[llvm-commits] [llvm] r95979 - /llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp

[Dan Gohman]

Author: djg
Date: Fri Feb 12 05:08:26 2010
New Revision: 95979

URL: http://llvm.org/viewvc/llvm-project?rev=95979&view=rev
Log:
Reverse the order for collecting the parts of an addrec. The order
doesn't matter, except that ScalarEvolution tends to need less time
to fold the results this way.

Modified:
    llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp?rev=95979&r1=95978&r2=95979&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp Fri Feb 12 05:08:26 2010
@@ -1902,10 +1902,10 @@
   } else if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(S)) {
     // Split a non-zero base out of an addrec.
     if (!AR->getStart()->isZero()) {
-      CollectSubexprs(AR->getStart(), C, Ops, SE);
       CollectSubexprs(SE.getAddRecExpr(SE.getIntegerSCEV(0, AR->getType()),
                                        AR->getStepRecurrence(SE),
                                        AR->getLoop()), C, Ops, SE);
+      CollectSubexprs(AR->getStart(), C, Ops, SE);
       return;
     }
   } else if (const SCEVMulExpr *Mul = dyn_cast<SCEVMulExpr>(S)) {