Author: yug
Date: 2012-02-08 03:30:01 -0500 (Wed, 08 Feb 2012)
New Revision: 3868
Modified:
trunk/osprey/be/cg/x8664/ebo_special.cxx
Log:
fix for bug941.
under m32, at ebo post process phase, we disable the change of compare ops from
32bit to 8bit
if the source register is not byte addressable.
Code Review: Lai Jian-Xin.
Modified: trunk/osprey/be/cg/x8664/ebo_special.cxx
===================================================================
--- trunk/osprey/be/cg/x8664/ebo_special.cxx 2012-02-07 19:06:03 UTC (rev
3867)
+++ trunk/osprey/be/cg/x8664/ebo_special.cxx 2012-02-08 08:30:01 UTC (rev
3868)
@@ -3507,6 +3507,22 @@
return FALSE;
}
+ // open64.net bug941. under m32, at ebo post process phase
+ // if the new_top is set to 8bit operator and the GPR is not 8byte
addressable
+ // we disable the change of op.
+ if ( Is_Target_32bit() &&
+ EBO_in_peep &&
+ ( new_top == TOP_cmpi8 ||
+ new_top == TOP_test8 ||
+ new_top == TOP_testi8 ||
+ new_top == TOP_cmp8)) {
+ const REGISTER_SET regs =
REGISTER_SUBCLASS_members(ISA_REGISTER_SUBCLASS_m32_8bit_regs);
+ if ( TN_is_register(new_src0) && !REGISTER_SET_MemberP(regs,
TN_register(new_src0) ))
+ return FALSE;
+ if ( TN_is_register(new_src1) && !REGISTER_SET_MemberP(regs,
TN_register(new_src1) ))
+ return FALSE;
+ }
+
OP* new_op = Mk_OP( new_top, Rflags_TN(), new_src0, new_src1 );
Set_OP_unrolling( new_op, OP_unrolling ( op ) );
Set_OP_orig_idx( new_op, OP_map_idx ( op ) );
------------------------------------------------------------------------------
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