Debug Info: Use DIScopeRef for DIType::getContext.

    
In DIBuilder, the context field of a TAG_member is updated to use the
scope reference. Verifier is updated accordingly.
    
DebugInfoFinder now needs to generate a type identifier map to have
access to the actual scope. Same applies for BreakpointPrinter.
    
processModule of DebugInfoFinder is called during initialization phase
of the verifier to make sure the type identifier map is constructed early
enough.
    
We are now able to unique a simple class as demonstrated by the added
testing case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190334 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 141 insertions, 0 deletions

diff --git a/test/Linker/type-unique-simple-a.ll b/test/Linker/type-unique-simple-a.ll
new file mode 100644
index 0000000000..4172f69252
--- /dev/null
+++ b/test/Linker/type-unique-simple-a.ll
@@ -0,0 +1,73 @@
+; RUN: llvm-link %s %p/type-unique-simple-b.ll -S -o - | FileCheck %s
+
+; CHECK: DW_TAG_structure_type
+; CHECK-NOT: DW_TAG_structure_type
+; Content of header files:
+; struct Base {
+;   int a;
+;   //Base *b;
+; };
+; Content of foo.cpp:
+; 
+; #include "a.hpp"
+; void f(int a) {
+;   Base t;
+; }
+; Content of bar.cpp:
+; 
+; #include "a.hpp"
+; void f(int);
+; void g(int a) {
+;   Base t;
+; }
+; int main() {
+;   f(0);
+;   g(1);
+;   return 0;
+; }
+; ModuleID = 'foo.cpp'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+%struct.Base = type { i32 }
+
+; Function Attrs: nounwind ssp uwtable
+define void @_Z1fi(i32 %a) #0 {
+entry:
+  %a.addr = alloca i32, align 4
+  %t = alloca %struct.Base, align 4
+  store i32 %a, i32* %a.addr, align 4
+  call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !15), !dbg !16
+  call void @llvm.dbg.declare(metadata !{%struct.Base* %t}, metadata !17), !dbg !18
+  ret void, !dbg !19
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata) #1
+
+attributes #0 = { nounwind ssp uwtable "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}
+!llvm.module.flags = !{!14}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4 (http://llvm.org/git/clang.git c23b1db6268c8e7ce64026d57d1510c1aac200a0) (http://llvm.org/git/llvm.git 09b98fe3978eddefc2145adc1056cf21580ce945)", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata !9, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/Users/mren/c_testing/type_unique_air/simple/foo.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"foo.cpp", metadata !"/Users/mren/c_testing/type_unique_air/simple"}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{i32 786451, metadata !5, null, metadata !"Base", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !6, i32 0, null, null, metadata !"_ZTS4Base"} ; [ DW_TAG_structure_type ] [Base] [line 1, size 32, align 32, offset 0] [def] [from ]
+!5 = metadata !{metadata !"./a.hpp", metadata !"/Users/mren/c_testing/type_unique_air/simple"}
+!6 = metadata !{metadata !7}
+!7 = metadata !{i32 786445, metadata !5, metadata !"_ZTS4Base", 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]
+!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 !{metadata !10}
+!10 = metadata !{i32 786478, metadata !1, metadata !11, metadata !"f", metadata !"f", metadata !"_Z1fi", i32 3, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32)* @_Z1fi, null, null, metadata !2, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [f]
+!11 = metadata !{i32 786473, metadata !1}         ; [ DW_TAG_file_type ] [/Users/mren/c_testing/type_unique_air/simple/foo.cpp]
+!12 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{null, metadata !8}
+!14 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
+!15 = metadata !{i32 786689, metadata !10, metadata !"a", metadata !11, i32 16777219, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 3]
+!16 = metadata !{i32 3, i32 0, metadata !10, null}
+!17 = metadata !{i32 786688, metadata !10, metadata !"t", metadata !11, i32 4, metadata !4, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [t] [line 4]
+!18 = metadata !{i32 4, i32 0, metadata !10, null}
