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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).

llvm-svn: 88819
This commit is contained in:
Daniel Dunbar 2009-11-14 22:04:54 +00:00
parent 18f845fccd
commit e13ada6a3b
2 changed files with 27 additions and 12 deletions
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35
clang/lib/Driver/Tools.cpp
View File

@ -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 @@ void Clang::AddX86TargetArgs(const ArgList &Args,
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) {

4
clang/test/Driver/clang-translation.c
View File

@ -10,6 +10,6 @@
// RUN: grep '"-o" .*clang-translation.*' %t.log
// RUN: grep '"--asm-verbose"' %t.log
// RUN: clang -ccc-host-triple i386-apple-darwin9 -### -S %s -o %t.s 2> %t.log
// RUN: grep '"--mcpu=yonah"' %t.log
// RUN: grep '"--mcpu" "yonah"' %t.log
// RUN: clang -ccc-host-triple x86_64-apple-darwin9 -### -S %s -o %t.s 2> %t.log
// RUN: grep '"--mcpu=core2"' %t.log
// RUN: grep '"--mcpu" "core2"' %t.log