[llvm-commits] [llvm] r43262 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

[Bill Wendling]

Author: void
Date: Tue Oct 23 16:30:25 2007
New Revision: 43262

URL: http://llvm.org/viewvc/llvm-project?rev=43262&view=rev
Log:
Lowering a memcpy to the stack is killing PPC. The ARM and X86 backends already
have their own custom memcpy lowering code. This code needs to be factored out
into a target-independent lowering method with hooks to the backend. In the
meantime, just call memcpy if we're trying to copy onto a stack.

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

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp?rev=43262&r1=43261&r2=43262&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Tue Oct 23 16:30:25 2007
@@ -4302,6 +4302,10 @@
       break;
     }
     case ISD::MEMCPY: {
+      // FIXME: Disabling memcpy lowering for copying onto the stack.
+      if (Op1.getOpcode() == ISD::FrameIndex)
+        break;
+
       if (MeetsMaxMemopRequirement(MemOps, TLI.getMaxStoresPerMemcpy(),
                                    Size->getValue(), Align, TLI)) {
         unsigned NumMemOps = MemOps.size();