From: Chris Lattner <sabre@nondot.org>
Date: Mon, 20 Feb 2006 06:38:35 +0000 (+0000)
Subject: Fix a problem on itanium with memset.  The value to set has been promoted to
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=dca7abed918c8191de6e258ddf394cf11de240f2;p=oota-llvm.git

Fix a problem on itanium with memset.  The value to set has been promoted to
i64 before this code, so zero_ext doesn't work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26290 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 5a45323c38a..67877c3d5f7 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1661,8 +1661,12 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
       const char *FnName = 0;
       if (Node->getOpcode() == ISD::MEMSET) {
         Args.push_back(std::make_pair(Tmp2, IntPtrTy));
-        // Extend the ubyte argument to be an int value for the call.
-        Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Tmp3);
+        // Extend the (previously legalized) ubyte argument to be an int value
+        // for the call.
+        if (Tmp3.getValueType() > MVT::i32)
+          Tmp3 = DAG.getNode(ISD::TRUNCATE, MVT::i32, Tmp3);
+        else
+          Tmp3 = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Tmp3);
         Args.push_back(std::make_pair(Tmp3, Type::IntTy));
         Args.push_back(std::make_pair(Tmp4, IntPtrTy));