add no_dead_strip to OBJC_CLASS_REFERENCES_ and OBJC_SELECTOR_REFERENCES_

Author: jbatez

compiler/rustc_codegen_llvm/src/consts.rs

@@ -611,7 +611,7 @@ impl<'ll> CodegenCx<'ll, '_> {
             set_global_alignment(self, g, self.tcx.data_layout.pointer_align().abi);
             llvm::set_initializer(g, llval);
             llvm::set_linkage(g, llvm::Linkage::PrivateLinkage);
-            llvm::set_section(g, c"__OBJC,__cls_refs,literal_pointers");
+            llvm::set_section(g, c"__OBJC,__cls_refs,literal_pointers,no_dead_strip");
             self.add_compiler_used_global(g);
             g
         } else {
@@ -630,7 +630,7 @@ impl<'ll> CodegenCx<'ll, '_> {
             set_global_alignment(self, g, self.tcx.data_layout.pointer_align().abi);
             llvm::set_initializer(g, llval);
             llvm::set_linkage(g, llvm::Linkage::InternalLinkage);
-            llvm::set_section(g, c"__DATA,__objc_classrefs,regular");
+            llvm::set_section(g, c"__DATA,__objc_classrefs,regular,no_dead_strip");
             self.add_compiler_used_global(g);
             g
         };
@@ -682,10 +682,10 @@ impl<'ll> CodegenCx<'ll, '_> {
         llvm::set_initializer(selref_g, selref_llval);
         if is_x86_32_macos {
             llvm::set_linkage(selref_g, llvm::Linkage::PrivateLinkage);
-            llvm::set_section(selref_g, c"__OBJC,__message_refs,literal_pointers");
+            llvm::set_section(selref_g, c"__OBJC,__message_refs,literal_pointers,no_dead_strip");
         } else {
             llvm::set_linkage(selref_g, llvm::Linkage::InternalLinkage);
-            llvm::set_section(selref_g, c"__DATA,__objc_selrefs,literal_pointers");
+            llvm::set_section(selref_g, c"__DATA,__objc_selrefs,literal_pointers,no_dead_strip");
         }
         self.add_compiler_used_global(selref_g);
 

tests/codegen-llvm/darwin-objc-32bit-x86-macos.rs

@@ -32,10 +32,10 @@ pub fn get_selector() -> *mut () {
 // CHECK: %struct._objc_module = type { i32, i32, ptr, ptr }
 
 // CHECK: @OBJC_CLASS_NAME_.{{[0-9]+}} = private unnamed_addr constant [8 x i8] c"MyClass\00", section "__TEXT,__cstring,cstring_literals", align 1
-// CHECK: @OBJC_CLASS_REFERENCES_.{{[0-9]+}} = private global ptr @OBJC_CLASS_NAME_.{{[0-9]+}}, section "__OBJC,__cls_refs,literal_pointers", align 4
+// CHECK: @OBJC_CLASS_REFERENCES_.{{[0-9]+}} = private global ptr @OBJC_CLASS_NAME_.{{[0-9]+}}, section "__OBJC,__cls_refs,literal_pointers,no_dead_strip", align 4
 
 // CHECK: @OBJC_METH_VAR_NAME_.{{[0-9]+}} = private unnamed_addr constant [9 x i8] c"myMethod\00", section "__TEXT,__cstring,cstring_literals", align 1
-// CHECK: @OBJC_SELECTOR_REFERENCES_.{{[0-9]+}} = private global ptr @OBJC_METH_VAR_NAME_.{{[0-9]+}}, section "__OBJC,__message_refs,literal_pointers", align 4
+// CHECK: @OBJC_SELECTOR_REFERENCES_.{{[0-9]+}} = private global ptr @OBJC_METH_VAR_NAME_.{{[0-9]+}}, section "__OBJC,__message_refs,literal_pointers,no_dead_strip", align 4
 
 // CHECK: @OBJC_CLASS_NAME_.{{[0-9]+}} = private unnamed_addr constant [1 x i8] zeroinitializer, section "__TEXT,__cstring,cstring_literals", align 1
 // CHECK: @OBJC_MODULES = private global %struct._objc_module { i32 7, i32 16, ptr @OBJC_CLASS_NAME_.{{[0-9]+}}, ptr null }, section "__OBJC,__module_info,regular,no_dead_strip", align 4

tests/codegen-llvm/darwin-objc.rs

@@ -49,7 +49,7 @@ pub fn get_selector() -> *mut () {
 
 // CHECK: %struct._class_t = type { ptr, ptr, ptr, ptr, ptr }
 // CHECK: @"OBJC_CLASS_$_MyClass" = external global %struct._class_t
-// CHECK: @"OBJC_CLASSLIST_REFERENCES_$_.{{[0-9]+}}" = internal global ptr @"OBJC_CLASS_$_MyClass", section "__DATA,__objc_classrefs,regular",
+// CHECK: @"OBJC_CLASSLIST_REFERENCES_$_.{{[0-9]+}}" = internal global ptr @"OBJC_CLASS_$_MyClass", section "__DATA,__objc_classrefs,regular,no_dead_strip",
 // x86_64_macos-SAME: align 8
 // aarch64_macos-SAME: align 8
 // i386_ios-SAME: align 4
@@ -59,7 +59,7 @@ pub fn get_selector() -> *mut () {
 // aarch64_ios_sim-SAME: align 8
 
 // CHECK: @OBJC_METH_VAR_NAME_.{{[0-9]+}} = private unnamed_addr constant [9 x i8] c"myMethod\00", section "__TEXT,__objc_methname,cstring_literals", align 1
-// CHECK: @OBJC_SELECTOR_REFERENCES_.{{[0-9]+}} = internal global ptr @OBJC_METH_VAR_NAME_.{{[0-9]+}}, section "__DATA,__objc_selrefs,literal_pointers",
+// CHECK: @OBJC_SELECTOR_REFERENCES_.{{[0-9]+}} = internal global ptr @OBJC_METH_VAR_NAME_.{{[0-9]+}}, section "__DATA,__objc_selrefs,literal_pointers,no_dead_strip",
 // x86_64_macos-SAME: align 8
 // aarch64_macos-SAME: align 8
 // i386_ios-SAME: align 4