[llvm-commits] [llvm] r103139 - /llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp

[Dan Gohman]

Author: djg
Date: Wed May  5 19:02:14 2010
New Revision: 103139

URL: http://llvm.org/viewvc/llvm-project?rev=103139&view=rev
Log:
In bottom-up mode, defer the materialization of local constant values.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp?rev=103139&r1=103138&r2=103139&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp Wed May  5 19:02:14 2010
@@ -84,6 +84,17 @@
   if (Reg != 0)
     return Reg;
 
+  // In bottom-up mode, just create the virtual register which will be used
+  // to hold the value. It will be materialized later.
+  if (IsBottomUp) {
+    Reg = createResultReg(TLI.getRegClassFor(VT));
+    if (isa<Instruction>(V))
+      ValueMap[V] = Reg;
+    else
+      LocalValueMap[V] = Reg;
+    return Reg;
+  }
+
   return materializeRegForValue(V, VT);
 }