_TAG_structure_type, name: "prog_src_register", line: 1, size: 64, align: 32, file: !5, elements: !10) 79 !10 = !{!11} 80 !11 = !DIDerivedType(tag: DW_TAG_member, name: "Index", line: 3, size: 13, align: 32, offset: 4, file: !5, scope: !9, baseType: !12) 81 !12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 82 !13 = !{i32 2, !"Dwarf Version", i32 4} 83 !14 = !{i32 2, !"Debug Info Version", i32 3} 84 !15 = !{!"clang version 3.7.0 "} 85 !16 = !DILocalVariable(name: "a", line: 8, scope: !4, file: !6, type: !9) 86 !17 = !DIExpression() 87 !18 = !DILocation(line: 8, scope: !4) 88 !19 = !DILocation(line: 9, scope: !4) 89 !20 = !DILocalVariable(name: "local", line: 10, scope: !4, file: !6, type: !12) 90 !21 = !DILocation(line: 10, scope: !4) 91 !22 = !DILocation(line: 11, scope: !4) 92
