From: Dan Gohman <gohman@apple.com>
Date: Fri, 18 Jun 2010 00:08:30 +0000 (+0000)
Subject: Handle ext(ext(x)) -> ext(x) immediately, since it's simple.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=9e86a735682f3f62ff79291b4673e00cf5f2385b;p=oota-llvm.git

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
---

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index eac3865371d..49f31012a39 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2474,7 +2474,8 @@ SDValue SelectionDAG::getNode(unsigned Opcode, DebugLoc DL,
             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;