Add a flag to indicate that an instruction is as cheap (or cheaper) than a move

[oota-llvm.git] / utils / TableGen / CodeGenInstruction.cpp

diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp
index 4d8693777dfedf14838fd2f5a92fdd63c6f2d29b..37c2069ec7279e3b8af3d4b8b75f5d963cc981af 100644 (file)
--- a/utils/TableGen/CodeGenInstruction.cpp
+++ b/utils/TableGen/CodeGenInstruction.cpp
@@ -76,7 +76,6 @@ static void ParseConstraints(const std::string &CStr, CodeGenInstruction *I) {
 
 CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   : TheDef(R), AsmString(AsmStr) {
-  Name      = R->getValueAsString("Name");
   Namespace = R->getValueAsString("Namespace");
 
   isReturn     = R->getValueAsBit("isReturn");
@@ -85,8 +84,8 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   isBarrier    = R->getValueAsBit("isBarrier");
   isCall       = R->getValueAsBit("isCall");
   isSimpleLoad = R->getValueAsBit("isSimpleLoad");
+  mayLoad      = R->getValueAsBit("mayLoad");
   mayStore     = R->getValueAsBit("mayStore");
-  isImplicitDef= R->getValueAsBit("isImplicitDef");
   bool isTwoAddress = R->getValueAsBit("isTwoAddress");
   isPredicable = R->getValueAsBit("isPredicable");
   isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
@@ -97,14 +96,15 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   usesCustomDAGSchedInserter = R->getValueAsBit("usesCustomDAGSchedInserter");
   hasCtrlDep   = R->getValueAsBit("hasCtrlDep");
   isNotDuplicable = R->getValueAsBit("isNotDuplicable");
+  hasSideEffects = R->getValueAsBit("hasSideEffects");
   mayHaveSideEffects = R->getValueAsBit("mayHaveSideEffects");
   neverHasSideEffects = R->getValueAsBit("neverHasSideEffects");
+  isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove");
   hasOptionalDef = false;
-  hasVariableNumberOfOperands = false;
+  isVariadic = false;
 
-  if (mayHaveSideEffects && neverHasSideEffects)
-    throw R->getName() +
-      ": cannot have both 'mayHaveSideEffects' and 'neverHasSideEffects' set!";
+  if (mayHaveSideEffects + neverHasSideEffects + hasSideEffects > 1)
+    throw R->getName() + ": multiple conflicting side-effect flags set!";
 
   DagInit *DI;
   try {
@@ -160,10 +160,10 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
       else if (Rec->isSubClassOf("OptionalDefOperand"))
         hasOptionalDef = true;
     } else if (Rec->getName() == "variable_ops") {
-      hasVariableNumberOfOperands = true;
+      isVariadic = true;
       continue;
     } else if (!Rec->isSubClassOf("RegisterClass") && 
-               Rec->getName() != "ptr_rc")
+               Rec->getName() != "ptr_rc" && Rec->getName() != "unknown")
       throw "Unknown operand class '" + Rec->getName() +
             "' in instruction '" + R->getName() + "' instruction!";
 
@@ -214,14 +214,6 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   }
 }
 
-/// getName - Return the contents of the instruction Name field if set,
-/// otherwise return the name of the def.
-std::string CodeGenInstruction::getName() const {
-  if (!Name.empty()) return Name;
-  return TheDef->getName();
-}
-
-
 /// getOperandNamed - Return the index of the operand with the specified
 /// non-empty name.  If the instruction does not have an operand with the
 /// specified name, throw an exception.