commit 0883789ec4a1689b272fec5ab6c6a73ec1fc6dc6
author Dan Gohman <gohman@apple.com> Fri Jun 18 00:08:30 2010 +0000
committer Dan Gohman <gohman@apple.com> Fri Jun 18 00:08:30 2010 +0000
tree a6e9437e1c17cc5645f21620dbac3be3dde018ec
parent 30d7a51d6c30a8472c696ec30da28dc432db4322

Handle ext(ext(x)) -> ext(x) immediately, since it's simple.

llvm-svn: 106256

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index eac3865..49f3101 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2474,7 +2474,8 @@
             VT.getVectorNumElements() ==
             Operand.getValueType().getVectorNumElements()) &&
            "Vector element count mismatch!");
-    if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND)
+    if (OpOpcode == ISD::ZERO_EXTEND || OpOpcode == ISD::SIGN_EXTEND ||
+        OpOpcode == ISD::ANY_EXTEND)
       // (ext (zext x)) -> (zext x)  and  (ext (sext x)) -> (sext x)
       return getNode(OpOpcode, DL, VT, Operand.getNode()->getOperand(0));
     break;