OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* tree-if-conv.c: Spell check comments and clean up whitespace. 

From-SVN: r87101
This commit is contained in:
Andreas Jaeger 2004-09-05 12:54:26 +02:00 committed by Andreas Jaeger
parent 8b11a64cd9
commit 61b5f21009
2 changed files with 87 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/ChangeLog
View File

@ -1,3 +1,7 @@
2004-09-05 Andreas Jaeger <aj@suse.de>
* tree-if-conv.c: Spell check comments and clean up whitespace.
2004-09-05 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
* tree-ssa-loop-ivopts.c: New file.

25
gcc/tree-if-conv.c
View File

@ -27,7 +27,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
o Decide if a loop is if-convertable or not.
o Walk all loop basic blocks in breadth first order (BFS order).
o Remove conditional statements (at the end of basic block)
and propogate condition into destination basic blcoks'
and propagate condition into destination basic blocks'
predicate list.
o Replace modify expression with conditional modify expression
using current basic block's condition.
@ -136,7 +136,7 @@ static basic_block *ifc_bbs;
false. If false is returned then loop remains unchanged.
FOR_VECTORIZER is a boolean flag. It indicates whether if-conversion is used
for vectorizer or not. If it is used for vectorizer, additional checks are
used. (Vectorization checks are not yet imlemented). */
used. (Vectorization checks are not yet implemented). */
bool
tree_if_conversion (struct loop *loop, bool for_vectorizer)
@ -175,7 +175,7 @@ tree_if_conversion (struct loop *loop, bool for_vectorizer)
cond = bb->aux;
/* Process all statements in this basic block.
Remove conditional expresion, if any, and annotate
Remove conditional expression, if any, and annotate
destination basic block(s) appropriately. */
for (itr = bsi_start (bb); !bsi_end_p (itr); /* empty */)
{
@ -265,7 +265,7 @@ tree_if_convert_stmt (struct loop * loop, tree t, tree cond,
/* STMT is COND_EXPR. Update two destination's predicate list.
Remove COND_EXPR, if it is not the loop exit condition. Otherwise
update loop exit condition appropriatly. BSI is the iterator
update loop exit condition appropriately. BSI is the iterator
used to traverse statement list. STMT is part of loop LOOP. */
static void
@ -307,7 +307,7 @@ tree_if_convert_cond_expr (struct loop *loop, tree stmt, tree cond,
add_to_dst_predicate_list (loop, else_clause, cond, c2, bsi);
}
/* Now this conditional statement is redundent. Remove it.
/* Now this conditional statement is redundant. Remove it.
But, do not remove exit condition! Update exit condition
using new condition. */
if (!bb_with_exit_edge_p (bb_for_stmt (stmt)))
@ -424,7 +424,7 @@ if_convertable_modify_expr_p (struct loop *loop, basic_block bb, tree m_expr)
/* Return true, iff STMT is if-convertable.
Statement is if-convertable if,
- It is if-converatable MODIFY_EXPR
- It is if-convertable MODIFY_EXPR
- IT is LABEL_EXPR, GOTO_EXPR or COND_EXPR.
STMT is inside block BB, which is inside loop LOOP. */
@ -462,7 +462,7 @@ if_convertable_stmt_p (struct loop *loop, basic_block bb, tree stmt)
/* Return true, iff BB is if-convertable.
Note: This routine does _not_ check basic block statements and phis.
Basic block is not if-converatable if,
Basic block is not if-convertable if,
- Basic block is non-empty and it is after exit block (in BFS order).
- Basic block is after exit block but before latch.
- Basic block edge(s) is not normal.
@ -493,7 +493,7 @@ if_convertable_bb_p (struct loop *loop, basic_block bb, bool exit_bb_seen)
}
}
/* Be less adveturous and handle only normal edges. */
/* Be less adventurous and handle only normal edges. */
for (e = bb->succ; e; e = e->succ_next)
if (e->flags &
(EDGE_ABNORMAL_CALL | EDGE_EH | EDGE_ABNORMAL | EDGE_IRREDUCIBLE_LOOP))
@ -541,7 +541,7 @@ if_convertable_loop_p (struct loop *loop, bool for_vectorizer ATTRIBUTE_UNUSED)
if (loop->num_nodes <= 2)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "less thant 2 basic blocks\n");
fprintf (dump_file, "less than 2 basic blocks\n");
return false;
}
@ -708,7 +708,7 @@ find_phi_replacement_condition (basic_block bb, tree *cond,
switch_args = false;
}
/* Create temp. for the condition. Vectorizier prefers to have gimple
/* Create temp. for the condition. Vectorizer prefers to have gimple
value as condition. Various targets use different means to communicate
condition in vector compare operation. Using gimple value allows compiler
to emit vector compare and select RTL without exposing compare's result. */
@ -778,12 +778,12 @@ replace_phi_with_cond_modify_expr (tree phi, tree cond, bool switch_args,
arg_1 = PHI_ARG_DEF (phi, 1);
}
/* Build new RHS using selected condtion and arguments. */
/* Build new RHS using selected condition and arguments. */
rhs = build (COND_EXPR, TREE_TYPE (PHI_RESULT (phi)),
unshare_expr (cond), unshare_expr (arg_0),
unshare_expr (arg_1));
/* Create new MODIFY expresstion using RHS. */
/* Create new MODIFY expression using RHS. */
new_stmt = build (MODIFY_EXPR, TREE_TYPE (PHI_RESULT (phi)),
unshare_expr (PHI_RESULT (phi)), rhs);
@ -1099,4 +1099,3 @@ struct tree_opt_pass pass_if_conversion =
| TODO_verify_stmts
| TODO_verify_flow /* todo_flags_finish */
};