-2003-04-25 Richard Henderson <rth@redhat.com>
+2003-04-25 Richard Henderson <rth@redhat.com>
+
+ * config/ia64/ia64.c (ia64_compute_frame_size): Allow inline asm
+ to clobber ar.pfs and ar.unat.
+ (ia64_expand_prologue): Force alloc instruction if ar.pfs saved;
+ fix test for spilling ar.pfs to the stack.
+
+2003-04-25 Richard Henderson <rth@redhat.com>
PR opt/10315
* config/rs6000/rs6000.c (rs6000_emit_move): Only elide proper
spill_size += 8;
n_spilled += 1;
}
+
+ if (regs_ever_live[AR_PFS_REGNUM])
+ {
+ SET_HARD_REG_BIT (mask, AR_PFS_REGNUM);
+ current_frame_info.reg_save_ar_pfs = find_gr_spill (1);
+ if (current_frame_info.reg_save_ar_pfs == 0)
+ {
+ extra_spill_size += 8;
+ n_spilled += 1;
+ }
+ }
}
/* Unwind descriptor hackery: things are most efficient if we allocate
}
/* If we're forced to use st8.spill, we're forced to save and restore
- ar.unat as well. */
- if (spilled_gr_p || cfun->machine->n_varargs)
+ ar.unat as well. The check for existing liveness allows inline asm
+ to touch ar.unat. */
+ if (spilled_gr_p || cfun->machine->n_varargs
+ || regs_ever_live[AR_UNAT_REGNUM])
{
regs_ever_live[AR_UNAT_REGNUM] = 1;
SET_HARD_REG_BIT (mask, AR_UNAT_REGNUM);
/* We don't need an alloc instruction if we've used no outputs or locals. */
if (current_frame_info.n_local_regs == 0
&& current_frame_info.n_output_regs == 0
- && current_frame_info.n_input_regs <= current_function_args_info.int_regs)
+ && current_frame_info.n_input_regs <= current_function_args_info.int_regs
+ && !TEST_HARD_REG_BIT (current_frame_info.mask, AR_PFS_REGNUM))
{
/* If there is no alloc, but there are input registers used, then we
need a .regstk directive. */
/* The alloc insn already copied ar.pfs into a general register. The
only thing we have to do now is copy that register to a stack slot
if we'd not allocated a local register for the job. */
- if (current_frame_info.reg_save_ar_pfs == 0
- && ! current_function_is_leaf)
+ if (TEST_HARD_REG_BIT (current_frame_info.mask, AR_PFS_REGNUM)
+ && current_frame_info.reg_save_ar_pfs == 0)
{
reg = gen_rtx_REG (DImode, AR_PFS_REGNUM);
do_spill (gen_movdi_x, ar_pfs_save_reg, cfa_off, reg);