https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84154
--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> --- Author: meissner Date: Wed Feb 7 22:54:59 2018 New Revision: 257470 URL: https://gcc.gnu.org/viewcvs?rev=257470&root=gcc&view=rev Log: [gcc] 2018-02-07 Michael Meissner <meiss...@linux.vnet.ibm.com> PR target/84154 * config/rs6000/rs6000.md (fix_trunc<SFDF:mode><QHI:mode>2): Convert from define_expand to be define_insn_and_split. Rework float/double/_Float128 conversions to QI/HI/SImode to work with both ISA 2.07 (power8) or ISA 3.0 (power9). Fix regression where conversions to QI/HImode types did a store and then a load to truncate the value. For conversions to VSX registers, don't split the insn, instead emit the code directly. Use the code iterator any_fix to combine signed and unsigned conversions. (fix<uns>_trunc<SFDF:mode>si2_p8): Likewise. (fixuns_trunc<SFDF:mode><QHI:mode>2): Likewise. (fix_trunc<IEEE128:mode><QHI:mode>2): Likewise. (fix<uns>_trunc<SFDF:mode><QHI:mode>2): Likewise. (fix_<mode>di2_hw): Likewise. (fixuns_<mode>di2_hw): Likewise. (fix_<mode>si2_hw): Likewise. (fixuns_<mode>si2_hw): Likewise. (fix<uns>_<IEEE128:mode><SDI:mode>2_hw): Likewise. (fix<uns>_trunc<IEEE128:mode><QHI:mode>2): Likewise. (fctiw<u>z_<mode>_smallint): Rename fctiw<u>z_<mode>_smallint to fix<uns>_trunc<SFDF:mode>si2_p8. (fix_trunc<SFDF:mode><QHI:mode>2_internal): Delete, no longer used. (fixuns_trunc<SFDF:mode><QHI:mode>2_internal): Likewise. (fix<uns>_<mode>_mem): Likewise. (fctiw<u>z_<mode>_mem): Likewise. (fix<uns>_<mode>_mem): Likewise. (fix<uns>_trunc<SFDF:mode><QHSI:mode>2_mem): On ISA 3.0, prevent the register allocator from doing a direct move to the GPRs to do a store, and instead use the ISA 3.0 store byte/half-word from vector register instruction. For IEEE 128-bit floating point, also optimize stores of 32-bit ints. (fix<uns>_trunc<IEEE128:mode><QHSI:mode>2_mem): Likewise. [gcc/testsuite] 2018-02-07 Michael Meissner <meiss...@linux.vnet.ibm.com> PR target/84154 * gcc.target/powerpc/pr84154-1.c: New tests. * gcc.target/powerpc/pr84154-2.c: Likewise. * gcc.target/powerpc/pr84154-3.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/powerpc/pr84154-1.c trunk/gcc/testsuite/gcc.target/powerpc/pr84154-2.c trunk/gcc/testsuite/gcc.target/powerpc/pr84154-3.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/rs6000/rs6000.md trunk/gcc/testsuite/ChangeLog
