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

loop-iv: Add missing calls to `onlyjump_p'

Browse Source 
Ignore jumps that have side effects in loop processing as pasting the
body of a loop multiple times within is semantically equivalent to jump
deletion (between the iterations unrolled) even if we do not physically
delete the jump RTL insn.

	gcc/
	* loop-iv.c (simplify_using_initial_values): Only process jumps
	that match `onlyjump_p'.
	(check_simple_exit): Likewise.
This commit is contained in:
Maciej W. Rozycki 2020-12-05 18:26:24 +00:00
parent 94f336768e
commit a2bd4e52cf
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/loop-iv.c
View File

@ -1936,7 +1936,7 @@ simplify_using_initial_values (class loop *loop, enum rtx_code op, rtx *expr)
while (1)
{
insn = BB_END (e->src);
if (any_condjump_p (insn))
if (any_condjump_p (insn) && onlyjump_p (insn))
{
rtx cond = get_condition (BB_END (e->src), NULL, false, true);
@ -2887,7 +2887,7 @@ check_simple_exit (class loop *loop, edge e, class niter_desc *desc)
return;
/* It must end in a simple conditional jump. */
if (!any_condjump_p (BB_END (exit_bb)))
if (!any_condjump_p (BB_END (exit_bb)) || !onlyjump_p (BB_END (exit_bb)))
return;
ein = EDGE_SUCC (exit_bb, 0);