From dc464de9b0c9c873d32c882cef49e469b7814988 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 18 Dec 2005 15:45:51 +0000
Subject: [PATCH] More fixes for Selection of copyto/fromreg with a flag

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24829 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/DAGISelEmitter.cpp | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index b8077b361a5..9b4c4a65cf0 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -2353,7 +2353,7 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
      << "    SDOperand Chain = Select(N.getOperand(0));\n"
      << "    unsigned Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();\n"
      << "    MVT::ValueType VT = N.Val->getValueType(0);\n"
-     << "    if (N.getNumOperands() == 2) {\n"
+     << "    if (N.Val->getNumValues() == 2) {\n"
      << "      if (Chain == N.getOperand(0)) return N; // No change\n"
      << "      SDOperand New = CurDAG->getCopyFromReg(Chain, Reg, VT);\n"
      << "      CodeGenMap[N.getValue(0)] = New;\n"
@@ -2361,8 +2361,9 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
      << "      return New.getValue(N.ResNo);\n"
      << "    } else {\n"
      << "      SDOperand Flag;\n"
-     << "      if (N.getOperand(2).Val) Flag = Select(N.getOperand(2));\n"
-     << "      if (Chain == N.getOperand(0) && Flag == N.getOperand(2))\n"
+     << "      if (N.getNumOperands() == 3) Flag = Select(N.getOperand(2));\n"
+     << "      if (Chain == N.getOperand(0) &&\n"
+     << "          (N.getNumOperands() == 2 || Flag == N.getOperand(2)))\n"
      << "        return N; // No change\n"
      << "      SDOperand New = CurDAG->getCopyFromReg(Chain, Reg, VT, Flag);\n"
      << "      CodeGenMap[N.getValue(0)] = New;\n"
@@ -2373,21 +2374,19 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
      << "  }\n"
      << "  case ISD::CopyToReg: {\n"
      << "    SDOperand Chain = Select(N.getOperand(0));\n"
-     << "    SDOperand Reg = N.getOperand(1);\n"
+     << "    unsigned Reg = cast<RegisterSDNode>(N.getOperand(1))->getReg();\n"
      << "    SDOperand Val = Select(N.getOperand(2));\n"
      << "    SDOperand Result = N;\n"
-     << "    if (N.getNumOperands() == 3) {\n"
+     << "    if (N.Val->getNumValues() == 1) {\n"
      << "      if (Chain != N.getOperand(0) || Val != N.getOperand(2))\n"
-     << "        Result = CurDAG->getNode(ISD::CopyToReg, MVT::Other,\n"
-     << "                                 Chain, Reg, Val);\n"
+     << "        Result = CurDAG->getCopyToReg(Chain, Reg, Val);\n"
      << "      return CodeGenMap[N] = Result;\n"
      << "    } else {\n"
      << "      SDOperand Flag;\n"
-     << "      if (N.getOperand(3).Val) Flag = Select(N.getOperand(3));\n"
+     << "      if (N.getNumOperands() == 4) Flag = Select(N.getOperand(3));\n"
      << "      if (Chain != N.getOperand(0) || Val != N.getOperand(2) ||\n"
-     << "          Flag != N.getOperand(3))\n"
-     << "        Result = CurDAG->getNode(ISD::CopyToReg, MVT::Other,\n"
-     << "                                 Chain, Reg, Val, Flag);\n"
+     << "          (N.getNumOperands() == 4 && Flag != N.getOperand(3)))\n"
+     << "        Result = CurDAG->getCopyToReg(Chain, Reg, Val, Flag);\n"
      << "      CodeGenMap[N.getValue(0)] = Result;\n"
      << "      CodeGenMap[N.getValue(1)] = Result.getValue(1);\n"
      << "      return Result.getValue(N.ResNo);\n"