r278806 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Thu Nov 28 12:22:04 2019
New Revision: 278806

URL: https://gcc.gnu.org/viewcvs?rev=278806&root=gcc&view=rev
Log:
2019-11-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92645
	* tree-ssa-forwprop.c (get_bit_field_ref_def): Also handle
	conversions inside a mode class.  Remove restriction on
	preserving the element size.
	(simplify_vector_constructor): Deal with the above and for
	identity permutes also try using VEC_UNPACK_[FLOAT_]LO_EXPR
	and VEC_PACK_TRUNC_EXPR.

	* gcc.target/i386/pr92645-4.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr92645-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c