commit 0d3e7be65f6ad6ec6c49fb8f99f88d0c0dd82b66
author Dan Gohman <gohman@apple.com> Fri Apr 16 17:15:02 2010 +0000
committer Dan Gohman <gohman@apple.com> Fri Apr 16 17:15:02 2010 +0000
tree cdfe46815d63f0fad23d9f2506dd86fd82f42a6d
parent 2008c183b287fe50d9252eba6d3eb179d3aa77b3

Avoid creating virtual registers for unused values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101480 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 7436bbe..9082fb6 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -834,7 +834,7 @@
             BI->dump();
           }
 
-          if (!BI->getType()->isVoidTy()) {
+          if (!BI->getType()->isVoidTy() && !BI->use_empty()) {
             unsigned &R = FuncInfo->ValueMap[BI];
             if (!R)
               R = FuncInfo->CreateRegForValue(BI);