https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88240
--- Comment #21 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:009a8566d8ac5cc6ab1604716ba43d3c0bd99b64 commit r9-9537-g009a8566d8ac5cc6ab1604716ba43d3c0bd99b64 Author: Richard Biener <rguent...@suse.de> Date: Tue Aug 4 14:10:45 2020 +0200 tree-optimization/88240 - stopgap for floating point code-hoisting issues This adds a stopgap measure to avoid performing code-hoisting on mixed type loads when the load we'd insert in the hoisting position would be a floating point one. This is because certain targets (hello x87) cannot perform floating point loads without possibly altering the bit representation and thus cannot be used in place of integral loads. 2020-08-04 Richard Biener <rguent...@suse.de> PR tree-optimization/88240 * tree-ssa-sccvn.h (vn_reference_s::punned): New flag. * tree-ssa-sccvn.c (vn_reference_insert): Initialize punned. (vn_reference_insert_pieces): Likewise. (visit_reference_op_call): Likewise. (visit_reference_op_load): Track whether a ref was punned. * tree-ssa-pre.c (do_hoist_insertion): Refuse to perform hoist insertion on punned floating point loads. * gcc.target/i386/pr88240.c: New testcase.
