[llvm-branch-commits] [llvm-branch] r201945 - remove an unnecessary runtime operation

[Gabor Greif]

Author: ggreif
Date: Sat Feb 22 13:38:29 2014
New Revision: 201945

URL: http://llvm.org/viewvc/llvm-project?rev=201945&view=rev
Log:
remove an unnecessary runtime operation

Modified:
    llvm/branches/ggreif/waymark-64-new/lib/IR/Use.cpp

Modified: llvm/branches/ggreif/waymark-64-new/lib/IR/Use.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/ggreif/waymark-64-new/lib/IR/Use.cpp?rev=201945&r1=201944&r2=201945&view=diff
==============================================================================
--- llvm/branches/ggreif/waymark-64-new/lib/IR/Use.cpp (original)
+++ llvm/branches/ggreif/waymark-64-new/lib/IR/Use.cpp Sat Feb 22 13:38:29 2014
@@ -91,7 +91,7 @@ Use *Use::initTags(Use * const Start, Us
   while (Done < 20) {
     if (Start == Stop--)
       return Start;
-#   define TAG_AT(N, TAG) ((unsigned long)TAG << (N * 2))
+#   define TAG_AT(N, TAG) ((unsigned long)(TAG) << ((19 - (N)) * 2))
     static const unsigned long tags =
       TAG_AT(19, fullStopTag) | TAG_AT(18, oneDigitTag) | TAG_AT(17, stopTag) |
       TAG_AT(16, oneDigitTag) | TAG_AT(15, oneDigitTag) | TAG_AT(14, stopTag) |
@@ -101,7 +101,7 @@ Use *Use::initTags(Use * const Start, Us
       TAG_AT(4, oneDigitTag) | TAG_AT(3, oneDigitTag) | TAG_AT(2, oneDigitTag) |
       TAG_AT(1, oneDigitTag) | TAG_AT(0, stopTag);
 #   undef TAG_AT
-    new(Stop) Use(PrevPtrTag((tags >> (19 - Done++) * 2) & 0x3));
+    new(Stop) Use(PrevPtrTag((tags >> Done++ * 2) & 0x3));
   }
 
   ptrdiff_t Count = Done;