PR14606: debug info imported_module support

Adding another CU-wide list, in this case of imported_modules (since they
should be relatively rare, it seemed better to add a list where each element
had a "context" value, rather than add a (usually empty) list to every scope).
This takes care of DW_TAG_imported_module, but to fully address PR14606 we'll
need to expand this to cover DW_TAG_imported_declaration too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179836 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 40 insertions, 12 deletions

diff --git a/test/DebugInfo/namespace.ll b/test/DebugInfo/namespace.ll
index 4ca777c3e5..dc5d282ede 100644
--- a/test/DebugInfo/namespace.ll
+++ b/test/DebugInfo/namespace.ll
@@ -8,13 +8,21 @@
 ; CHECK-NEXT: DW_AT_decl_file{{.*}}(0x0[[F1:[0-9]]])
 ; CHECK-NEXT: DW_AT_decl_line{{.*}}(0x03)
 ; CHECK-NOT: NULL
-; CHECK: DW_TAG_namespace
+; CHECK: [[NS2:0x[0-9a-f]*]]:{{ *}}DW_TAG_namespace
 ; CHECK-NEXT: DW_AT_name{{.*}} = "B"
 ; CHECK-NEXT: DW_AT_decl_file{{.*}}(0x0[[F2:[0-9]]])
 ; CHECK-NEXT: DW_AT_decl_line{{.*}}(0x01)
 ; CHECK-NOT: NULL
 ; CHECK: DW_TAG_variable
 ; CHECK-NEXT: DW_AT_name{{.*}}= "i"
+; CHECK: DW_TAG_subprogram
+; CHECK-NEXT: DW_AT_MIPS_linkage_name
+; CHECK-NEXT: DW_AT_name{{.*}}= "func"
+; CHECK-NOT: NULL
+; CHECK: DW_TAG_imported_module
+; CHECK-NEXT: DW_AT_decl_file{{.*}}(0x0[[F2]])
+; CHECK-NEXT: DW_AT_decl_line{{.*}}(0x07)
+; CHECK-NEXT: DW_AT_import{{.*}}=> {[[NS2]]})
 ; CHECK: file_names[  [[F1]]]{{.*}}debug-info-namespace.cpp
 ; CHECK: file_names[  [[F2]]]{{.*}}foo.cpp
 
@@ -26,19 +34,39 @@
 ; int i;
 ; }
 ; }
+;
+; int func() {
+;   using namespace A::B;
+;   return i;
+; }
 
 @_ZN1A1B1iE = global i32 0, align 4
 
+; Function Attrs: nounwind uwtable 
+define i32 @_Z4funcv() #0 {
+entry:
+  %0 = load i32* @_ZN1A1B1iE, align 4, !dbg !16
+  ret i32 %0, !dbg !16
+}
+
+attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
 !llvm.dbg.cu = !{!0}
 
-!0 = metadata !{i32 786449, metadata !2, i32 4, metadata !"clang version 3.3 ", i1 false, metadata !"", i32 0, metadata !3, metadata !3, metadata !3, metadata !4, metadata !""} ; [ DW_TAG_compile_unit ] [/home/foo/debug-info-namespace.cpp] [DW_LANG_C_plus_plus]
-!1 = metadata !{i32 786473, metadata !2}          ; [ DW_TAG_file_type ] [/home/foo/debug-info-namespace.cpp]
-!2 = metadata !{metadata !"debug-info-namespace.cpp", metadata !"/home/foo"}
-!3 = metadata !{i32 0}
-!4 = metadata !{metadata !5}
-!5 = metadata !{i32 786484, i32 0, metadata !6, metadata !"i", metadata !"i", metadata !"_ZN1A1B1iE", metadata !7, i32 2, metadata !10, i32 0, i32 1, i32* @_ZN1A1B1iE, null} ; [ DW_TAG_variable ] [i] [line 2] [def]
-!6 = metadata !{i32 786489, metadata !8, metadata !9, metadata !"B", i32 1} ; [ DW_TAG_namespace ] [B] [line 1]
-!7 = metadata !{i32 786473, metadata !8}          ; [ DW_TAG_file_type ] [/home/foo/foo.cpp]
-!8 = metadata !{metadata !"foo.cpp", metadata !"/home/foo"}
-!9 = metadata !{i32 786489, metadata !2, null, metadata !"A", i32 3} ; [ DW_TAG_namespace ] [A] [line 3]
-!10 = 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]
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.3 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !10, metadata !14, metadata !""} ; [ DW_TAG_compile_unit ] [/usr/local/google/home/blaikie/dev/llvm/src/tools/clang//usr/local/google/home/blaikie/dev/llvm/src/tools/clang/test/CodeGenCXX/debug-info-namespace.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"/usr/local/google/home/blaikie/dev/llvm/src/tools/clang/test/CodeGenCXX/debug-info-namespace.cpp", metadata !"/usr/local/google/home/blaikie/dev/llvm/src/tools/clang"}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{i32 786478, metadata !5, metadata !6, metadata !"func", metadata !"func", metadata !"_Z4funcv", i32 6, metadata !7, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z4funcv, null, null, metadata !2, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [func]
+!5 = metadata !{metadata !"foo.cpp", metadata !"/usr/local/google/home/blaikie/dev/llvm/src/tools/clang"}
+!6 = metadata !{i32 786473, metadata !5}          ; [ DW_TAG_file_type ] [/usr/local/google/home/blaikie/dev/llvm/src/tools/clang/foo.cpp]
+!7 = metadata !{i32 786453, i32 0, i32 0, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!8 = metadata !{metadata !9}
+!9 = 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]
+!10 = metadata !{metadata !11}
+!11 = metadata !{i32 786484, i32 0, metadata !12, metadata !"i", metadata !"i", metadata !"_ZN1A1B1iE", metadata !6, i32 2, metadata !9, i32 0, i32 1, i32* @_ZN1A1B1iE, null} ; [ DW_TAG_variable ] [i] [line 2] [def]
+!12 = metadata !{i32 786489, metadata !5, metadata !13, metadata !"B", i32 1} ; [ DW_TAG_namespace ] [B] [line 1]
+!13 = metadata !{i32 786489, metadata !1, null, metadata !"A", i32 3} ; [ DW_TAG_namespace ] [A] [line 3]
+!14 = metadata !{metadata !15}
+!15 = metadata !{i32 786490, metadata !4, metadata !12, i32 7} ; [ DW_TAG_imported_module ]
+!16 = metadata !{i32 8, i32 0, metadata !4, null}