commit e1d45dace452a557a65efe5419903e8746f93fe3
author sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Fri Nov 12 00:13:21 2004 +0000
committer sewardj <sewardj@8f6e269a-dfd6-0310-a8e1-e2731360e62c> Fri Nov 12 00:13:21 2004 +0000
tree 4910d5a778dd5bf1a265a059222a9e93424c15b9
parent 6f33f7559ebb9efb12599f83794ee44a0d533dcf

Add a couple more constant folding rules.


git-svn-id: svn://svn.valgrind.org/vex/trunk@547 8f6e269a-dfd6-0310-a8e1-e2731360e62c

priv/ir/iropt.c

diff --git a/priv/ir/iropt.c b/priv/ir/iropt.c
index 9f692c9..b9372e2 100644
--- a/priv/ir/iropt.c
+++ b/priv/ir/iropt.c
@@ -342,6 +342,13 @@
           && e1->Iex.Tmp.tmp == e2->Iex.Tmp.tmp;
 }
 
+static Bool notBool ( Bool b )
+{
+   if (b == True) return False;
+   if (b == False) return True;
+   vpanic("notBool");
+}
+
 static IRExpr* fold_Expr ( IRExpr* e )
 {
    Int     shift;
@@ -415,6 +422,11 @@
                     ~ (e->Iex.Unop.arg->Iex.Const.con->Ico.U8)));
             break;
 
+         case Iop_Not1:
+            e2 = IRExpr_Const(IRConst_Bit(
+                    notBool(e->Iex.Unop.arg->Iex.Const.con->Ico.Bit)));
+            break;
+
          default: 
             goto unhandled;
       }
@@ -555,11 +567,17 @@
                        ((Int)(e->Iex.Binop.arg1->Iex.Const.con->Ico.U32)
                         <= (Int)(e->Iex.Binop.arg2->Iex.Const.con->Ico.U32))));
                break;
+
             case Iop_CmpLT32S:
                e2 = IRExpr_Const(IRConst_Bit(
                        ((Int)(e->Iex.Binop.arg1->Iex.Const.con->Ico.U32)
                         < (Int)(e->Iex.Binop.arg2->Iex.Const.con->Ico.U32))));
                break;
+            case Iop_CmpLT32U:
+               e2 = IRExpr_Const(IRConst_Bit(
+                       ((UInt)(e->Iex.Binop.arg1->Iex.Const.con->Ico.U32)
+                        < (UInt)(e->Iex.Binop.arg2->Iex.Const.con->Ico.U32))));
+               break;
 
             case Iop_32HLto64:
                e2 = IRExpr_Const(IRConst_U64(