* loop.c (strength_reduce): Do not clear NOT_EVERY_ITERATION at the
last CODE_LABEL in a loop if we have previously passed a jump
to the top of the loop.
From-SVN: r27125
Sun May 23 20:31:16 1999 Jeffrey A Law (law@cygnus.com)
* loop.c (strength_reduce): Grow reg_single_usage as needed.
Sun May 23 10:13:20 1999 David O'Brien <obrien@FreeBSD.org>
* i386/freebsd-elf.h (LINK_SPEC): Change -static to -Bstatic.
Also remove a useless comment.
Sun May 23 10:05:23 1999 Jerry Quinn <jquinn@nortelnetworks.com>
* pa.md (negdf2,negsf2): Use fneg instead of fsub on pa 2.0.
From-SVN: r27111
* cccp.c (create_definition): Cast to U_CHAR* when assigning to one.
* cppfiles.c (read_and_prescan): Likewise.
Start a #define in column 0.
* cpplib.c (cpp_define): Cast to U_CHAR* when assigning to one.
(cpp_push_buffer): Likewise for cpp_buffer*.
(do_include): Change the type of `fbeg' and `fend' to unsigned char*.
(do_endif): Cast to char* when assigning to one.
(do_assert): Likewise.
(do_unassert): Likewise.
(cpp_read_check_assertion): Change the type of `name' to U_CHAR*.
Don't do unnecessary cast to char* anymore.
* genrecog.c (make_insn_sequence): Cast to char** when assigning
to one. Cast the first argument of bzero to PTR.
* loop.c (strength_reduce): Remove unused variable `note'.
* reload1.c (new_insn_chain): Cast to struct insn_chain* when
assigning to one.
* rtl.c (copy_rtx): Use memcpy instead of bcopy.
From-SVN: r25860
* loop.h (loop_insn_first_p): Declare.
* loop.c (loop_insn_first_p): No longer static.
* unroll.c (iteration_info) Fix comparison to
reg_iv_type->num_elements.
Before accessing reg_biv_class, check index against
max_reg_before_loop.
Fix and enable code for giv iterators.
(loop_iterations): Compare with reg_iv_type->num_elements instead
of with max_reg_before_loop.
From-SVN: r25401
* loop.c (libcall_other_regs): Make extern.
* rtl.h (find_last_value): Add parameter to prototype.
(libcall_other_reg): Add extern declaration.
* rtlanal.c (find_last_value): Add another parameter to allow
a definition using a hardware register to be found as well.
From-SVN: r25378
* rtlanal.c (insn_first_p): Fix return value for insn == reference.
* loop.c (strength_reduce, check_final_value, check_dbra_loop):
Use loop_insn_first_p.
From-SVN: r25321
* loop.c (strength_reduce): For derived givs, replace the
giv this was derived from with its new_reg.
(recombine_givs): Don't set new_reg for derived giv.
And don't print it, print SUM instead.
From-SVN: r25289
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* loop.c (mark_loop_jump): Handle LO_SUM. If we encounter something
we do not understand, mark the loop and containing loops as invalid.
From-SVN: r25215
* loop.c (combine_givs_used_by_other): Delete.
(combine_givs_benefit_from): Delete.
(combine_givs): Deny combination of givs only used once. Simplify
code with the death of combine_givs_benefit_from.
From-SVN: r25183
* loop.c (reg_single_usage): New file-scope variable ...
(scan_loop): ... moved out of here. Always initialize.
Test loop_has_call instead of reg_single_usage not zero.
Free reg_single_usage after strength reduction.
(count_loop_regs_set): Assume single_usage non-zero.
(combine_givs_used_by_other): Test reg_single_usage.
(load_mems_and_recount_loop_regs_set): Remove reg_single_usage
as a parameter. Assume non-zero.
From-SVN: r25098
* loop.c (first_loop_store_insn): New file-scope variable.
(prescan_loop): Set it.
(check_dbra_loop): Check if a store depends on a register
that is set after the store.
From-SVN: r25034
* loop.c (scan_loop): New argument loop_cont. Changed caller.
(strength_reduce): New argument loop_cont. Changed caller.
Before clearing not_every_iteration after a label, check if
we are not already past LOOP_CONT.
From-SVN: r25026
* loop.h (express_from): Declare.
(struct induction): Replace derived flag with derived_from pointer.
* loop.c (strength_reduce, record_giv, recombine_givs): Likewise.
(express_from): No longer static.
* unroll.c (find_splittable_givs): Replace derived with derived_from.
When processing an address giv with which another giv has been
combined that has also been derived from a third giv, handle like
having combined with the third giv.
Set splittable_regs_updates appropriately for derived givs.
From-SVN: r25007
* (recombine_givs): Don't use a giv that's likely to be dead to
derive others.
* loop.c (recombine_givs): Fix test for lifetime overlaps / loop
wrap around when deriving givs.
From-SVN: r24967
* toplev.c (notice, fnotice): Check ANSI_PROTOTYPES, not __STDC__,
when declaring arguments and calling va_arg() to initialize them.
* collect2.c (notice): Likewise.
* loop.c (find_life_end): Use PROTO() macro in the prototype.
From-SVN: r24905
* loop.c (recombine_givs): New parameter unroll_p. If set, don't
generate complex adds. Changed caller.
Don't generate adds that cost more than the original one.
(strength_reduce): Warning fixes.
From-SVN: r24895
* rtl.h (insn_first_p): Declare.
* rtlanal.c (insn_first_p): New function.
* loop.h (varray.h): Include.
(struct induction): Change combined_with to unsigned.
New members derived, ix and last_use.
(reg_iv_type, reg_iv_info): Now varray_type. All references changed.
(REG_IV_TYPE, REG_IV_INFO): Define.
(first_increment_giv, last_increment_giv): Declare.
* loop.c (loop_number_loop_cont): New static variable.
(loop_number_cont_dominator): Likewise.
(reg_iv_type, reg_iv_info): Now varray_type.
(first_increment_giv, last_increment_giv): New variables.
(compute_luids, verify_dominator, find_life_end): New functions.
(cmp_recombine_givs_stats, recombine_givs): Likewise.
(loop_optimize): Allocate loop_number_loop_cont and
loop_number_cont_dominator. Use compute_luids.
(find_and_verify_loops): Initialize loop_number_loop_cont and
loop_number_cont_dominator.
(strength_reduce): Try to find bivs that can be expressed as givs
of another biv, and to convert biv increments into givs.
Call recombine_givs. Handle derived givs.
(record_biv): New argument location. All callers changed.
(record_giv): Initialize derived and last_use fields.
(basic_induction_var): New argument location. All callers changed.
(combine_givs): Don't combine a DEST_REG giv with a DEST_ADDR giv.
Increment combined_with instead of setting to 1.
* unroll.c (derived_regs): New static variable.
(unroll_loop): Initialize it.
Allocate local_regno according to max_reg_num.
(copy_loop_body): Cope with derived givs.
(find_splittable_givs): Check for Givs made from biv increments.
Set derived_regs for givs.
* Makefile.in (stmt.o, loop.o, unroll.o): Depend on loop.h .
From-SVN: r24889
