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Add a new TargetNameParser class, which is useful for parsing options.

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Add two methods which are useful for autoselecting targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14748 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-11 03:59:46 +00:00
parent 71d24aab2d
commit cbc74123d8
1 changed files with 36 additions and 4 deletions
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40
include/llvm/Target/TargetMachineRegistry.h
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@ -17,12 +17,33 @@
#ifndef LLVM_TARGET_TARGETMACHINEREGISTRY_H
#define LLVM_TARGET_TARGETMACHINEREGISTRY_H
#include "Support/CommandLine.h"
namespace llvm {
class Module;
class TargetMachine;
class IntrinsicLowering;
struct TargetMachineRegistry {
struct Entry;
/// TargetMachineRegistry::getList - This static method returns the list of
/// target machines that are registered with the system.
static const Entry *getList() { return List; }
/// getClosestStaticTargetForModule - Given an LLVM module, pick the best
/// target that is compatible with the module. If no close target can be
/// found, this returns null and sets the Error string to a reason.
static const Entry *getClosestStaticTargetForModule(const Module &M,
std::string &Error);
/// getClosestTargetForJIT - Given an LLVM module, pick the best target that
/// is compatible with the current host and the specified module. If no
/// close target can be found, this returns null and sets the Error string
/// to a reason.
static const Entry *getClosestTargetForJIT(std::string &Error);
/// Entry - One instance of this struct is created for each target that is
/// registered.
struct Entry {
@ -46,10 +67,6 @@ namespace llvm {
const Entry *Next; // Next entry in the linked list.
};
/// TargetMachineRegistry::getList - This static method returns the list of
/// target machines that are registered with the system.
static const Entry *getList() { return List; }
private:
static const Entry *List;
};
@ -71,6 +88,21 @@ namespace llvm {
return new TargetMachineImpl(M, IL);
}
};
//===--------------------------------------------------------------------===//
/// TargetNameParser - This option can be used to provide a command line
/// option to choose among the various registered targets (commonly -march).
class TargetNameParser :
public cl::parser<const TargetMachineRegistry::Entry*> {
public:
void initialize(cl::Option &O) {
for (const TargetMachineRegistry::Entry *E =
TargetMachineRegistry::getList(); E; E = E->getNext())
Values.push_back(std::make_pair(E->Name,
std::make_pair(E, E->ShortDesc)));
cl::parser<const TargetMachineRegistry::Entry*>::initialize(O);
}
};
}
#endif