X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FAllocationOrder.h;h=64ff2a7ce8367bbc24e4d7b2bcd8bf3c4f74bcc0;hb=b59d46efa521801a3d42fc5f53fedf3e81b070ce;hp=a5293f60a07729147446d0eed1691dcf7d98d7f5;hpb=f7999fe1cb2c2bdb0a4080efabb4743719ce45ca;p=oota-llvm.git

diff --git a/lib/CodeGen/AllocationOrder.h b/lib/CodeGen/AllocationOrder.h
index a5293f60a07..64ff2a7ce83 100644
--- a/lib/CodeGen/AllocationOrder.h
+++ b/lib/CodeGen/AllocationOrder.h
@@ -39,13 +39,18 @@ public:
                   const VirtRegMap &VRM,
                   const RegisterClassInfo &RegClassInfo);
 
+  /// Get the allocation order without reordered hints.
+  ArrayRef<MCPhysReg> getOrder() const { return Order; }
+
   /// Return the next physical register in the allocation order, or 0.
   /// It is safe to call next() again after it returned 0, it will keep
   /// returning 0 until rewind() is called.
-  unsigned next() {
+  unsigned next(unsigned Limit = 0) {
     if (Pos < 0)
       return Hints.end()[Pos++];
-    while (Pos < int(Order.size())) {
+    if (!Limit)
+      Limit = Order.size();
+    while (Pos < int(Limit)) {
       unsigned Reg = Order[Pos++];
       if (!isHint(Reg))
         return Reg;
@@ -53,6 +58,18 @@ public:
     return 0;
   }
 
+  /// As next(), but allow duplicates to be returned, and stop before the
+  /// Limit'th register in the RegisterClassInfo allocation order.
+  ///
+  /// This can produce more than Limit registers if there are hints.
+  unsigned nextWithDups(unsigned Limit) {
+    if (Pos < 0)
+      return Hints.end()[Pos++];
+    if (Pos < int(Limit))
+      return Order[Pos++];
+    return 0;
+  }
+
   /// Start over from the beginning.
   void rewind() { Pos = -int(Hints.size()); }