[llvm-commits] [llvm] r52849 - /llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

[Dan Gohman]

Author: djg
Date: Fri Jun 27 19:45:22 2008
New Revision: 52849

URL: http://llvm.org/viewvc/llvm-project?rev=52849&view=rev
Log:
When folding a bitcast into a load or store, preserve the alignment
information of the original load or store, which is checked to be
at least as good, and possibly better.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=52849&r1=52848&r2=52849&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri Jun 27 19:45:22 2008
@@ -3445,7 +3445,7 @@
     if (Align <= OrigAlign) {
       SDOperand Load = DAG.getLoad(VT, LN0->getChain(), LN0->getBasePtr(),
                                    LN0->getSrcValue(), LN0->getSrcValueOffset(),
-                                   LN0->isVolatile(), Align);
+                                   LN0->isVolatile(), OrigAlign);
       AddToWorkList(N);
       CombineTo(N0.Val, DAG.getNode(ISD::BIT_CONVERT, N0.getValueType(), Load),
                 Load.getValue(1));
@@ -4547,7 +4547,7 @@
         ((!AfterLegalize && !ST->isVolatile()) ||
          TLI.isOperationLegal(ISD::STORE, SVT)))
       return DAG.getStore(Chain, Value.getOperand(0), Ptr, ST->getSrcValue(),
-                          ST->getSrcValueOffset(), ST->isVolatile(), Align);
+                          ST->getSrcValueOffset(), ST->isVolatile(), OrigAlign);
   }
 
   // Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'