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Add support for gcc-compatible -mmfcrf -mno-mfcrf PPC options 

gcc provides -mmfcrf and -mno-mfcrf for controlling what we call
the mfocrf target feature. Also, PPC is now making use of the
static function AddTargetFeature used by the Mips Driver code.

llvm-svn: 178227
This commit is contained in:
Hal Finkel 2013-03-28 08:38:53 +00:00
parent c3c725aae3
commit 279ca4d608
4 changed files with 19 additions and 5 deletions
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2
clang/include/clang/Driver/Options.td
View File

@ -832,6 +832,8 @@ def mabi_EQ : Joined<["-"], "mabi=">, Group<m_Group>;
def march_EQ : Joined<["-"], "march=">, Group<m_Group>;
def maltivec : Flag<["-"], "maltivec">, Alias<faltivec>;
def mno_altivec : Flag<["-"], "mno-altivec">, Alias<fno_altivec>;
def mmfcrf : Flag<["-"], "mmfcrf">, Group<m_Group>;
def mno_mfcrf : Flag<["-"], "mno-mfcrf">, Group<m_Group>;
def mqpx : Flag<["-"], "mqpx">, Group<m_Group>;
def mno_qpx : Flag<["-"], "mno-qpx">, Group<m_Group>;
def mcmodel_EQ : Joined<["-"], "mcmodel=">, Group<m_Group>;

2
clang/lib/Basic/Targets.cpp
View File

@ -1029,7 +1029,7 @@ void PPCTargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
bool PPCTargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
StringRef Name,
bool Enabled) const {
if (Name == "altivec" || Name == "qpx") {
if (Name == "altivec" || Name == "mfocrf" || Name == "qpx") {
Features[Name] = Enabled;
return true;
}

14
clang/lib/Driver/Tools.cpp
View File

@ -1097,11 +1097,17 @@ void Clang::AddPPCTargetArgs(const ArgList &Args,
}
// Allow override of the Altivec feature.
if (Args.hasFlag(options::OPT_fno_altivec, options::OPT_faltivec, false)) {
CmdArgs.push_back("-target-feature");
CmdArgs.push_back("-altivec");
}
AddTargetFeature(Args, CmdArgs,
options::OPT_faltivec, options::OPT_fno_altivec,
"altivec");
// Note that gcc calls this mfcrf and LLVM calls this mfocrf.
AddTargetFeature(Args, CmdArgs,
options::OPT_mmfcrf, options::OPT_mno_mfcrf,
"mfocrf");
// It is really only possible to turn qpx off because turning qpx on is tied
// to using the a2q CPU.
if (Args.hasFlag(options::OPT_mno_qpx, options::OPT_mqpx, false)) {
CmdArgs.push_back("-target-feature");
CmdArgs.push_back("-qpx");

6
clang/test/Driver/ppc-features.cpp
View File

@ -68,3 +68,9 @@
// RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-qpx -mqpx -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-QPX %s
// CHECK-QPX-NOT: "-target-feature" "-qpx"
// RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-mfcrf -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-NOMFCRF %s
// CHECK-NOMFCRF: "-target-feature" "-mfocrf"
// RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-mfcrf -mmfcrf -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-MFCRF %s
// CHECK-MFCRF: "-target-feature" "+mfocrf"