Add clang -mcpu=native support, patch by Roman Divacky, varioustweaks by me.
- We still need support for detecting the target features, since the name
doesn't actually do a good job of decribing what the CPU supports (for LLVM).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88819 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 7a77d56..657ebee 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -26,6 +26,7 @@
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Host.h"
#include "llvm/System/Process.h"
#include "InputInfo.h"
@@ -428,28 +429,42 @@
false))
CmdArgs.push_back("--no-implicit-float");
+ const char *CPUName = 0;
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
- // FIXME: We may need some translation here from the options gcc takes to
- // names the LLVM backend understand?
- CmdArgs.push_back("-mcpu");
- CmdArgs.push_back(A->getValue(Args));
- } else {
- // Select default CPU.
+ if (llvm::StringRef(A->getValue(Args)) == "native") {
+ // FIXME: Reject attempts to use -march=native unless the target matches
+ // the host.
+ //
+ // FIXME: We should also incorporate the detected target features for use
+ // with -native.
+ std::string CPU = llvm::sys::getHostCPUName();
+ if (!CPU.empty())
+ CPUName = Args.MakeArgString(CPU);
+ } else
+ CPUName = A->getValue(Args);
+ }
+ // Select the default CPU if none was given (or detection failed).
+ if (!CPUName) {
// FIXME: Need target hooks.
if (memcmp(getToolChain().getOS().c_str(), "darwin", 6) == 0) {
if (getToolChain().getArchName() == "x86_64")
- CmdArgs.push_back("--mcpu=core2");
+ CPUName = "core2";
else if (getToolChain().getArchName() == "i386")
- CmdArgs.push_back("--mcpu=yonah");
+ CPUName = "yonah";
} else {
if (getToolChain().getArchName() == "x86_64")
- CmdArgs.push_back("--mcpu=x86-64");
+ CPUName = "x86-64";
else if (getToolChain().getArchName() == "i386")
- CmdArgs.push_back("--mcpu=pentium4");
+ CPUName = "pentium4";
}
}
+ if (CPUName) {
+ CmdArgs.push_back("--mcpu");
+ CmdArgs.push_back(CPUName);
+ }
+
// FIXME: Use iterator.
for (ArgList::const_iterator
it = Args.begin(), ie = Args.end(); it != ie; ++it) {