llvm/test/Feature/comdat.ll

; RUN: llvm-as < %s | llvm-dis | FileCheck %s

$f = comdat any
; CHECK: $f = comdat any

$f2 = comdat any
; CHECK-NOT: f2

@v = global i32 0, comdat $f
; CHECK: @v = global i32 0, comdat $f

@a = alias i32* @v
; CHECK: @a = alias i32* @v{{$}}

define void @f() comdat $f {
  ret void
}
; CHECK: define void @f() comdat $f

$i = comdat largest
@i = internal global i32 0, comdat $i
IR: Add COMDATs to the IR This new IR facility allows us to represent the object-file semantic of a COMDAT group. COMDATs allow us to tie together sections and make the inclusion of one dependent on another. This is required to implement features like MS ABI VFTables and optimizing away certain kinds of initialization in C++. This functionality is only representable in COFF and ELF, Mach-O has no similar mechanism. Differential Revision: http://reviews.llvm.org/D4178 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211920 91177308-0d34-0410-b5e6-96231b3b80d8 2014-06-27 18:19:56 +00:00			`; RUN: llvm-as < %s \| llvm-dis \| FileCheck %s`

			`$f = comdat any`
			`; CHECK: $f = comdat any`

			`$f2 = comdat any`
			`; CHECK-NOT: f2`

			`@v = global i32 0, comdat $f`
			`; CHECK: @v = global i32 0, comdat $f`

IR: Aliases don't belong to an explicit comdat Aliases inherit their comdat from their aliasee, they don't have an explicit comdat. This fixes PR20279. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212732 91177308-0d34-0410-b5e6-96231b3b80d8 2014-07-10 16:26:10 +00:00			`@a = alias i32* @v`
			`; CHECK: @a = alias i32* @v{{$}}`

IR: Add COMDATs to the IR This new IR facility allows us to represent the object-file semantic of a COMDAT group. COMDATs allow us to tie together sections and make the inclusion of one dependent on another. This is required to implement features like MS ABI VFTables and optimizing away certain kinds of initialization in C++. This functionality is only representable in COFF and ELF, Mach-O has no similar mechanism. Differential Revision: http://reviews.llvm.org/D4178 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211920 91177308-0d34-0410-b5e6-96231b3b80d8 2014-06-27 18:19:56 +00:00			`define void @f() comdat $f {`
			`ret void`
			`}`
			`; CHECK: define void @f() comdat $f`
IR: Allow comdats to be applied to globals with internal linkage Our verifier check for checking if a global has local linkage was too strict. Forbid private linkage but permit local linkage. Object file formats permit this and forbidding it prevents elimination of unused, internal, vftables under the MSVC ABI. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212900 91177308-0d34-0410-b5e6-96231b3b80d8 2014-07-13 04:56:11 +00:00
			`$i = comdat largest`
			`@i = internal global i32 0, comdat $i`