commit fab372880199de4a71b8e3ce8a6b8a53c85baa60
author Chris Lattner <sabre@nondot.org> Mon Sep 26 22:10:24 2005 +0000
committer Chris Lattner <sabre@nondot.org> Mon Sep 26 22:10:24 2005 +0000
tree 588a74d82b95c4005496e20f188f0519b56a243a
parent 3748147aaf73cba847ffad30a55de7e7df214b13

memoize the assert results


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23457 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/DAGISelEmitter.cpp

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index bd43909..27c0dfa 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -1230,8 +1230,11 @@
      << "  case ISD::EntryToken:       // These leaves remain the same.\n"
      << "    return N;\n"
      << "  case ISD::AssertSext:\n"
-     << "  case ISD::AssertZext:\n"
-     << "    return Select(N.getOperand(0));\n";
+     << "  case ISD::AssertZext: {\n"
+     << "    SDOperand Tmp0 = Select(N.getOperand(0));\n"
+     << "    if (!N.Val->hasOneUse()) CodeGenMap[N] = Tmp0;\n"
+     << "    return Tmp0;\n"
+     << "  }\n";
     
   // Group the patterns by their top-level opcodes.
   std::map<Record*, std::vector<PatternToMatch*>,