[llvm-commits] [llvm] r114488 - /llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp

[Bob Wilson]

Author: bwilson
Date: Tue Sep 21 16:54:27 2010
New Revision: 114488

URL: http://llvm.org/viewvc/llvm-project?rev=114488&view=rev
Log:
Move a sign-extend or a zero-extend of a load to the same basic block as the
load when the type of the load is not legal, even if truncates are not free.
The load is going to be legalized to an extending load anyway.

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

Modified: llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp?rev=114488&r1=114487&r2=114488&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/CodeGenPrepare.cpp Tue Sep 21 16:54:27 2010
@@ -772,7 +772,8 @@
   // If the load has other users and the truncate is not free, this probably
   // isn't worthwhile.
   if (!LI->hasOneUse() &&
-      TLI && !TLI->isTruncateFree(I->getType(), LI->getType()))
+      TLI && TLI->isTypeLegal(TLI->getValueType(LI->getType())) &&
+      !TLI->isTruncateFree(I->getType(), LI->getType()))
     return false;
 
   // Check whether the target supports casts folded into loads.