H.J. reported a failure for PR64110 test.
Here is the patch solves it.
The patch was bootstrapped on x86/x86-64/arm.
Committed as rev. 218835.
2014-12-17 Vladimir Makarov <vmaka...@redhat.com>
* lra-constraints.c (process_alt_operands): Remove non
allocatable hard regs when considering
ira_prohibited_class_mode_regs.
Index: lra-constraints.c
===================================================================
--- lra-constraints.c (revision 218760)
+++ lra-constraints.c (working copy)
@@ -2280,22 +2280,28 @@ process_alt_operands (int only_alternati
not hold the mode value. */
&& ! HARD_REGNO_MODE_OK (ira_class_hard_regs
[this_alternative][0],
- GET_MODE
(*curr_id->operand_loc[nop]))
+ GET_MODE
(*curr_id->operand_loc[nop])))
+ {
+ HARD_REG_SET temp;
+
+ COPY_HARD_REG_SET (temp, this_alternative_set);
+ AND_COMPL_HARD_REG_SET (temp, lra_no_alloc_regs);
/* The above condition is not enough as the first
reg in ira_class_hard_regs can be not aligned for
multi-words mode values. */
- && hard_reg_set_subset_p (this_alternative_set,
- ira_prohibited_class_mode_regs
- [this_alternative]
- [GET_MODE
(*curr_id->operand_loc[nop])]))
- {
- if (lra_dump_file != NULL)
- fprintf
- (lra_dump_file,
- " alt=%d: reload pseudo for op %d "
- " can not hold the mode value -- refuse\n",
- nalt, nop);
- goto fail;
+ if (hard_reg_set_subset_p (temp,
+ ira_prohibited_class_mode_regs
+ [this_alternative]
+ [GET_MODE
(*curr_id->operand_loc[nop])]))
+ {
+ if (lra_dump_file != NULL)
+ fprintf
+ (lra_dump_file,
+ " alt=%d: reload pseudo for op %d "
+ " can not hold the mode value -- refuse\n",
+ nalt, nop);
+ goto fail;
+ }
}
/* Check strong discouragement of reload of non-constant
