[llvm-commits] [llvm] r56099 - in /llvm/trunk: include/llvm/Target/TargetRegisterInfo.h utils/TableGen/RegisterInfoEmitter.cpp

[Evan Cheng]

Author: evancheng
Date: Thu Sep 11 01:25:25 2008
New Revision: 56099

URL: http://llvm.org/viewvc/llvm-project?rev=56099&view=rev
Log:
Change getSubReg semantics. It now returns zero if the specified register doesn't have a subreg of the specified index.

Modified:
    llvm/trunk/include/llvm/Target/TargetRegisterInfo.h
    llvm/trunk/utils/TableGen/RegisterInfoEmitter.cpp

Modified: llvm/trunk/include/llvm/Target/TargetRegisterInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetRegisterInfo.h?rev=56099&r1=56098&r2=56099&view=diff

==============================================================================
--- llvm/trunk/include/llvm/Target/TargetRegisterInfo.h (original)
+++ llvm/trunk/include/llvm/Target/TargetRegisterInfo.h Thu Sep 11 01:25:25 2008
@@ -457,7 +457,8 @@
   virtual BitVector getReservedRegs(const MachineFunction &MF) const = 0;
 
   /// getSubReg - Returns the physical register number of sub-register "Index"
-  /// for physical register RegNo.
+  /// for physical register RegNo. Return zero if the sub-register does not
+  /// exist.
   virtual unsigned getSubReg(unsigned RegNo, unsigned Index) const = 0;
 
   //===--------------------------------------------------------------------===//

Modified: llvm/trunk/utils/TableGen/RegisterInfoEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/RegisterInfoEmitter.cpp?rev=56099&r1=56098&r2=56099&view=diff

==============================================================================
--- llvm/trunk/utils/TableGen/RegisterInfoEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/RegisterInfoEmitter.cpp Thu Sep 11 01:25:25 2008
@@ -655,12 +655,12 @@
   OS << "unsigned " << ClassName 
      << "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
      << "  switch (RegNo) {\n"
-     << "  default: abort(); break;\n";
+     << "  default:\n    return 0;\n";
   for (std::map<Record*, std::vector<std::pair<int, Record*> > >::iterator 
         I = SubRegVectors.begin(), E = SubRegVectors.end(); I != E; ++I) {
     OS << "  case " << getQualifiedName(I->first) << ":\n";
     OS << "    switch (Index) {\n";
-    OS << "    default: abort(); break;\n";
+    OS << "    default:\n      return 0;\n";
     for (unsigned i = 0, e = I->second.size(); i != e; ++i)
       OS << "    case " << (I->second)[i].first << ": return "
          << getQualifiedName((I->second)[i].second) << ";\n";