diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/loop.c | 12 |
2 files changed, 15 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8995ab8..ebb569b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 @@ -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 |