Make sure to generate the right kind of MDNode for enum forward declarations.

PR14029, LLVM part.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165288 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/DIBuilder.h

@@ -331,12 +331,10 @@ namespace llvm {
     /// @param SizeInBits   Member size.
     /// @param AlignInBits  Member alignment.
     /// @param Elements     Enumeration elements.
-    /// @param Flags        Flags (e.g. forward decl)
     DIType createEnumerationType(DIDescriptor Scope, StringRef Name, 
                                  DIFile File, unsigned LineNumber, 
                                  uint64_t SizeInBits, uint64_t AlignInBits,
-                                 DIArray Elements, DIType ClassType,
+                                 DIArray Elements, DIType ClassType);
-                                 unsigned Flags);
 
     /// createSubroutineType - Create subroutine type.
     /// @param File           File in which this subroutine is defined.
@@ -357,7 +355,8 @@ namespace llvm {
 
     /// createForwardDecl - Create a temporary forward-declared type.
     DIType createForwardDecl(unsigned Tag, StringRef Name, DIDescriptor Scope,
-                             DIFile F, unsigned Line, unsigned RuntimeLang = 0);
+                             DIFile F, unsigned Line, unsigned RuntimeLang = 0,
+                             uint64_t SizeInBits = 0, uint64_t AlignInBits = 0);
 
     /// retainType - Retain DIType in a module even if it is not referenced 
     /// through debug info anchors.

lib/VMCore/DIBuilder.cpp

@@ -550,7 +550,7 @@ DIType DIBuilder::createEnumerationType(DIDescriptor Scope, StringRef Name,
                                         uint64_t SizeInBits,
                                         uint64_t AlignInBits,
                                         DIArray Elements,
-                                        DIType ClassType, unsigned Flags) {
+                                        DIType ClassType) {
   // TAG_enumeration_type is encoded in DICompositeType format.
   Value *Elts[] = {
     GetTagConstant(VMContext, dwarf::DW_TAG_enumeration_type),
@@ -561,7 +561,7 @@ DIType DIBuilder::createEnumerationType(DIDescriptor Scope, StringRef Name,
     ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
     ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
     ConstantInt::get(Type::getInt32Ty(VMContext), 0),
-    ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+    ConstantInt::get(Type::getInt32Ty(VMContext), 0),
     ClassType,
     Elements,
     ConstantInt::get(Type::getInt32Ty(VMContext), 0),
@@ -706,7 +706,9 @@ DIType DIBuilder::createTemporaryType(DIFile F) {
 /// can be RAUW'd if the full type is seen.
 DIType DIBuilder::createForwardDecl(unsigned Tag, StringRef Name,
                                     DIDescriptor Scope, DIFile F,
-                                    unsigned Line, unsigned RuntimeLang) {
+                                    unsigned Line, unsigned RuntimeLang,
+                                    uint64_t SizeInBits,
+                                    uint64_t AlignInBits) {
   // Create a temporary MDNode.
   Value *Elts[] = {
     GetTagConstant(VMContext, Tag),
@@ -714,9 +716,8 @@ DIType DIBuilder::createForwardDecl(unsigned Tag, StringRef Name,
     MDString::get(VMContext, Name),
     F,
     ConstantInt::get(Type::getInt32Ty(VMContext), Line),
-    // To ease transition include sizes etc of 0.
+    ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
-    ConstantInt::get(Type::getInt32Ty(VMContext), 0),
+    ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
-    ConstantInt::get(Type::getInt32Ty(VMContext), 0),
     ConstantInt::get(Type::getInt32Ty(VMContext), 0),
     ConstantInt::get(Type::getInt32Ty(VMContext),
                      DIDescriptor::FlagFwdDecl),

test/DebugInfo/X86/enum-fwd-decl.ll

@@ -5,16 +5,14 @@
 
 !llvm.dbg.cu = !{!0}
 
-!0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", metadata !"clang version 3.2 (trunk 157772) (llvm/trunk 157761)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !6, metadata !6, metadata !7} ; [ DW_TAG_compile_unit ]
+!0 = metadata !{i32 786449, i32 0, i32 4, metadata !"foo.cpp", metadata !"/tmp", metadata !"clang version 3.2 (trunk 165274) (llvm/trunk 165272)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/tmp/foo.cpp] [DW_LANG_C_plus_plus]
 !1 = metadata !{metadata !2}
-!2 = metadata !{metadata !3}
+!2 = metadata !{i32 0}
-!3 = metadata !{i32 786436, null, metadata !"E", metadata !4, i32 1, i64 16, i64 16, i32 0, i32 4, null, metadata !5, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
+!3 = metadata !{metadata !4}
-!4 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/Users/echristo/tmp", null} ; [ DW_TAG_file_type ]
+!4 = metadata !{metadata !5}
-!5 = metadata !{i32 0}
+!5 = metadata !{i32 786484, i32 0, null, metadata !"e", metadata !"e", metadata !"", metadata !6, i32 2, metadata !7, i32 0, i32 1, i16* @e} ; [ DW_TAG_variable ] [e] [line 2] [def]
-!6 = metadata !{metadata !5}
+!6 = metadata !{i32 786473, metadata !"foo.cpp", metadata !"/tmp", null} ; [ DW_TAG_file_type ]
-!7 = metadata !{metadata !8}
+!7 = metadata !{i32 786436, null, metadata !"E", metadata !6, i32 1, i64 16, i64 16, i32 0, i32 4, null, null, i32 0} ; [ DW_TAG_enumeration_type ] [E] [line 1, size 16, align 16, offset 0] [fwd] [from ]
-!8 = metadata !{metadata !9}
-!9 = metadata !{i32 786484, i32 0, null, metadata !"e", metadata !"e", metadata !"", metadata !4, i32 2, metadata !3, i32 0, i32 1, i16* @e} ; [ DW_TAG_variable ]
 
 ; CHECK: DW_TAG_enumeration_type
 ; CHECK-NEXT: DW_AT_name