commit 854912aab0e19f3f2dc4c3e2e6ed150871deb846
author florian <florian@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Sun Sep 01 20:17:23 2013 +0000
committer florian <florian@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Sun Sep 01 20:17:23 2013 +0000
tree 1adfad2c813efdd3ee96851b89b4e2c5230b61ec
parent 55ce7b748cd0c8534865844f219685fdb8e96e59

Add an optimisation for Iop_Left64.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2747 8f6e269a-dfd6-0310-a8e1-e2731360e62c

priv/ir_opt.c

diff --git a/priv/ir_opt.c b/priv/ir_opt.c
index f368ce5..5982495 100644
--- a/priv/ir_opt.c
+++ b/priv/ir_opt.c
@@ -5065,6 +5065,11 @@
       if (is_Unop(aa, Iop_Left32))
          return IRExpr_Unop( Iop_Left32, aa->Iex.Unop.arg );
       break;
+   case Iop_Left64:
+      /* Left64( Left64(x) ) --> Left64(x) */
+      if (is_Unop(aa, Iop_Left64))
+         return IRExpr_Unop( Iop_Left64, aa->Iex.Unop.arg );
+      break;
    case Iop_32to1:
       /* 32to1( 1Uto32 ( x ) ) --> x */
       if (is_Unop(aa, Iop_1Uto32))