https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92768
--- Comment #20 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:2408b93a10c9c6cb210bc2a93d39ce6d56144ca3 commit r9-8253-g2408b93a10c9c6cb210bc2a93d39ce6d56144ca3 Author: Richard Sandiford <richard.sandif...@arm.com> Date: Thu Dec 5 14:20:38 2019 +0000 Check for bitwise identity when encoding VECTOR_CSTs [PR92768] This PR shows that we weren't checking for bitwise-identical values when trying to encode a VECTOR_CST, so -0.0 was treated the same as 0.0 for -fno-signed-zeros. The patch adds a new OEP flag to select that behaviour. 2020-02-18 Richard Sandiford <richard.sandif...@arm.com> gcc/ Backport from mainline 2019-12-05 Richard Sandiford <richard.sandif...@arm.com> PR middle-end/92768 * tree-core.h (OEP_BITWISE): New flag. * fold-const.c (operand_compare::operand_equal_p): Handle it. * tree-vector-builder.h (tree_vector_builder::equal_p): Pass it. gcc/testsuite/ PR middle-end/92768 * gcc.dg/pr92768.c: New test.
