Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752068AbaANX7L (ORCPT ); Tue, 14 Jan 2014 18:59:11 -0500 Received: from mga09.intel.com ([134.134.136.24]:2137 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751172AbaANX7I (ORCPT ); Tue, 14 Jan 2014 18:59:08 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,659,1384329600"; d="p7s'?scan'208";a="438910544" From: "Woodhouse, David" To: =?utf-8?B?SmFuLVNpbW9uIE3DtmxsZXI=?= CC: "llvmlinux@lists.linuxfoundation.org" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [llvmlinux] [PATCH 3/4] x86: Allow building 16-bit code with -m16 with toolchains that support it Thread-Topic: [llvmlinux] [PATCH 3/4] x86: Allow building 16-bit code with -m16 with toolchains that support it Thread-Index: AQHPEVz8rS5JWme4qEiZ4OJDc95xd5qE5nmA Date: Tue, 14 Jan 2014 23:59:03 +0000 Message-ID: <1389743943.30533.138.camel@shinybook.infradead.org> References: <1389180083-23249-1-git-send-email-David.Woodhouse@intel.com> <1389180083-23249-3-git-send-email-David.Woodhouse@intel.com> <3418146.9929lmqnex@aragorn.auenland.lan> In-Reply-To: <3418146.9929lmqnex@aragorn.auenland.lan> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.252.122.148] Content-Type: multipart/signed; micalg=sha-1; protocol="application/x-pkcs7-signature"; boundary="=-f3Wx52eB1Q3uVq8wjMha" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-f3Wx52eB1Q3uVq8wjMha Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, 2014-01-14 at 20:14 +0100, Jan-Simon M=C3=B6ller wrote: > Hi David, >=20 > what version of clang did you use btw ? This is LLVM HEAD + extra patches at git://, http://git.infradead.org/users/dwmw2/llvm.git and the following patch to clang HEAD: diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options= .td index 948b448..9eeace1 100644 --- a/include/clang/Driver/Options.td +++ b/include/clang/Driver/Options.td @@ -964,6 +964,7 @@ def lazy__framework : Separate<["-"], "lazy_framework">= , Flags<[LinkerInput]>; def lazy__library : Separate<["-"], "lazy_library">, Flags<[LinkerInput]>; def EL : Flag<["-"], "EL">, Flags<[DriverOption]>; def EB : Flag<["-"], "EB">, Flags<[DriverOption]>; +def m16 : Flag<["-"], "m16">, Group, Flags<[DriverOption, CoreOpt= ion]>; def m32 : Flag<["-"], "m32">, Group, Flags<[DriverOption, CoreOpt= ion]>; def mqdsp6_compat : Flag<["-"], "mqdsp6-compat">, Group, Flags<[D= riverOption,CC1Option]>, HelpText<"Enable hexagon-qdsp6 backward compatibility">; diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp index 253a083..8248149 100644 --- a/lib/Driver/Driver.cpp +++ b/lib/Driver/Driver.cpp @@ -1911,12 +1911,20 @@ static llvm::Triple computeTargetTriple(StringRef D= efaultTargetTriple, return Target; =20 // Handle pseudo-target flags '-m32' and '-m64'. - if (Arg *A =3D Args.getLastArg(options::OPT_m32, options::OPT_m64)) { + if (Arg *A =3D Args.getLastArg(options::OPT_m32, options::OPT_m64, optio= ns::OPT_m16)) { llvm::Triple::ArchType AT; if (A->getOption().matches(options::OPT_m32)) AT =3D Target.get32BitArchVariant().getArch(); - else + else if (A->getOption().matches(options::OPT_m64)) AT =3D Target.get64BitArchVariant().getArch(); + else if (A->getOption().matches(options::OPT_m16)) { + AT =3D Target.get32BitArchVariant().getArch(); + if (AT =3D=3D llvm::Triple::x86) + Target.setEnvironment(llvm::Triple::CODE16); + else + AT =3D llvm::Triple::UnknownArch; + } + if (AT !=3D llvm::Triple::UnknownArch) Target.setArch(AT); } --=20 1.8.3.1 --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com 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