1 files changed, 113 insertions, 0 deletions
diff --git a/test/DebugInfo/X86/debug-loc-offset.ll b/test/DebugInfo/X86/debug-loc-offset.ll
new file mode 100644
index 0000000..b10309c
--- /dev/null
+++ b/test/DebugInfo/X86/debug-loc-offset.ll
@@ -0,0 +1,113 @@
+; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t
+; RUN: llvm-dwarfdump %t | FileCheck %s
+
+; From the code:
+
+; bar.cpp
+; int bar (int b) {
+;   return b+4;
+; }
+
+; foo.cpp
+; struct A {
+;   int a;
+;   int b;
+;   int c;
+; };
+
+; int a (struct A var) {
+;   return var.a;
+; }
+
+; Compiled separately for i386-pc-linux-gnu and linked together.
+; This ensures that we have multiple compile units so that we can verify that
+; debug_loc entries are relative to the low_pc of the CU. The loc entry for
+; the byval argument in foo.cpp is in the second CU and so should have
+; an offset relative to that CU rather than from the beginning of the text
+; section.
+
+; Checking that we have two compile units with two sets of high/lo_pc.
+; CHECK: .debug_info contents
+; CHECK: DW_TAG_compile_unit
+; CHECK: DW_AT_low_pc
+; CHECK: DW_AT_high_pc
+
+; CHECK: DW_TAG_compile_unit
+; CHECK: DW_AT_low_pc
+; CHECK: DW_AT_high_pc
+
+; CHECK: DW_TAG_subprogram
+; CHECK-NEXT: DW_AT_MIPS_linkage_name [DW_FORM_strp]{{.*}}"_Z1a1A"
+; CHECK: DW_TAG_formal_parameter
+; CHECK-NEXT: DW_AT_name [DW_FORM_strp]{{.*}}"var"
+; CHECK: DW_AT_location [DW_FORM_sec_offset]   (0x00000000)
+; CHECK-NOT: DW_AT_location
+
+; CHECK: .debug_loc contents:
+; CHECK: 0x00000000: Beginning address offset: 0x0000000000000000
+; CHECK:                Ending address offset: 0x0000000000000009
+
+
+%struct.A = type { i32, i32, i32 }
+
+; Function Attrs: nounwind
+define i32 @_Z3bari(i32 %b) #0 {
+entry:
+  %b.addr = alloca i32, align 4
+  store i32 %b, i32* %b.addr, align 4
+  call void @llvm.dbg.declare(metadata !{i32* %b.addr}, metadata !25), !dbg !26
+  %0 = load i32* %b.addr, align 4, !dbg !27
+  %add = add nsw i32 %0, 4, !dbg !27
+  ret i32 %add, !dbg !27
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata) #1
+
+; Function Attrs: nounwind
+define i32 @_Z1a1A(%struct.A* byval align 4 %var) #0 {
+entry:
+  call void @llvm.dbg.declare(metadata !{%struct.A* %var}, metadata !28), !dbg !29
+  %a = getelementptr inbounds %struct.A* %var, i32 0, i32 0, !dbg !30
+  %0 = load i32* %a, align 4, !dbg !30
+  ret i32 %0, !dbg !30
+}
+
+attributes #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" }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0, !9}
+!llvm.module.flags = !{!22, !23}
+!llvm.ident = !{!24, !24}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (trunk 204264) (llvm/trunk 204286)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1}
+!1 = metadata !{metadata !"bar.cpp", metadata !"/usr/local/google/home/echristo/tmp"}
+!2 = metadata !{}
+!3 = metadata !{metadata !4}
+!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"_Z3bari", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3bari, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [bar]
+!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/tmp/bar.cpp]
+!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{metadata !8, metadata !8}
+!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!9 = metadata !{i32 786449, metadata !10, i32 4, metadata !"clang version 3.5.0 (trunk 204264) (llvm/trunk 204286)", i1 false, metadata !"", i32 0, metadata !2, metadata !11, metadata !17, metadata !2, metadata !2, metadata !"", i32 1}
+!10 = metadata !{metadata !"foo.cpp", metadata !"/usr/local/google/home/echristo/tmp"}
+!11 = metadata !{metadata !12}
+!12 = metadata !{i32 786451, metadata !10, null, metadata !"A", i32 1, i64 96, i64 32, i32 0, i32 0, null, metadata !13, i32 0, null, null, metadata !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 96, align 32, offset 0] [def] [from ]
+!13 = metadata !{metadata !14, metadata !15, metadata !16}
+!14 = metadata !{i32 786445, metadata !10, metadata !"_ZTS1A", metadata !"a", i32 2, i64 32, i64 32, i64 0, i32 0, metadata !8} ; [ DW_TAG_member ] [a] [line 2, size 32, align 32, offset 0] [from int]
+!15 = metadata !{i32 786445, metadata !10, metadata !"_ZTS1A", metadata !"b", i32 3, i64 32, i64 32, i64 32, i32 0, metadata !8} ; [ DW_TAG_member ] [b] [line 3, size 32, align 32, offset 32] [from int]
+!16 = metadata !{i32 786445, metadata !10, metadata !"_ZTS1A", metadata !"c", i32 4, i64 32, i64 32, i64 64, i32 0, metadata !8} ; [ DW_TAG_member ] [c] [line 4, size 32, align 32, offset 64] [from int]
+!17 = metadata !{metadata !18}
+!18 = metadata !{i32 786478, metadata !10, metadata !19, metadata !"a", metadata !"a", metadata !"_Z1a1A", i32 7, metadata !20, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (%struct.A*)* @_Z1a1A, null, null, metadata !2, i32 7} ; [ DW_TAG_subprogram ] [line 7] [def] [a]
+!19 = metadata !{i32 786473, metadata !10}        ; [ DW_TAG_file_type ] [/usr/local/google/home/echristo/tmp/foo.cpp]
+!20 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !21, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!21 = metadata !{metadata !8, metadata !12}
+!22 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!23 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!24 = metadata !{metadata !"clang version 3.5.0 (trunk 204264) (llvm/trunk 204286)"}
+!25 = metadata !{i32 786689, metadata !4, metadata !"b", metadata !5, i32 16777217, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [b] [line 1]
+!26 = metadata !{i32 1, i32 0, metadata !4, null}
+!27 = metadata !{i32 2, i32 0, metadata !4, null}
+!28 = metadata !{i32 786689, metadata !18, metadata !"var", metadata !19, i32 16777223, metadata !"_ZTS1A", i32 0, i32 0}
+!29 = metadata !{i32 7, i32 0, metadata !18, null}
+!30 = metadata !{i32 8, i32 0, metadata !18, null} ; [ DW_TAG_imported_declaration ]