Merge PCHWriterDecl.cpp's isRequiredDecl and CodeGenModule::MayDeferGeneration into a new function,
DeclIsRequiredFunctionOrFileScopedVar.
This is essentially a CodeGen predicate that is also needed by the PCH mechanism to determine whether a decl
needs to be deserialized during PCH loading for codegen purposes.
Since this logic is shared by CodeGen and the PCH mechanism, move it to the ASTContext,
thus CodeGenModule's GetLinkageForFunction/GetLinkageForVariable and the GVALinkage enum is moved out of CodeGen.
This fixes current (and avoids future) codegen-from-PCH bugs.
llvm-svn: 109784
diff --git a/clang/test/PCH/cxx-required-decls.cpp b/clang/test/PCH/cxx-required-decls.cpp
index 0e39ce3..818958e 100644
--- a/clang/test/PCH/cxx-required-decls.cpp
+++ b/clang/test/PCH/cxx-required-decls.cpp
@@ -6,3 +6,4 @@
// RUN: %clang_cc1 -include-pch %t %s -emit-llvm -o - | FileCheck %s
// CHECK: @_ZL5globS = internal global %struct.S zeroinitializer
+// CHECK: @_ZL3bar = internal global i32 0, align 4