[Bug tree-optimization/54295] [4.7/4.8 regression] Widening multiply-accumulate operation uses wrong value extension

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54295

Ramana Radhakrishnan ramana at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2012-09-04
 CC||ramana at gcc dot gnu.org
 Ever Confirmed|0   |1

[Bug tree-optimization/54295] [4.7/4.8 regression] Widening multiply-accumulate operation uses wrong value extension

[rearnsha at gcc dot gnu.org]

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=gccview=revrev=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

[Bug tree-optimization/54295] [4.7/4.8 regression] Widening multiply-accumulate operation uses wrong value extension

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54295

--- Comment #4 from Richard Earnshaw rearnsha at gcc dot gnu.org 2012-08-20 
14:13:40 UTC ---
Author: rearnsha
Date: Mon Aug 20 14:13:16 2012
New Revision: 190534

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=190534
Log:
PR tree-ssa/54295
* tree-ssa-math-opts.c (is_widening_mult_rhs_p): Delete rhs_code
declaration and setter.

Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-math-opts.c

[Bug tree-optimization/54295] [4.7/4.8 regression] Widening multiply-accumulate operation uses wrong value extension

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54295

Richard Guenther rguenth at gcc dot gnu.org changed:

   What|Removed |Added

   Target Milestone|--- |4.7.2
Summary|[4.7 regression] Widening   |[4.7/4.8 regression]
   |multiply-accumulate |Widening
   |operation uses wrong value  |multiply-accumulate
   |extension   |operation uses wrong value
   ||extension