r241511 - Debug info: Don't emit a bogus location for the global block pointer type

[Adrian Prantl]

Author: adrian
Date: Mon Jul  6 16:31:35 2015
New Revision: 241511

URL: http://llvm.org/viewvc/llvm-project?rev=241511&view=rev
Log:
Debug info: Don't emit a bogus location for the global block pointer type
(__block_literal_generic).

The arbitrary nature of the location confuses lldb and prevents type
uniquing.

rdar://problem/21602473

Modified:
    cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
    cfe/trunk/test/CodeGen/debug-info-block.c

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=241511&r1=241510&r2=241511&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Mon Jul  6 16:31:35 2015
@@ -723,10 +723,10 @@ llvm::DIType *CGDebugInfo::CreateType(co
   EltTys.clear();
 
   unsigned Flags = llvm::DINode::FlagAppleBlock;
-  unsigned LineNo = getLineNumber(CurLoc);
+  unsigned LineNo = 0;
 
   auto *EltTy =
-      DBuilder.createStructType(Unit, "__block_descriptor", Unit, LineNo,
+      DBuilder.createStructType(Unit, "__block_descriptor", nullptr, LineNo,
                                 FieldOffset, 0, Flags, nullptr, Elements);
 
   // Bit size, align and offset of the type.
@@ -746,7 +746,7 @@ llvm::DIType *CGDebugInfo::CreateType(co
   FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
   FieldSize = CGM.getContext().getTypeSize(Ty);
   FieldAlign = CGM.getContext().getTypeAlign(Ty);
-  EltTys.push_back(DBuilder.createMemberType(Unit, "__descriptor", Unit, LineNo,
+  EltTys.push_back(DBuilder.createMemberType(Unit, "__descriptor", nullptr, LineNo,
                                              FieldSize, FieldAlign, FieldOffset,
                                              0, DescTy));
 
@@ -754,7 +754,7 @@ llvm::DIType *CGDebugInfo::CreateType(co
   Elements = DBuilder.getOrCreateArray(EltTys);
 
   EltTy =
-      DBuilder.createStructType(Unit, "__block_literal_generic", Unit, LineNo,
+      DBuilder.createStructType(Unit, "__block_literal_generic", nullptr, LineNo,
                                 FieldOffset, 0, Flags, nullptr, Elements);
 
   BlockLiteralGeneric = DBuilder.createPointerType(EltTy, Size);

Modified: cfe/trunk/test/CodeGen/debug-info-block.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/debug-info-block.c?rev=241511&r1=241510&r2=241511&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/debug-info-block.c (original)
+++ cfe/trunk/test/CodeGen/debug-info-block.c Mon Jul  6 16:31:35 2015
@@ -1,9 +1,11 @@
 // RUN: %clang_cc1 -fblocks -g -emit-llvm -o - %s | FileCheck %s
 // Verify that the desired debugging type is generated for a structure
-//  member that is a pointer to a block. 
+// member that is a pointer to a block.
 
 // CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "__block_literal_generic"
+// CHECK-NOT: line
 // CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "__block_descriptor"
+// CHECK-NOT: line
 struct inStruct {
   void (^genericBlockPtr)();
 } is;