CodeGen: be more conservative about setting section

The section names currently are MachO specific.  Only set the section on the
variables if the file format is MachO.

llvm-svn: 285126

2 files changed, 89 insertions, 29 deletions

diff --git a/clang/lib/CodeGen/CGObjCMac.cpp b/clang/lib/CodeGen/CGObjCMac.cpp
index e20761ba48a..18bf684aada 100644
--- a/clang/lib/CodeGen/CGObjCMac.cpp
+++ b/clang/lib/CodeGen/CGObjCMac.cpp
@@ -2919,10 +2919,13 @@ CGObjCMac::EmitProtocolList(Twine Name,
                                                   ProtocolRefs.size()),
                              ProtocolRefs);
 
+  StringRef Section;
+  if (CGM.getTriple().isOSBinFormatMachO())
+    Section = "__OBJC,__cat_cls_meth,regular,no_dead_strip";
+
   llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
   llvm::GlobalVariable *GV =
-    CreateMetadataVar(Name, Init, "__OBJC,__cat_cls_meth,regular,no_dead_strip",
-                      CGM.getPointerAlign(), false);
+      CreateMetadataVar(Name, Init, Section, CGM.getPointerAlign(), false);
   return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListPtrTy);
 }
 
@@ -3028,12 +3031,13 @@ llvm::Constant *CGObjCCommonMac::EmitPropertyList(Twine Name,
   Values[2] = llvm::ConstantArray::get(AT, Properties);
   llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
 
+  StringRef Section;
+  if (CGM.getTriple().isOSBinFormatMachO())
+    Section = (ObjCABI == 2) ? "__DATA, __objc_const"
+                             : "__OBJC,__property,regular,no_dead_strip";
+
   llvm::GlobalVariable *GV =
-    CreateMetadataVar(Name, Init,
-                      (ObjCABI == 2) ? "__DATA, __objc_const" :
-                      "__OBJC,__property,regular,no_dead_strip",
-                      CGM.getPointerAlign(),
-                      true);
+      CreateMetadataVar(Name, Init, Section, CGM.getPointerAlign(), true);
   return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.PropertyListPtrTy);
 }
 
@@ -3049,9 +3053,12 @@ CGObjCCommonMac::EmitProtocolMethodTypes(Twine Name,
                                              MethodTypes.size());
   llvm::Constant *Init = llvm::ConstantArray::get(AT, MethodTypes);
 
-  llvm::GlobalVariable *GV = CreateMetadataVar(
-      Name, Init, (ObjCABI == 2) ? "__DATA, __objc_const" : StringRef(),
-      CGM.getPointerAlign(), true);
+  StringRef Section;
+  if (CGM.getTriple().isOSBinFormatMachO() && ObjCABI == 2)
+    Section = "__DATA, __objc_const";
+
+  llvm::GlobalVariable *GV =
+      CreateMetadataVar(Name, Init, Section, CGM.getPointerAlign(), true);
   return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.Int8PtrPtrTy);
 }
 
@@ -5959,18 +5966,21 @@ llvm::GlobalVariable * CGObjCNonFragileABIMac::BuildClassRoTInitializer(
   }
   llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassRonfABITy,
                                                    Values);
+
+  llvm::SmallString<64> ROLabel;
+  llvm::raw_svector_ostream(ROLabel)
+      << ((flags & NonFragileABI_Class_Meta) ? "\01l_OBJC_METACLASS_RO_$_"
+                                             : "\01l_OBJC_CLASS_RO_$_")
+      << ClassName;
+
   llvm::GlobalVariable *CLASS_RO_GV =
-    new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassRonfABITy, false,
-                             llvm::GlobalValue::PrivateLinkage,
-                             Init,
-                             (flags & NonFragileABI_Class_Meta) ?
-                             std::string("\01l_OBJC_METACLASS_RO_$_")+ClassName :
-                             std::string("\01l_OBJC_CLASS_RO_$_")+ClassName);
+      new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassRonfABITy, false,
+                               llvm::GlobalValue::PrivateLinkage, Init, ROLabel);
   CLASS_RO_GV->setAlignment(
     CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassRonfABITy));
-  CLASS_RO_GV->setSection("__DATA, __objc_const");
+  if (CGM.getTriple().isOSBinFormatMachO())
+    CLASS_RO_GV->setSection("__DATA, __objc_const");
   return CLASS_RO_GV;
-
 }
 
 /// BuildClassMetaData - This routine defines that to-level meta-data
@@ -6002,9 +6012,10 @@ llvm::GlobalVariable *CGObjCNonFragileABIMac::BuildClassMetaData(
                                                    Values);
   llvm::GlobalVariable *GV = GetClassGlobal(ClassName, Weak);
   GV->setInitializer(Init);
-  GV->setSection("__DATA, __objc_data");
+  if (CGM.getTriple().isOSBinFormatMachO())
+    GV->setSection("__DATA, __objc_data");
   GV->setAlignment(
-    CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassnfABITy));
+      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassnfABITy));
   if (!CGM.getTriple().isOSBinFormatCOFF())
     if (HiddenVisibility)
       GV->setVisibility(llvm::GlobalValue::HiddenVisibility);
@@ -6333,7 +6344,8 @@ void CGObjCNonFragileABIMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) {
                                ExtCatName.str());
   GCATV->setAlignment(
     CGM.getDataLayout().getABITypeAlignment(ObjCTypes.CategorynfABITy));
-  GCATV->setSection("__DATA, __objc_const");
+  if (CGM.getTriple().isOSBinFormatMachO())
+    GCATV->setSection("__DATA, __objc_const");
   CGM.addCompilerUsedGlobal(GCATV);
   DefinedCategories.push_back(GCATV);
 
