https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102464
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by hongtao Liu <liuho...@gcc.gnu.org>: https://gcc.gnu.org/g:2ad1e8081f4797a99a96b513ffe14c7305e9b3d8 commit r12-4984-g2ad1e8081f4797a99a96b513ffe14c7305e9b3d8 Author: liuhongt <hongtao....@intel.com> Date: Mon Nov 8 09:19:29 2021 +0800 [Gimple] Simplify (trunc)fma ((extend)a, (extend)b, (extend)c) to IFN_FMA (a,b, c). a, b, c are same type as truncation type and has less precision than extend type, the optimization is guarded under flag_unsafe_math_optimizations. gcc/ChangeLog: PR target/102464 * match.pd: Simplify (trunc)fma ((extend)a, (extend)b, (extend)c) to IFN_FMA (a, b, c) under flag_unsafe_math_optimizations. gcc/testsuite/ChangeLog: * gcc.target/i386/pr102464-fma.c: New test.
