https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104136
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Michael Meissner <meiss...@gcc.gnu.org>: https://gcc.gnu.org/g:f9063d12633c62a089115df032a19295854d8b06 commit r12-6812-gf9063d12633c62a089115df032a19295854d8b06 Author: Michael Meissner <meiss...@linux.ibm.com> Date: Fri Jan 21 18:08:50 2022 -0500 Mark XXSPLTIW/XXSPLTIDP as prefixed -- PR 104136 If you compile module_advect_em.F90 with -Ofast -mcpu=power10, one module is large enough that we can't use a single conditional jump to span the function. Instead, GCC has to reverse the condition, and do a conditional jump around an unconditional branch. It turns out when xxspltiw and xxspltdp instructions were generated, they were not marked as being prefixed (i.e. length of 12 bytes instead of 4 bytes). This meant the calculations for the branch length were off, which in turn meant the assembler raised an error because it couldn't do the conditional jump. The fix is to explicitly set the prefixed attribute when we are loading up vector constants with the xxspltiw or xxspltidp instructions. I have removed the code that sets the prefixed attribute for xxspltiw, xxspltidp, and xxsplti32dx instructions, since it no longer will be invoked. I have also explicitly set the prefixed attribute for load SF and DF mode constants with xxsplitw and xxspltidp. Previously, it was not set on these insns, but when the insn was split to get the XXSPLTIW/XXSPLTIDP forms, those forms already had the prefixed attribute set. 2022-01-21 Michael Meissner <meiss...@the-meissners.org> gcc/ PR target/104136 * config/rs6000/rs6000-protos.h (prefixed_xxsplti_p): Delete. * config/rs6000/rs6000.cc (prefixed_xxsplti_p): Delete. * config/rs6000/rs6000.md (prefixed attribute): Delete section that sets the prefixed attribute for xxspltiw, xxspltidp, and xxsplti32dx instructions. (movsf_hardfloat): Explicitly set the prefixed attribute when xxspltiw and xxspltidp instructions are generated. (mov<mode>_hardfloat32): Likewise. (mov<mode>_hardfloat64): Likewise. * config/rs6000/vsx.md (vsx_mov<mode>_64bit): Explicitly set the prefixed attribute for xxspltiw and xxspltidp instructions. (vsx_mov<mode>_32bit): Likewise.
