From: Chris Lattner <sabre@nondot.org>
Date: Wed, 19 Oct 2005 02:07:26 +0000 (+0000)
Subject: Add support for patterns that have physical registers in them.  Testcase:
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4c59309f591064f2207df5a98f41ed2d504b52da;p=oota-llvm.git

Add support for patterns that have physical registers in them.  Testcase:

def : Pat<(trunc G8RC:$in),
          (OR8To4 G8RC:$in, X0)>;

Even though this doesn't make any sense on PPC :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23815 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index 12ca95f7d0e..0f9d30450ef 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -1617,6 +1617,18 @@ CodeGenPatternResult(TreePatternNode *N, unsigned &Ctr,
   }
   
   if (N->isLeaf()) {
+    // If this is an explicit register reference, handle it.
+    if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
+      unsigned ResNo = Ctr++;
+      if (DI->getDef()->isSubClassOf("Register")) {
+        OS << "      SDOperand Tmp" << ResNo << " = CurDAG->getRegister("
+           << getQualifiedName(DI->getDef()) << ", MVT::"
+           << getEnumName(N->getType())
+           << ");\n";
+        return ResNo;
+      }
+    }
+    
     N->dump();
     assert(0 && "Unknown leaf type!");
     return ~0U;