@@ -6420,7 +6432,8 @@ CGObjCNonFragileABIMac::EmitMethodList(Twine Name, MethodListType MLT,
                                       llvm::GlobalValue::PrivateLinkage, Init,
                                       Prefix + Name);
   GV->setAlignment(CGM.getDataLayout().getABITypeAlignment(Init->getType()));
-  GV->setSection("__DATA, __objc_const");
+  if (CGM.getTriple().isOSBinFormatMachO())
+    GV->setSection("__DATA, __objc_const");
   CGM.addCompilerUsedGlobal(GV);
   return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListnfABIPtrTy);
 }
@@ -6476,7 +6489,8 @@ CGObjCNonFragileABIMac::EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
       IvarOffsetGV->setVisibility(llvm::GlobalValue::DefaultVisibility);
   }
 
-  IvarOffsetGV->setSection("__DATA, __objc_ivar");
+  if (CGM.getTriple().isOSBinFormatMachO())
+    IvarOffsetGV->setSection("__DATA, __objc_ivar");
   return IvarOffsetGV;
 }
 
@@ -6552,8 +6566,8 @@ llvm::Constant *CGObjCNonFragileABIMac::EmitIvarList(
                              Prefix + OID->getObjCRuntimeNameAsString());
   GV->setAlignment(
     CGM.getDataLayout().getABITypeAlignment(Init->getType()));
-  GV->setSection("__DATA, __objc_const");
-
+  if (CGM.getTriple().isOSBinFormatMachO())
+    GV->setSection("__DATA, __objc_const");
   CGM.addCompilerUsedGlobal(GV);
   return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListnfABIPtrTy);
 }
@@ -6777,9 +6791,9 @@ CGObjCNonFragileABIMac::EmitProtocolList(Twine Name,
   GV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
                                 llvm::GlobalValue::PrivateLinkage,
                                 Init, Name);
-  GV->setSection("__DATA, __objc_const");
-  GV->setAlignment(
-    CGM.getDataLayout().getABITypeAlignment(Init->getType()));
+  GV->setAlignment(CGM.getDataLayout().getABITypeAlignment(Init->getType()));
+  if (CGM.getTriple().isOSBinFormatMachO())
+    GV->setSection("__DATA, __objc_const");
   CGM.addCompilerUsedGlobal(GV);
   return llvm::ConstantExpr::getBitCast(GV,
                                         ObjCTypes.ProtocolListnfABIPtrTy);
@@ -7449,7 +7463,8 @@ CGObjCNonFragileABIMac::GetInterfaceEHType(const ObjCInterfaceDecl *ID,
   Entry->setAlignment(DL.getABITypeAlignment(ObjCTypes.EHTypeTy));
 
   if (ForDefinition)
-    Entry->setSection("__DATA,__objc_const");
+    if (CGM.getTriple().isOSBinFormatMachO())
+      Entry->setSection("__DATA,__objc_const");
 
   return Entry;
 }
diff --git a/clang/test/CodeGenObjC/section-name.m b/clang/test/CodeGenObjC/section-name.m
new file mode 100644
index 00000000000..46775a905b7
--- /dev/null
+++ b/clang/test/CodeGenObjC/section-name.m
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -triple thumbv7--windows-itanium -fdeclspec -fobjc-runtime=ios -emit-llvm -o - %s -Wno-objc-root-class | FileCheck %s
+
+@protocol Protocol
+- (void) protocol_method;
+@end
+
+__declspec(dllexport)
+@interface Interface<Protocol>
+@property(assign) id property;
++ (void) class_method;
+- (void) instance_method;
+@end
+
+
+@implementation Interface
++ (void) class_method {
+}
+
+- (void) protocol_method {
+}
+
+- (void) instance_method {
+}
+@end
+
+@implementation Interface(Category)
+- (void) category_method {
+}
+@end
+
+// CHECK-NOT: @"OBJC_IVAR_$_Interface._property" = {{.*}} section "__DATA, __objc_ivar"
+// CHECK-NOT: @"OBJC_CLASS_$_Interface" = {{.*}} section "__DATA, __objc_data"
+// CHECK-NOT: @"OBJC_METACLASS_$_Interface" = {{.*}} section "__DATA, __objc_data"
+// CHECK-NOT: @"\01l_OBJC_$_CLASS_METHODS_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_Protocol" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_PROTOCOL_METHOD_TYPES_Protocol" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_CLASS_PROTOCOLS_$_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_METACLASS_RO_$_" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_INSTANCE_METHODS_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_INSTANCE_VARIABLES_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_PROP_LIST_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_CLASS_RO_$_Interface" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_CATEGORY_INSTANCE_METHODS_Interface_$_Category" = {{.*}} section "__DATA, __objc_const"
+// CHECK-NOT: @"\01l_OBJC_$_CATEGORY_Interface_$_Category" = {{.*}} section "__DATA, __objc_const"
+