llvm/lib/Target/Mips/MipsModuleISelDAGToDAG.cpp
Eric Christopher ec3b0fef11 Fundamentally change the MipsSubtarget replacement machinery:
a) Move the replacement level decision to the target machine.
b) Create additional subtargets at the TargetMachine level to
   cache and make replacement easy.
c) Make the mips16 features obvious.
d) Remove the override logic as it no longer does anything.
e) Have MipsModuleDAGToDAGISel take only the target machine.
f) Have the constant islands pass grab the current subtarget
   from the MachineFunction (via the TargetMachine) instead
   of caching it.
g) Unconditionally initialize TLOF.
h) Remove the old complicated subtarget based resetting and
   replace it with simple conditionals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213430 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-18 23:41:32 +00:00

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//===----------------------------------------------------------------------===//
// Instruction Selector Subtarget Control
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// This file defines a pass used to change the subtarget for the
// Mips Instruction selector.
//
//===----------------------------------------------------------------------===//
#include "MipsISelDAGToDAG.h"
#include "MipsModuleISelDAGToDAG.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#define DEBUG_TYPE "mips-isel"
namespace llvm {
bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
TM.resetSubtarget(&MF);
return false;
}
char MipsModuleDAGToDAGISel::ID = 0;
}
llvm::FunctionPass *llvm::createMipsModuleISelDag(MipsTargetMachine &TM) {
return new MipsModuleDAGToDAGISel(TM);
}