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author | Jeffrey A Law <law@cygnus.com> | 1999-11-15 06:12:50 +0000 |
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committer | Jeff Law <law@gcc.gnu.org> | 1999-11-14 23:12:50 -0700 |
commit | 89e606c9661b3f674bebc198ece46e9ef1a41c65 (patch) | |
tree | 735e2967a477839c393b6afce3b1c00c55796967 /gcc/gcse.c | |
parent | cd9f6678b314661cdfde334387c1f06e9265c592 (diff) | |
download | gcc-89e606c9661b3f674bebc198ece46e9ef1a41c65.zip gcc-89e606c9661b3f674bebc198ece46e9ef1a41c65.tar.gz gcc-89e606c9661b3f674bebc198ece46e9ef1a41c65.tar.bz2 |
gcse.c (pre_expr_reaches_here_p): Kill CHECK_PRE_COM argument.
* gcse.c (pre_expr_reaches_here_p): Kill CHECK_PRE_COM argument.
All callers changed.
(pre_expr_reaches_here_p_work): Likewise.
(pre_edge_insert): No longer call pre_expr_reaches_here_p.
* lcm.c (compute_laterin): Fix initialization of LATER.
(compute_nearerout): Similarly for NEARER.
From-SVN: r30528
Diffstat (limited to 'gcc/gcse.c')
-rw-r--r-- | gcc/gcse.c | 31 |
1 files changed, 10 insertions, 21 deletions
@@ -596,8 +596,7 @@ static int one_cprop_pass PROTO ((int, int)); static void alloc_pre_mem PROTO ((int, int)); static void free_pre_mem PROTO ((void)); static void compute_pre_data PROTO ((void)); -static int pre_expr_reaches_here_p PROTO ((int, struct expr *, - int, int)); +static int pre_expr_reaches_here_p PROTO ((int, struct expr *, int)); static void insert_insn_end_bb PROTO ((struct expr *, int, int)); static void pre_insert_copy_insn PROTO ((struct expr *, rtx)); static void pre_insert_copies PROTO ((void)); @@ -640,7 +639,8 @@ static void delete_null_pointer_checks_1 PROTO ((int_list_ptr *, int *, static rtx process_insert_insn PROTO ((struct expr *)); static int pre_edge_insert PROTO ((struct edge_list *, struct expr **)); static int expr_reaches_here_p_work PROTO ((struct occr *, struct expr *, int, int, char *)); -static int pre_expr_reaches_here_p_work PROTO ((int, struct expr *, int, int, char *)); +static int pre_expr_reaches_here_p_work PROTO ((int, struct expr *, + int, char *)); /* Entry point for global common subexpression elimination. F is the first instruction in the function. */ @@ -4213,9 +4213,6 @@ compute_pre_data () VISITED is a pointer to a working buffer for tracking which BB's have been visited. It is NULL for the top-level call. - CHECK_PRE_COMP controls whether or not we check for a computation of - EXPR in OCCR_BB. - We treat reaching expressions that go through blocks containing the same reaching expression as "not reaching". E.g. if EXPR is generated in blocks 2 and 3, INSN is in block 4, and 2->3->4, we treat the expression in block @@ -4224,11 +4221,10 @@ compute_pre_data () the closest such expression. */ static int -pre_expr_reaches_here_p_work (occr_bb, expr, bb, check_pre_comp, visited) +pre_expr_reaches_here_p_work (occr_bb, expr, bb, visited) int occr_bb; struct expr *expr; int bb; - int check_pre_comp; char *visited; { edge pred; @@ -4244,8 +4240,7 @@ pre_expr_reaches_here_p_work (occr_bb, expr, bb, check_pre_comp, visited) /* Nothing to do. */ } /* Does this predecessor generate this expression? */ - else if ((!check_pre_comp && occr_bb == pred_bb) - || TEST_BIT (comp[pred_bb], expr->bitmap_index)) + else if (TEST_BIT (comp[pred_bb], expr->bitmap_index)) { /* Is this the occurrence we're looking for? Note that there's only one generating occurrence per block @@ -4261,8 +4256,7 @@ pre_expr_reaches_here_p_work (occr_bb, expr, bb, check_pre_comp, visited) else { visited[pred_bb] = 1; - if (pre_expr_reaches_here_p_work (occr_bb, expr, pred_bb, - check_pre_comp, visited)) + if (pre_expr_reaches_here_p_work (occr_bb, expr, pred_bb, visited)) return 1; } } @@ -4275,17 +4269,15 @@ pre_expr_reaches_here_p_work (occr_bb, expr, bb, check_pre_comp, visited) memory allocated for that function is returned. */ static int -pre_expr_reaches_here_p (occr_bb, expr, bb, check_pre_comp) +pre_expr_reaches_here_p (occr_bb, expr, bb) int occr_bb; struct expr *expr; int bb; - int check_pre_comp; { int rval; char * visited = (char *) xcalloc (n_basic_blocks, 1); - rval = pre_expr_reaches_here_p_work(occr_bb, expr, bb, check_pre_comp, - visited); + rval = pre_expr_reaches_here_p_work(occr_bb, expr, bb, visited); free (visited); @@ -4529,10 +4521,7 @@ pre_edge_insert (edge_list, index_map) /* Insert this expression on this edge if if it would reach the deleted occurence in BB. */ - if (!TEST_BIT (inserted[e], j) - && (bb == ENTRY_BLOCK - || pre_expr_reaches_here_p (bb, expr, - BLOCK_NUM (occr->insn), 0))) + if (!TEST_BIT (inserted[e], j)) { rtx insn; edge eg = INDEX_EDGE (edge_list, e); @@ -4660,7 +4649,7 @@ pre_insert_copies () continue; /* Or if the expression doesn't reach the deleted one. */ if (! pre_expr_reaches_here_p (BLOCK_NUM (avail->insn), expr, - BLOCK_NUM (occr->insn),1)) + BLOCK_NUM (occr->insn))) continue; /* Copy the result of avail to reaching_reg. */ |