[llvm] r182490 - Add the IncludeSelf parameter to the MCSubRegIterator and MCSuperRegIterator

[Chad Rosier]

Author: mcrosier
Date: Wed May 22 12:26:26 2013
New Revision: 182490

URL: http://llvm.org/viewvc/llvm-project?rev=182490&view=rev
Log:
Add the IncludeSelf parameter to the MCSubRegIterator and MCSuperRegIterator
constructors.  No functional change.
Part of rdar://12906217

Modified:
    llvm/trunk/include/llvm/MC/MCRegisterInfo.h

Modified: llvm/trunk/include/llvm/MC/MCRegisterInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCRegisterInfo.h?rev=182490&r1=182489&r2=182490&view=diff
==============================================================================
--- llvm/trunk/include/llvm/MC/MCRegisterInfo.h (original)
+++ llvm/trunk/include/llvm/MC/MCRegisterInfo.h Wed May 22 12:26:26 2013
@@ -421,20 +421,28 @@ public:
 // aliasing registers. Use these iterator classes to traverse the lists.
 
 /// MCSubRegIterator enumerates all sub-registers of Reg.
+/// If IncludeSelf is set, Reg itself is included in the list.
 class MCSubRegIterator : public MCRegisterInfo::DiffListIterator {
 public:
-  MCSubRegIterator(unsigned Reg, const MCRegisterInfo *MCRI) {
+  MCSubRegIterator(unsigned Reg, const MCRegisterInfo *MCRI,
+                     bool IncludeSelf = false) {
     init(Reg, MCRI->DiffLists + MCRI->get(Reg).SubRegs);
-    ++*this;
+    // Initially, the iterator points to Reg itself.
+    if (!IncludeSelf)
+      ++*this;
   }
 };
 
 /// MCSuperRegIterator enumerates all super-registers of Reg.
+/// If IncludeSelf is set, Reg itself is included in the list.
 class MCSuperRegIterator : public MCRegisterInfo::DiffListIterator {
 public:
-  MCSuperRegIterator(unsigned Reg, const MCRegisterInfo *MCRI) {
+  MCSuperRegIterator(unsigned Reg, const MCRegisterInfo *MCRI,
+                     bool IncludeSelf = false) {
     init(Reg, MCRI->DiffLists + MCRI->get(Reg).SuperRegs);
-    ++*this;
+    // Initially, the iterator points to Reg itself.
+    if (!IncludeSelf)
+      ++*this;
   }
 };
 
@@ -443,7 +451,7 @@ public:
 class MCRegAliasIterator : public MCRegisterInfo::DiffListIterator {
 public:
   MCRegAliasIterator(unsigned Reg, const MCRegisterInfo *MCRI,
-                     bool IncludeSelf) {
+                     bool IncludeSelf = false) {
     init(Reg, MCRI->DiffLists + MCRI->get(Reg).Overlaps);
     // Initially, the iterator points to Reg itself.
     if (!IncludeSelf)