[llvm-commits] [llvm] r108549 - /llvm/trunk/lib/VMCore/Use.cpp

[Gabor Greif]

Author: ggreif
Date: Fri Jul 16 15:35:19 2010
New Revision: 108549

URL: http://llvm.org/viewvc/llvm-project?rev=108549&view=rev
Log:
get the first few tags from a precomputed table (count can be increased if desired)

Modified:
    llvm/trunk/lib/VMCore/Use.cpp

Modified: llvm/trunk/lib/VMCore/Use.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Use.cpp?rev=108549&r1=108548&r2=108549&view=diff
==============================================================================
--- llvm/trunk/lib/VMCore/Use.cpp (original)
+++ llvm/trunk/lib/VMCore/Use.cpp Fri Jul 16 15:35:19 2010
@@ -86,6 +86,15 @@
 //===----------------------------------------------------------------------===//
 
 Use *Use::initTags(Use * const Start, Use *Stop, ptrdiff_t Done) {
+  while (Done < 6) {
+    if (Start == Stop--)
+      return Start;
+    static const PrevPtrTag tags[6] = { fullStopTag, oneDigitTag, stopTag,
+                                        oneDigitTag, oneDigitTag, stopTag };
+    Stop->Prev.setFromOpaqueValue(reinterpret_cast<Use**>(tags[Done++]));
+    Stop->Val = 0;
+  }
+
   ptrdiff_t Count = Done;
   while (Start != Stop) {
     --Stop;