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loop.c (prescan_loop): Set loop_info->has_nonconst_call.

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* loop.c (prescan_loop): Set loop_info->has_nonconst_call.
	Use it instead of loop_info->has_call for scanning loop mems.
	(check_dbra_loop): Replace loop_info->has_call test with
	loop_info->has_nonconst_call.

From-SVN: r38699
This commit is contained in:
Michael Hayes 2001-01-05 02:51:18 +00:00 committed by Michael Hayes
parent 616af7ee28
commit 576d0b547d
2 changed files with 15 additions and 4 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2001-01-05 Michael Hayes <mhayes@redhat.com>
* loop.c (prescan_loop): Set loop_info->has_nonconst_call.
Use it instead of loop_info->has_call for scanning loop mems.
(check_dbra_loop): Replace loop_info->has_call test with
loop_info->has_nonconst_call.
2000-01-04 Matthew Hiller <hiller@redhat.com>
* config/sh/sh.h (EPILOGUE_USES): Recognize fpscr as epilogue-used

12
gcc/loop.c
View File

@ -2292,7 +2292,7 @@ count_nonfixed_reads (loop, x)
}
/* Scan a loop setting the elements `cont', `vtop', `loops_enclosed',
`has_call', `has_volatile', `has_tablejump',
`has_call', `has_nonconst_call', `has_volatile', `has_tablejump',
`unknown_address_altered', `unknown_constant_address_altered', and
`num_mem_sets' in LOOP. Also, fill in the array `mems' and the
list `store_mems' in LOOP. */
@ -2315,6 +2315,7 @@ prescan_loop (loop)
loop_info->has_indirect_jump = indirect_jump_in_function;
loop_info->pre_header_has_call = 0;
loop_info->has_call = 0;
loop_info->has_nonconst_call = 0;
loop_info->has_volatile = 0;
loop_info->has_tablejump = 0;
loop_info->has_multiple_exit_targets = 0;
@ -2357,7 +2358,10 @@ prescan_loop (loop)
else if (GET_CODE (insn) == CALL_INSN)
{
if (! CONST_CALL_P (insn))
loop_info->unknown_address_altered = 1;
{
loop_info->unknown_address_altered = 1;
loop_info->has_nonconst_call = 1;
}
loop_info->has_call = 1;
}
else if (GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN)
@ -2424,7 +2428,7 @@ prescan_loop (loop)
/* Now, rescan the loop, setting up the LOOP_MEMS array. */
if (/* An exception thrown by a called function might land us
anywhere. */
! loop_info->has_call
! loop_info->has_nonconst_call
/* We don't want loads for MEMs moved to a location before the
one at which their stack memory becomes allocated. (Note
that this is not a problem for malloc, etc., since those
@ -7462,7 +7466,7 @@ check_dbra_loop (loop, insn_count)
about all these things. */
if ((num_nonfixed_reads <= 1
&& ! loop_info->has_call
&& ! loop_info->has_nonconst_call
&& ! loop_info->has_volatile
&& reversible_mem_store
&& (bl->giv_count + bl->biv_count + loop_info->num_mem_sets