https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88240
--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:1af5cdd77985daf76130f527deac425c43df9f49 commit r11-2545-g1af5cdd77985daf76130f527deac425c43df9f49 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.
