[llvm-commits] [llvm] r116010 - /llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp

[Dan Gohman]

Author: djg
Date: Thu Oct  7 18:41:58 2010
New Revision: 116010

URL: http://llvm.org/viewvc/llvm-project?rev=116010&view=rev
Log:
Charge a formula for explicit multiplies on scaled registers too,
not just base registers.

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=116010&r1=116009&r2=116010&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/LoopStrengthReduce.cpp Thu Oct  7 18:41:58 2010
@@ -728,6 +728,9 @@
         (isa<SCEVUnknown>(cast<SCEVAddRecExpr>(Reg)->getStart()) ||
          isa<SCEVConstant>(cast<SCEVAddRecExpr>(Reg)->getStart()))))
     ++SetupCost;
+
+    NumIVMuls += isa<SCEVMulExpr>(Reg) &&
+                 Reg->hasComputableLoopEvolution(L);
 }
 
 /// RatePrimaryRegister - Record this register in the set. If we haven't seen it
@@ -762,9 +765,6 @@
       return;
     }
     RatePrimaryRegister(BaseReg, Regs, L, SE, DT);
-
-    NumIVMuls += isa<SCEVMulExpr>(BaseReg) &&
-                 BaseReg->hasComputableLoopEvolution(L);
   }
 
   if (F.BaseRegs.size() > 1)