[Bug optimization/13424] [3.4/3.5 Regression] gcc.dg/20031202-1.c is miscompiled

["cvs-commit at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-04-02 23:05 -------
Subject: Bug 13424

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	jakub@gcc.gnu.org	2004-04-02 23:05:44

Modified files:
	gcc            : ChangeLog explow.c expr.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.c-torture/execute: 20040401-1.c 
	gcc/testsuite/gcc.dg: 20040302-1.c 

Log message:
	PR optimization/13424, optimization/12419
	* explow.c (maybe_set_unchanging): Revert 2003-04-07 patch.
	Set RTX_UNCHANGING_P even for read-only DECL_EXTERNAL decls.
	* expr.c (store_constructor): When clearing aggregate because
	of an incomplete or mostly zero constructor, do the clearing
	without /u flag and then emit a blockage.
	
	* gcc.dg/20040302-1.c: New test.
	* gcc.c-torture/execute/20040401-1.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.377&r2=2.2326.2.378
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/explow.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.118&r2=1.118.4.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.615.4.10&r2=1.615.4.11
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.161&r2=1.3389.2.162
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040401-1.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/20040302-1.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13424