[Valgrind-developers] vex: r2417: Add folding rules for

[<sv...@va...>]

sewardj	2012-06-29 16:33:09 +0100 (Fri, 29 Jun 2012)

  New Revision: 2417

  Log:
    Add folding rules for
    CmpEQ32x4 V256to64_0 V256to64_1 V256to64_2 V256to64_3

  Modified files:
    trunk/priv/ir_opt.c


  Modified: trunk/priv/ir_opt.c (+14 -0)
===================================================================
--- trunk/priv/ir_opt.c	2012-06-29 16:28:24 +01:00 (rev 2416)
+++ trunk/priv/ir_opt.c	2012-06-29 16:33:09 +01:00 (rev 2417)
@@ -1163,6 +1163,7 @@
       case Iop_Or64:
          return IRExpr_Const(IRConst_U64(0xFFFFFFFFFFFFFFFFULL));
       case Iop_CmpEQ8x16:
+      case Iop_CmpEQ32x4:
          return IRExpr_Const(IRConst_V128(0xFFFF));
       default:
          ppIROp(op);
@@ -1508,6 +1509,18 @@
             break;
          }
 
+         /* Even stupider (although still correct ..) */
+         case Iop_V256to64_0: case Iop_V256to64_1:
+         case Iop_V256to64_2: case Iop_V256to64_3: {
+            UInt v256 = e->Iex.Unop.arg->Iex.Const.con->Ico.V256;
+            if (v256 == 0x00000000) {
+               e2 = IRExpr_Const(IRConst_U64(0));
+            } else {
+               goto unhandled;
+            }
+            break;
+         }
+
          default: 
             goto unhandled;
       }
@@ -2056,6 +2069,7 @@
             case Iop_CmpEQ64:
             case Iop_CmpEQ8x8:
             case Iop_CmpEQ8x16:
+            case Iop_CmpEQ32x4:
                if (sameIRExprs(env, e->Iex.Binop.arg1, e->Iex.Binop.arg2)) {
                   e2 = mkOnesOfPrimopResultType(e->Iex.Binop.op);
                   break;