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tree-cfg.c (lower_phi_internal_fn): Do not look for further PHIs after a regular stmt.

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2016-11-29  Richard Biener  <rguenther@suse.de>

	* tree-cfg.c (lower_phi_internal_fn): Do not look for further
	PHIs after a regular stmt.
	(stmt_starts_bb_p): PHIs not preceeded by a PHI or a label
	start a new BB.

From-SVN: r242959
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Richard Biener 2016-11-29 14:01:32 +00:00 committed by Richard Biener
parent 248cce34f1
commit 00738904f3
2 changed files with 24 additions and 10 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-11-29 Richard Biener <rguenther@suse.de>
* tree-cfg.c (lower_phi_internal_fn): Do not look for further
PHIs after a regular stmt.
(stmt_starts_bb_p): PHIs not preceeded by a PHI or a label
start a new BB.
2016-11-29 Martin Liska <mliska@suse.cz>
PR gcov-profile/78582

27
gcc/tree-cfg.c
View File

@ -361,14 +361,11 @@ lower_phi_internal_fn ()
/* After edge creation, handle __PHI function from GIMPLE FE. */
FOR_EACH_BB_FN (bb, cfun)
{
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi);)
for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi);)
{
stmt = gsi_stmt (gsi);
if (! gimple_call_internal_p (stmt, IFN_PHI))
{
gsi_next (&gsi);
continue;
}
break;
lhs = gimple_call_lhs (stmt);
phi_node = create_phi_node (lhs, bb);
@ -2604,11 +2601,21 @@ stmt_starts_bb_p (gimple *stmt, gimple *prev_stmt)
else
return true;
}
else if (gimple_code (stmt) == GIMPLE_CALL
&& gimple_call_flags (stmt) & ECF_RETURNS_TWICE)
/* setjmp acts similar to a nonlocal GOTO target and thus should
start a new block. */
return true;
else if (gimple_code (stmt) == GIMPLE_CALL)
{
if (gimple_call_flags (stmt) & ECF_RETURNS_TWICE)
/* setjmp acts similar to a nonlocal GOTO target and thus should
start a new block. */
return true;
if (gimple_call_internal_p (stmt, IFN_PHI)
&& prev_stmt
&& gimple_code (prev_stmt) != GIMPLE_LABEL
&& (gimple_code (prev_stmt) != GIMPLE_CALL
|| ! gimple_call_internal_p (prev_stmt, IFN_PHI)))
/* PHI nodes start a new block unless preceeded by a label
or another PHI. */
return true;
}
return false;
}