commit 9e86a735682f3f62ff79291b4673e00cf5f2385b
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 2e2b412fbb4bfe976ff3150aecc0e3a6eba2e45a
parent 0a13b89b2480043f375b14fa25457c30cdea1e38

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106256 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAG.cpp

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index eac3865..49f3101 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/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;