[Bug tree-optimization/54295] [4.7/4.8 regression] Widening multiply-accumulate operation uses wrong value extension
rearnsha at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Aug 20 12:50:00 GMT 2012
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54295
--- Comment #3 from Richard Earnshaw <rearnsha at gcc dot gnu.org> 2012-08-20 12:49:55 UTC ---
Author: rearnsha
Date: Mon Aug 20 12:49:47 2012
New Revision: 190533
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190533
Log:
PR tree-ssa/54295
* tree-ssa-math-opts.c (widening_mult_conversion_strippable_p):
New function.
(is_widening_mult_rhs_p): Use it.
* gcc.c-torture/execute/20120817-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/20120817-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
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