[Bug tree-optimization/22278] gcc -O2 discards cast to volatile

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-20 00:07 -------
Subject: Bug 22278

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	rth@gcc.gnu.org	2005-07-20 00:06:50

Modified files:
	gcc            : ChangeLog gimplify.c tree-ssa.c 

Log message:
	PR tree-opt/22278
	* gimplify.c (gimplify_expr): Use main variant type for the temp
	destination for a discarded volatile read.
	* tree-ssa.c (tree_ssa_useless_type_conversion_1): Don't elide
	casts between non-void types that change volatility.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.320&r2=2.7592.2.321
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/gimplify.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.113.2.7&r2=2.113.2.8
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.78.2.2&r2=2.78.2.3



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22278