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Add -m16 option for using x86-*-*-code16 triple 

llvm-svn: 199754
This commit is contained in:
David Woodhouse 2014-01-21 17:19:44 +00:00
parent 5569381aed
commit 6996f6b9ec
3 changed files with 19 additions and 5 deletions
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1
clang/include/clang/Driver/Options.td
View File

@ -951,6 +951,7 @@ 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<m_Group>, Flags<[DriverOption, CoreOption]>;
def m32 : Flag<["-"], "m32">, Group<m_Group>, Flags<[DriverOption, CoreOption]>;
def mqdsp6_compat : Flag<["-"], "mqdsp6-compat">, Group<m_Group>, Flags<[DriverOption,CC1Option]>,
HelpText<"Enable hexagon-qdsp6 backward compatibility">;

19
clang/lib/Driver/Driver.cpp
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@ -1900,13 +1900,22 @@ static llvm::Triple computeTargetTriple(StringRef DefaultTargetTriple,
Target.getOS() == llvm::Triple::Minix)
return Target;
// Handle pseudo-target flags '-m32' and '-m64'.
if (Arg *A = Args.getLastArg(options::OPT_m32, options::OPT_m64)) {
// Handle pseudo-target flags '-m64', '-m32' and '-m16'.
if (Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_m32,
options::OPT_m16)) {
llvm::Triple::ArchType AT;
if (A->getOption().matches(options::OPT_m32))
AT = Target.get32BitArchVariant().getArch();
else
if (A->getOption().matches(options::OPT_m64))
AT = Target.get64BitArchVariant().getArch();
else if (A->getOption().matches(options::OPT_m32))
AT = Target.get32BitArchVariant().getArch();
else if (A->getOption().matches(options::OPT_m16)) {
AT = Target.get32BitArchVariant().getArch();
if (AT == llvm::Triple::x86)
Target.setEnvironment(llvm::Triple::CODE16);
else
AT = llvm::Triple::UnknownArch;
}
if (AT != llvm::Triple::UnknownArch)
Target.setArch(AT);
}

4
clang/test/Driver/x86_m16.c Normal file
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@ -0,0 +1,4 @@
// RUN: %clang -target i386 -m16 -### -c %s 2>&1 | FileCheck %s
// CHECK: Target: i386-{{.*}}-{{.*}}-code16