llvm/test/Feature/linker_private_linkages.ll

; RUN: llvm-as < %s | llvm-dis > %t1.ll
; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
; RUN: diff %t1.ll %t2.ll

@foo = linker_private hidden global i32 0
@bar = linker_private_weak hidden global i32 0
@qux = linker_private_weak_def_auto global i32 0
Implement the "linker_private_weak" linkage type. This will be used for Objective-C metadata types which should be marked as "weak", but which the linker will remove upon final linkage. However, this linkage isn't specific to Objective-C. For example, the "objc_msgSend_fixup_alloc" symbol is defined like this: .globl l_objc_msgSend_fixup_alloc .weak_definition l_objc_msgSend_fixup_alloc .section __DATA, __objc_msgrefs, coalesced .align 3 l_objc_msgSend_fixup_alloc: .quad _objc_msgSend_fixup .quad L_OBJC_METH_VAR_NAME_1 This is different from the "linker_private" linkage type, because it can't have the metadata defined with ".weak_definition". Currently only supported on Darwin platforms. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107433 91177308-0d34-0410-b5e6-96231b3b80d8 2010-07-01 21:55:59 +00:00			`; RUN: llvm-as < %s \| llvm-dis > %t1.ll`
			`; RUN: llvm-as %t1.ll -o - \| llvm-dis > %t2.ll`
			`; RUN: diff %t1.ll %t2.ll`

			`@foo = linker_private hidden global i32 0`
			`@bar = linker_private_weak hidden global i32 0`
Create the new linker type "linker_private_weak_def_auto". It's similar to "linker_private_weak", but it's known that the address of the object is not taken. For instance, functions that had an inline definition, but the compiler decided not to inline it. Note, unlike linker_private and linker_private_weak, linker_private_weak_def_auto may have only default visibility. The symbols are removed by the linker from the final linked image (executable or dynamic library). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111684 91177308-0d34-0410-b5e6-96231b3b80d8 2010-08-20 22:05:50 +00:00			`@qux = linker_private_weak_def_auto global i32 0`