From: Chris Lattner <sabre@nondot.org>
Date: Fri, 7 Jan 2005 07:49:05 +0000 (+0000)
Subject: This file is now dead.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d844d0128ac88b16b742dae277c5bc5c953857dc;p=oota-llvm.git

This file is now dead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19333 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
deleted file mode 100644
index 626d047fab4..00000000000
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-//===-- X86ISelPattern.cpp - A pattern matching inst selector for X86 -----===//
-// 
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
-//===----------------------------------------------------------------------===//
-//
-// This file defines a pattern matching instruction selector for X86.
-//
-//  FIXME: we could allocate one big array of unsigneds to use as the backing
-//         store for all of the nodes costs arrays.
-//
-//===----------------------------------------------------------------------===//
-
-/// NOTE: This whole selector is completely disabled.  This is only retained
-/// for historical interest and future work.  It will probably change 
-/// substantially in the future.
-#if 0
-
-#include "X86.h"
-#include "llvm/Pass.h"
-#include "llvm/Function.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/SSARegMap.h"
-#include "X86RegisterInfo.h"
-#include <iostream>
-
-// Include the generated instruction selector...
-#include "X86GenInstrSelector.inc"
-using namespace llvm;
-
-namespace {
-  struct ISel : public FunctionPass, SelectionDAGTargetBuilder {
-    TargetMachine &TM;
-    ISel(TargetMachine &tm) : TM(tm) {}
-    int VarArgsFrameIndex;              // FrameIndex for start of varargs area
-
-    bool runOnFunction(Function &Fn) {
-      MachineFunction &MF = MachineFunction::construct(&Fn, TM);
-      SelectionDAG DAG(MF, TM, *this);
-
-      std::cerr << "\n\n\n=== "
-                << DAG.getMachineFunction().getFunction()->getName() << "\n";
-
-      DAG.dump();
-      X86ISel(DAG).generateCode();
-      std::cerr << "\n\n\n";
-      return true;
-    }
-
-  public:  // Implementation of the SelectionDAGTargetBuilder class...
-    /// expandArguments - Add nodes to the DAG to indicate how to load arguments
-    /// off of the X86 stack.
-    void expandArguments(SelectionDAG &SD);
-    void expandCall(SelectionDAG &SD, CallInst &CI);
-  };
-}
-
-
-void ISel::expandArguments(SelectionDAG &SD) {
-
-  // Add DAG nodes to load the arguments...  On entry to a function on the X86,
-  // the stack frame looks like this:
-  //
-  // [ESP] -- return address
-  // [ESP + 4] -- first argument (leftmost lexically)
-  // [ESP + 8] -- second argument, if first argument is four bytes in size
-  //    ... 
-  //
-  MachineFunction &F = SD.getMachineFunction();
-  MachineFrameInfo *MFI = F.getFrameInfo();
-  const Function &Fn = *F.getFunction();
-  
-  unsigned ArgOffset = 0;   // Frame mechanisms handle retaddr slot
-  for (Function::const_aiterator I = Fn.abegin(), E = Fn.aend(); I != E; ++I) {
-    MVT::ValueType ObjectVT = SD.getValueType(I->getType());
-    unsigned ArgIncrement = 4;
-    unsigned ObjSize;
-    switch (ObjectVT) {
-    default: assert(0 && "Unhandled argument type!");
-    case MVT::i8:  ObjSize = 1;                break;
-    case MVT::i16: ObjSize = 2;                break;
-    case MVT::i32: ObjSize = 4;                break;
-    case MVT::i64: ObjSize = ArgIncrement = 8; break;
-    case MVT::f32: ObjSize = 4;                break;
-    case MVT::f64: ObjSize = ArgIncrement = 8; break;
-    }
-    // Create the frame index object for this incoming parameter...
-    int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
-    
-    // Create the SelectionDAG nodes corresponding to a load from this parameter
-    SelectionDAGNode *FIN = new SelectionDAGNode(ISD::FrameIndex, MVT::i32);
-    FIN->addValue(new ReducedValue_FrameIndex_i32(FI));
-
-    SelectionDAGNode *Arg
-      = new SelectionDAGNode(ISD::Load, ObjectVT, F.begin(), FIN);
-
-    // Add the SelectionDAGNodes to the SelectionDAG... note that there is no
-    // reason to add chain nodes here.  We know that no loads ore stores will
-    // ever alias these loads, so we are free to perform the load at any time in
-    // the function
-    SD.addNode(FIN);
-    SD.addNodeForValue(Arg, I);
-
-    ArgOffset += ArgIncrement;   // Move on to the next argument...
-  }
-
-  // If the function takes variable number of arguments, make a frame index for
-  // the start of the first vararg value... for expansion of llvm.va_start.
-  if (Fn.getFunctionType()->isVarArg())
-    VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
-}
-
-void ISel::expandCall(SelectionDAG &SD, CallInst &CI) {
-  assert(0 && "ISel::expandCall not implemented!");
-}
-
-/// createX86PatternInstructionSelector - This pass converts an LLVM function
-/// into a machine code representation using pattern matching and a machine
-/// description file.
-///
-FunctionPass *llvm::createX86PatternInstructionSelector(TargetMachine &TM) {
-  return new ISel(TM);  
-}
-
-#endif