+!19 = metadata !{i32 5, i32 0, metadata !10, null}
diff --git a/test/Linker/type-unique-simple-b.ll b/test/Linker/type-unique-simple-b.ll
new file mode 100644
index 0000000000..9f48500e2e
--- /dev/null
+++ b/test/Linker/type-unique-simple-b.ll
@@ -0,0 +1,68 @@
+; RUN: true
+
+; ModuleID = 'bar.cpp'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+%struct.Base = type { i32 }
+
+; Function Attrs: nounwind ssp uwtable
+define void @_Z1gi(i32 %a) #0 {
+entry:
+  %a.addr = alloca i32, align 4
+  %t = alloca %struct.Base, align 4
+  store i32 %a, i32* %a.addr, align 4
+  call void @llvm.dbg.declare(metadata !{i32* %a.addr}, metadata !18), !dbg !19
+  call void @llvm.dbg.declare(metadata !{%struct.Base* %t}, metadata !20), !dbg !21
+  ret void, !dbg !22
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata) #1
+
+; Function Attrs: ssp uwtable
+define i32 @main() #2 {
+entry:
+  %retval = alloca i32, align 4
+  store i32 0, i32* %retval
+  call void @_Z1fi(i32 0), !dbg !23
+  call void @_Z1gi(i32 1), !dbg !24
+  ret i32 0, !dbg !25
+}
+
+declare void @_Z1fi(i32) #3
+
+attributes #0 = { nounwind ssp uwtable "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 }
+attributes #2 = { ssp uwtable "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 #3 = { "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" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!17}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4 (http://llvm.org/git/clang.git c23b1db6268c8e7ce64026d57d1510c1aac200a0) (http://llvm.org/git/llvm.git 09b98fe3978eddefc2145adc1056cf21580ce945)", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata !9, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/Users/mren/c_testing/type_unique_air/simple/bar.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"bar.cpp", metadata !"/Users/mren/c_testing/type_unique_air/simple"}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{i32 786451, metadata !5, null, metadata !"Base", i32 1, i64 32, i64 32, i32 0, i32 0, null, metadata !6, i32 0, null, null, metadata !"_ZTS4Base"} ; [ DW_TAG_structure_type ] [Base] [line 1, size 32, align 32, offset 0] [def] [from ]
+!5 = metadata !{metadata !"./a.hpp", metadata !"/Users/mren/c_testing/type_unique_air/simple"}
+!6 = metadata !{metadata !7}
+!7 = metadata !{i32 786445, metadata !5, metadata !"_ZTS4Base", 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]
+!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 !{metadata !10, metadata !14}
+!10 = metadata !{i32 786478, metadata !1, metadata !11, metadata !"g", metadata !"g", metadata !"_Z1gi", i32 4, metadata !12, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (i32)* @_Z1gi, null, null, metadata !2, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [g]
+!11 = metadata !{i32 786473, metadata !1}         ; [ DW_TAG_file_type ] [/Users/mren/c_testing/type_unique_air/simple/bar.cpp]
+!12 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{null, metadata !8}
+!14 = metadata !{i32 786478, metadata !1, metadata !11, metadata !"main", metadata !"main", metadata !"", i32 7, metadata !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @main, null, null, metadata !2, i32 7} ; [ DW_TAG_subprogram ] [line 7] [def] [main]
+!15 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!16 = metadata !{metadata !8}
+!17 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
+!18 = metadata !{i32 786689, metadata !10, metadata !"a", metadata !11, i32 16777220, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [a] [line 4]
+!19 = metadata !{i32 4, i32 0, metadata !10, null}
+!20 = metadata !{i32 786688, metadata !10, metadata !"t", metadata !11, i32 5, metadata !4, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [t] [line 5]
+!21 = metadata !{i32 5, i32 0, metadata !10, null}
+!22 = metadata !{i32 6, i32 0, metadata !10, null}
+!23 = metadata !{i32 8, i32 0, metadata !14, null} ; [ DW_TAG_imported_declaration ]
+!24 = metadata !{i32 9, i32 0, metadata !14, null}
+!25 = metadata !{i32 10, i32 0, metadata !14, null}