Author: yug
Date: 2012-02-15 03:40:23 -0500 (Wed, 15 Feb 2012)
New Revision: 3873
Modified:
trunk/osprey/be/cg/x8664/ebo_special.cxx
Log:
fix for bug949.
When we do OP changes, we don't
miss the check for movext ops on a byte register.
If the byte register is not addressable under -m32,
We cancel this change.
Code Review: Sun Chan.
Modified: trunk/osprey/be/cg/x8664/ebo_special.cxx
===================================================================
--- trunk/osprey/be/cg/x8664/ebo_special.cxx 2012-02-15 08:38:39 UTC (rev
3872)
+++ trunk/osprey/be/cg/x8664/ebo_special.cxx 2012-02-15 08:40:23 UTC (rev
3873)
@@ -2728,6 +2728,30 @@
if( new_op == NULL )
return FALSE;
+ // open64.net bug949. When we do OP changes, we don't
+ // miss the check for movext ops on a byte register.
+ // If the byte register is not addressable under -m32,
+ // We cancel this change.
+
+ if ( Is_Target_32bit() &&
+ EBO_in_peep &&
+ TOP_is_move_ext( OP_code(new_op ))) {
+
+ const TOP check_top = OP_code(new_op);
+ if (check_top == TOP_movsbl ||
+ check_top == TOP_movzbl ||
+ check_top == TOP_movsbq ||
+ check_top == TOP_movzbq ) {
+ const REGISTER reg = TN_register(OP_opnd(new_op, 0));
+ const REGISTER_SET regs =
+ REGISTER_SUBCLASS_members(ISA_REGISTER_SUBCLASS_m32_8bit_regs);
+
+ if( !REGISTER_SET_MemberP( regs, reg ) )
+ return FALSE;
+ }
+ }
+
+
Set_OP_unrolling( new_op, OP_unrolling(op) );
Set_OP_orig_idx( new_op, OP_map_idx(op) );
Set_OP_unroll_bb( new_op, OP_unroll_bb(op) );
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