https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86749
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Author: rsandifo Date: Wed Aug 1 14:40:35 2018 New Revision: 263213 URL: https://gcc.gnu.org/viewcvs?rev=263213&root=gcc&view=rev Log: Fix over-widening handling of COND_EXPRs (PR 86749) This PR is a wrong-code bug caused by the over-widening support. The minimum input precisions for a COND_EXPR are supposed to apply only to the "then" and "else" values, but here we were applying them to the operands of a nested COND_EXPR comparison instead. 2018-08-01 Richard Sandiford <richard.sandif...@arm.com> gcc/ PR tree-optimization/86749 * tree-vect-patterns.c (vect_determine_min_output_precision_1): If the lhs is used in a COND_EXPR, check that it is being used as the "then" or "else" value. gcc/testsuite/ PR tree-optimization/86749 * gcc.dg/vect/pr86749.c: New test. Added: trunk/gcc/testsuite/gcc.dg/vect/pr86749.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vect-patterns.c
