1; RUN: llc -O0 %s -filetype=obj -o %t.o 2; RUN: llvm-dwarfdump -debug-dump=loc %t.o | FileCheck %s 3; 4; rdar://problem/15928306 5; 6; Test that we can emit debug info for aggregate values that are split 7; up across multiple registers by SROA. 8; 9; // Compile with -O1. 10; typedef struct { long int a; int b;} S; 11; 12; int foo(S s) { 13; return s.b; 14; } 15; 16; 17; CHECK: .debug_loc contents: 18; 19 20; 0x0000000000000000 - 0x0000000000000006: rdi, piece 0x00000008, rsi, piece 0x00000004 21; CHECK: Beginning address offset: 0x0000000000000000 22; CHECK: Ending address offset: [[LTMP3:.*]] 23; CHECK: Location description: 55 93 08 54 93 04 24; 0x0000000000000006 - 0x0000000000000008: rbp-8, piece 0x00000008, rax, piece 0x00000004 ) 25; CHECK: Beginning address offset: [[LTMP3]] 26; CHECK: Ending address offset: [[END:.*]] 27; CHECK: Location description: 76 78 93 08 54 93 04 28 29target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 30target triple = "x86_64-apple-macosx10.9.0" 31 32; Function Attrs: nounwind ssp uwtable 33define i32 @foo(i64 %s.coerce0, i32 %s.coerce1) #0 { 34entry: 35 call void @llvm.dbg.value(metadata i64 %s.coerce0, i64 0, metadata !20, metadata !24), !dbg !21 36 call void @llvm.dbg.value(metadata i32 %s.coerce1, i64 0, metadata !22, metadata !27), !dbg !21 37 ret i32 %s.coerce1, !dbg !23 38} 39 40; Function Attrs: nounwind readnone 41declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 42 43; Function Attrs: nounwind readnone 44declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1 45 46attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" } 47attributes #1 = { nounwind readnone } 48 49!llvm.dbg.cu = !{!0} 50!llvm.module.flags = !{!17, !18} 51!llvm.ident = !{!19} 52 53!0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 54!1 = !MDFile(filename: "pieces.c", directory: "") 55!2 = !{} 56!3 = !{!4} 57!4 = !MDSubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 3, file: !1, scope: !5, type: !6, function: i32 (i64, i32)* @foo, variables: !15) 58!5 = !MDFile(filename: "pieces.c", directory: "") 59!6 = !MDSubroutineType(types: !7) 60!7 = !{!8, !9} 61!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 62!9 = !MDDerivedType(tag: DW_TAG_typedef, name: "S", line: 1, file: !1, baseType: !10) 63!10 = !MDCompositeType(tag: DW_TAG_structure_type, line: 1, size: 128, align: 64, file: !1, elements: !11) 64!11 = !{!12, !14} 65!12 = !MDDerivedType(tag: DW_TAG_member, name: "a", line: 1, size: 64, align: 64, file: !1, scope: !10, baseType: !13) 66!13 = !MDBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed) 67!14 = !MDDerivedType(tag: DW_TAG_member, name: "b", line: 1, size: 32, align: 32, offset: 64, file: !1, scope: !10, baseType: !8) 68!15 = !{!16} 69!16 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9) 70!17 = !{i32 2, !"Dwarf Version", i32 4} 71!18 = !{i32 1, !"Debug Info Version", i32 3} 72!19 = !{!"clang version 3.5 "} 73!20 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9) 74!21 = !MDLocation(line: 3, scope: !4) 75!22 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "s", line: 3, arg: 1, scope: !4, file: !5, type: !9) 76!23 = !MDLocation(line: 4, scope: !4) 77!24 = !MDExpression(DW_OP_bit_piece, 0, 64) 78!25 = !{} 79!27 = !MDExpression(DW_OP_bit_piece, 64, 32) 80