commit 287e9bb7ae95950d91c96eb7899c028a46edbed4
author sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Thu Jul 29 16:12:41 2010 +0000
committer sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Thu Jul 29 16:12:41 2010 +0000
tree 946a1f1ea03d469bc3a3272a643d3ca7b7295f6d
parent 536fbabcc3770f42bb7370efd75e8e30e9a841c8

Add a folding rule for 32Sto64.


git-svn-id: svn://svn.valgrind.org/vex/trunk@1996 8f6e269a-dfd6-0310-a8e1-e2731360e62c

priv/ir_opt.c

diff --git a/priv/ir_opt.c b/priv/ir_opt.c
index 2b08efd..018cb51 100644
--- a/priv/ir_opt.c
+++ b/priv/ir_opt.c
@@ -1078,7 +1078,13 @@
                     0xFFFFFFFFULL 
                     & e->Iex.Unop.arg->Iex.Const.con->Ico.U32));
             break;
-
+         case Iop_32Sto64: {
+            /* signed */ Long s64 = e->Iex.Unop.arg->Iex.Const.con->Ico.U32;
+            s64 <<= 32;
+            s64 >>= 32;
+            e2 = IRExpr_Const(IRConst_U64((ULong)s64));
+            break;
+         }
          case Iop_CmpNEZ8:
             e2 = IRExpr_Const(IRConst_U1(toBool(
                     0 !=