* combine.c (try_combine): When setting elim_i2, check whether newi2pat
sets i2dest. When calling distribute_notes for i3dest_killed, pass
elim_i2 and elim_i1. When setting elim_i1, check if newi2pat
sets i1dest.
From-SVN: r16334
* combine.c (try_combine): Don't elim_i1 when it is used in i2src.
* combine.c (try_combine): When setting elim_i2, check whether newi2pat
sets i2dest. When calling distribute_notes for i3dest_killed, pass
elim_i2 and elim_i1.
Co-Authored-By: Jim Wilson <wilson@cygnus.com>
From-SVN: r16296
* flow.c (find_basic_blocks): If we delete the label for an
exception handler, remove it from the EH label list and remove
the EH_BEGIN/EH_END notes for that EH region.
From-SVN: r16265
* dwarf2out.c (output_call_frame_info): Use ASM_OUTPUT_ASCII to
output ASCII by default. Only use ASM_OUTPUT_DWARF_STRING if
flag_debug_asm is on.
(output_die, output_pubnames, output_line_info): Likewise.
From-SVN: r16251
* alias.c (init_alias_analysis): Add struct_value_incoming_rtx
and static_chain_rtx into the potential base values array if
they are registers.
Fixes bugs exposed by improved alias propagation code.
* alias.c (new_reg_base_value): New array of potential base values.
(unique_id): Now file scoped static.
(find_base_value, case REG): Return the value in reg_base_value
array for the REG if it exists. Else, return the value from
new_reg_base_value if copying args and REG is a hard register.
(find_base_value, case PLUS): If either operand of the PLUS is
a REG, try to get its base value. Handle base + index and
index + base.
(record_set): Use new_reg_base_value instead of reg_base_value.
(init_alias_analysis): Allocate space for new_reg_base_value too.
Rework code to iterate over the insns propagating base value
information until nothing changes.
Improve alias propagation significantly.
From-SVN: r16250
Fri Oct 31 01:45:31 1997 Jason Merrill <jason@yorick.cygnus.com>
* libgcc2.c (L_eh): Define __eh_pc.
Replace __eh_type with generic pointer __eh_info.
Fri Oct 31 01:47:57 1997 Jason Merrill <jason@yorick.cygnus.com>
Support for nested exceptions.
* tinfo2.cc (__is_pointer): New fn.
* exception.cc (struct cp_eh_info): Define.
(__cp_exception_info, __uncatch_exception): New fns.
(__cp_push_exception, __cp_pop_exception): New fns.
* except.c: Lose saved_throw_{type,value,cleanup,in_catch}.
Lose empty_fndecl.
(init_exception_processing): Likewise. __eh_pc is now external.
(push_eh_info): New fn.
(get_eh_{info,value,type,caught}): New fns.
(push_eh_cleanup): Just call __cp_pop_exception.
(expand_start_catch_block): Use push_eh_info. Start the eh region
sooner.
(expand_end_eh_spec): Use push_eh_info.
(expand_throw): Call __cp_push_exception to set up the exception info.
Just pass the destructor or 0 as the cleanup. Call __uncatch_exception
when we rethrow.
(expand_builtin_throw): Don't refer to empty_fndecl.
From-SVN: r16248
* mn10300.c (const_8bit_operand): New function.
(mask_ok_for_mem_btst): New funtion.
* mn10300.md (btst patterns with mem operands): Use new functions
to avoid creating btst instructions with invalid operands.
From-SVN: r16236
* global.c (global_alloc): Use xmalloc instead of alloca for
CONFLICTS, since max_allocno * allocno_row_words alone can be more
than 2.5Mb sometimes.
From-SVN: r16223
* alpha.md (reload_inqi): Check for MEM before strict_memory_address_p,
since any_memory_operand() allows pseudos during reload.
(reload_inhi, reload_outqi, reload_outhi): Likewise.
From-SVN: r16219
* fold-const.c (fold): For ((a * C1) / C3) or (((a * C1) + C2) / C3)
optimizations, look inside dividend to determine if the expression
can be simplified by using EXACT_DIV_EXPR.
From-SVN: r16216
* alpha.md (movqi, movhi): Make sure new insns created during reload
won't need reloading themselves.
(reload_inqi, reload_inhi, reload_outqi, reload_outhi): Likewise.
From-SVN: r16211
