[llvm-commits] [llvm] r133959 - /llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp

[Andrew Trick]

Author: atrick
Date: Mon Jun 27 18:17:44 2011
New Revision: 133959

URL: http://llvm.org/viewvc/llvm-project?rev=133959&view=rev
Log:
indvars -disable-iv-rewrite: run RLEV after SimplifyIVUsers for
a bit more control over the order SCEVs are evaluated.

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

Modified: llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp?rev=133959&r1=133958&r2=133959&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp Mon Jun 27 18:17:44 2011
@@ -1158,8 +1158,12 @@
 
   // Create a rewriter object which we'll use to transform the code with.
   SCEVExpander Rewriter(*SE);
-  if (DisableIVRewrite)
+
+  // Eliminate redundant IV users.
+  if (DisableIVRewrite) {
     Rewriter.disableCanonicalMode();
+    SimplifyIVUsersNoRewrite(L, Rewriter);
+  }
 
   // Check to see if this loop has a computable loop-invariant execution count.
   // If so, this means that we can compute the final value of any expressions
@@ -1171,9 +1175,7 @@
     RewriteLoopExitValues(L, Rewriter);
 
   // Eliminate redundant IV users.
-  if (DisableIVRewrite)
-    SimplifyIVUsersNoRewrite(L, Rewriter);
-  else
+  if (!DisableIVRewrite)
     SimplifyIVUsers(Rewriter);
 
   // Compute the type of the largest recurrence expression, and decide whether