1; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t 2; RUN: llvm-dwarfdump %t | FileCheck %s 3 4; From the code: 5 6; debug-loc-offset1.cc 7; int bar (int b) { 8; return b+4; 9; } 10 11; debug-loc-offset2.cc 12; struct A { 13; int var; 14; virtual char foo(); 15; }; 16 17; void baz(struct A a) { 18; int z = 2; 19; if (a.var > 2) 20; z++; 21; if (a.foo() == 'a') 22; z++; 23; } 24 25; Compiled separately for i386-pc-linux-gnu and linked together. 26; This ensures that we have multiple compile units so that we can verify that 27; debug_loc entries are relative to the low_pc of the CU. The loc entry for 28; the byval argument in foo.cpp is in the second CU and so should have 29; an offset relative to that CU rather than from the beginning of the text 30; section. 31 32; Checking that we have two compile units with two sets of high/lo_pc. 33; CHECK: .debug_info contents 34; CHECK: DW_TAG_compile_unit 35; CHECK: DW_AT_low_pc 36; CHECK: DW_AT_high_pc 37 38; CHECK: DW_TAG_compile_unit 39; CHECK: DW_AT_low_pc 40; CHECK: DW_AT_high_pc 41 42; CHECK: DW_TAG_subprogram 43; CHECK-NOT: DW_TAG 44; CHECK: DW_AT_MIPS_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A" 45; CHECK-NOT: {{DW_TAG|NULL}} 46; CHECK: DW_TAG_formal_parameter 47; CHECK-NOT: DW_TAG 48; CHECK: DW_AT_location [DW_FORM_sec_offset] (0x00000000) 49; CHECK-NOT: DW_TAG 50; CHECK: DW_AT_name [DW_FORM_strp]{{.*}}"a" 51 52; CHECK: DW_TAG_variable 53; CHECK: DW_AT_location [DW_FORM_exprloc] 54; CHECK-NOT: DW_AT_location 55 56; CHECK: .debug_loc contents: 57; CHECK: 0x00000000: Beginning address offset: 0x0000000000000000 58; CHECK: Ending address offset: 0x000000000000001a 59 60%struct.A = type { i32 (...)**, i32 } 61 62; Function Attrs: nounwind 63define i32 @_Z3bari(i32 %b) #0 { 64entry: 65 %b.addr = alloca i32, align 4 66 store i32 %b, i32* %b.addr, align 4 67 call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !21, metadata !{!"0x102"}), !dbg !22 68 %0 = load i32* %b.addr, align 4, !dbg !23 69 %add = add nsw i32 %0, 4, !dbg !23 70 ret i32 %add, !dbg !23 71} 72 73; Function Attrs: nounwind readnone 74declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 75 76define void @_Z3baz1A(%struct.A* %a) #2 { 77entry: 78 %z = alloca i32, align 4 79 call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !24, metadata !{!"0x102"}), !dbg !25 80 call void @llvm.dbg.declare(metadata i32* %z, metadata !26, metadata !{!"0x102"}), !dbg !27 81 store i32 2, i32* %z, align 4, !dbg !27 82 %var = getelementptr inbounds %struct.A* %a, i32 0, i32 1, !dbg !28 83 %0 = load i32* %var, align 4, !dbg !28 84 %cmp = icmp sgt i32 %0, 2, !dbg !28 85 br i1 %cmp, label %if.then, label %if.end, !dbg !28 86 87if.then: ; preds = %entry 88 %1 = load i32* %z, align 4, !dbg !30 89 %inc = add nsw i32 %1, 1, !dbg !30 90 store i32 %inc, i32* %z, align 4, !dbg !30 91 br label %if.end, !dbg !30 92 93if.end: ; preds = %if.then, %entry 94 %call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !31 95 %conv = sext i8 %call to i32, !dbg !31 96 %cmp1 = icmp eq i32 %conv, 97, !dbg !31 97 br i1 %cmp1, label %if.then2, label %if.end4, !dbg !31 98 99if.then2: ; preds = %if.end 100 %2 = load i32* %z, align 4, !dbg !33 101 %inc3 = add nsw i32 %2, 1, !dbg !33 102 store i32 %inc3, i32* %z, align 4, !dbg !33 103 br label %if.end4, !dbg !33 104 105if.end4: ; preds = %if.then2, %if.end 106 ret void, !dbg !34 107} 108 109declare signext i8 @_ZN1A3fooEv(%struct.A*) #2 110 111attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 112attributes #1 = { nounwind readnone } 113attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 114 115!llvm.dbg.cu = !{!0, !9} 116!llvm.module.flags = !{!18, !19} 117!llvm.ident = !{!20, !20} 118 119!0 = !{!"0x11\004\00clang version 3.5.0 (210479)\000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/debug-loc-offset1.cc] [DW_LANG_C_plus_plus] 120!1 = !{!"debug-loc-offset1.cc", !"/llvm_cmake_gcc"} 121!2 = !{} 122!3 = !{!4} 123!4 = !{!"0x2e\00bar\00bar\00_Z3bari\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @_Z3bari, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [bar] 124!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/debug-loc-offset1.cc] 125!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 126!7 = !{!8, !8} 127!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] 128!9 = !{!"0x11\004\00clang version 3.5.0 (210479)\000\00\000\00\001", !10, !2, !11, !13, !2, !2} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/debug-loc-offset2.cc] [DW_LANG_C_plus_plus] 129!10 = !{!"debug-loc-offset2.cc", !"/llvm_cmake_gcc"} 130!11 = !{!12} 131!12 = !{!"0x13\00A\001\000\000\000\004\000", !10, null, null, null, null, null, !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 0, align 0, offset 0] [decl] [from ] 132!13 = !{!14} 133!14 = !{!"0x2e\00baz\00baz\00_Z3baz1A\006\000\001\000\006\00256\000\006", !10, !15, !16, null, void (%struct.A*)* @_Z3baz1A, null, null, !2} ; [ DW_TAG_subprogram ] [line 6] [def] [baz] 134!15 = !{!"0x29", !10} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/debug-loc-offset2.cc] 135!16 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !17, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 136!17 = !{null, !12} 137!18 = !{i32 2, !"Dwarf Version", i32 4} 138!19 = !{i32 2, !"Debug Info Version", i32 2} 139!20 = !{!"clang version 3.5.0 (210479)"} 140!21 = !{!"0x101\00b\0016777217\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [b] [line 1] 141!22 = !MDLocation(line: 1, scope: !4) 142!23 = !MDLocation(line: 2, scope: !4) 143!24 = !{!"0x101\00a\0016777222\008192", !14, !15, !"_ZTS1A"} ; [ DW_TAG_arg_variable ] [a] [line 6] 144!25 = !MDLocation(line: 6, scope: !14) 145!26 = !{!"0x100\00z\007\000", !14, !15, !8} ; [ DW_TAG_auto_variable ] [z] [line 7] 146!27 = !MDLocation(line: 7, scope: !14) 147!28 = !MDLocation(line: 8, scope: !29) 148!29 = !{!"0xb\008\000\000", !10, !14} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/debug-loc-offset2.cc] 149!30 = !MDLocation(line: 9, scope: !29) 150!31 = !MDLocation(line: 10, scope: !32) 151!32 = !{!"0xb\0010\000\000", !10, !14} ; [ DW_TAG_lexical_block ] [/llvm_cmake_gcc/debug-loc-offset2.cc] 152!33 = !MDLocation(line: 11, scope: !32) 153!34 = !MDLocation(line: 12, scope: !14) 154