From patchwork Tue Jun 15 10:33:53 2010
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Subject: [PR,44464] Add a missing call to release_ssa_name
Date: Tue, 15 Jun 2010 00:33:53 -0000
From: Martin Jambor <mjambor@suse.cz>
X-Patchwork-Id: 55630
Message-Id: <20100615103353.GB12135@virgil.suse.cz>
To: GCC Patches <gcc-patches@gcc.gnu.org>
Cc: Richard Guenther <rguenther@suse.de>

Hi,

the patch below fixes PR 44464.  IPA-SRA currently leaves behind a
danglig reference to old PARAM_DECLs in dead but still existing
SSA_NAMEs which means we can bump into it unexpectedly later on like
in the bug.  Releasing the SSA_NAMEs appropriately deals with these
problems.

Bootstrapped and tested on x86-64-linux without any problems.  OK for
trunk and later on for the 4.5 branch too?

Thanks,

Martin


2010-06-14  Martin Jambor  <mjambor@suse.cz>

	PR lto/44464
	* tree-sra.c (replace_removed_params_ssa_names): Call release_ssa_name
	on the newly dead SSA name.


Index: mine/gcc/tree-sra.c
===================================================================
--- mine.orig/gcc/tree-sra.c
+++ mine/gcc/tree-sra.c
@@ -3883,6 +3883,7 @@ replace_removed_params_ssa_names (gimple
     gimple_phi_set_result (stmt, name);
 
   replace_uses_by (lhs, name);
+  release_ssa_name (lhs);
   return true;
 }