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tree-ssa-dse.c (dse_optimize_stmt): Remember the stmt basic-block before removing it. 

2012-04-05  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-dse.c (dse_optimize_stmt): Remember the stmt
	basic-block before removing it.

From-SVN: r186164
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Richard Guenther 2012-04-05 12:43:25 +00:00 committed by Richard Biener
parent 1bb940da3c
commit eaf6ca186f
2 changed files with 9 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-04-05 Richard Guenther <rguenther@suse.de>
* tree-ssa-dse.c (dse_optimize_stmt): Remember the stmt
basic-block before removing it.
2012-04-05 Richard Guenther <rguenther@suse.de>
* tree-ssanames.c (release_dead_ssa_names): Compact the SSA

5
gcc/tree-ssa-dse.c
View File

@ -232,6 +232,8 @@ dse_optimize_stmt (gimple_stmt_iterator gsi)
gimple_get_lhs (use_stmt), 0)))
|| stmt_kills_ref_p (use_stmt, gimple_assign_lhs (stmt)))
{
basic_block bb;
/* If use_stmt is or might be a nop assignment, e.g. for
struct { ... } S a, b, *p; ...
b = a; b = b;
@ -258,8 +260,9 @@ dse_optimize_stmt (gimple_stmt_iterator gsi)
unlink_stmt_vdef (stmt);
/* Remove the dead store. */
bb = gimple_bb (stmt);
if (gsi_remove (&gsi, true))
bitmap_set_bit (need_eh_cleanup, gimple_bb (stmt)->index);
bitmap_set_bit (need_eh_cleanup, bb->index);
/* And release any SSA_NAMEs set in this statement back to the
SSA_NAME manager. */