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re PR rtl-optimization/45903 (unnecessary load of 32/64bit variable when only 8 bits...
authorJakub Jelinek <jakub@redhat.com>
Fri, 8 Oct 2010 20:49:19 +0000 (22:49 +0200)
committerJakub Jelinek <jakub@gcc.gnu.org>
Fri, 8 Oct 2010 20:49:19 +0000 (22:49 +0200)
commit509dd3804c49658b31dbdae676979e95e7ecd8cb
tree132af12e172f41cd9faf29bd32999c04ed39e7ectree
parent0fd76d8e4c34b647eec8fcd7c8b797b8559301e0commit | diff
re PR rtl-optimization/45903 (unnecessary load of 32/64bit variable when only 8 bits are needed)

PR tree-optimization/45903
* simplify-rtx.c (simplify_subreg): Optimize lowpart SUBREG
of *SHIFTRT of MEM.

* gcc.target/i386/pr45903.c: New test.

From-SVN: r165200
gcc/ChangeLog diff | blob | blame | history
gcc/simplify-rtx.c diff | blob | blame | history
gcc/testsuite/ChangeLog diff | blob | blame | history
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