[Bug target/78101] PowerPC 64-bit little endian fusion failure with -O3 -mcpu=power9

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78101

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Thu Nov 17 21:42:13 2016
New Revision: 242564

URL: https://gcc.gnu.org/viewcvs?rev=242564&root=gcc&view=rev
Log:
[gcc]
2016-11-17  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/78101
        * config/rs6000/predicates.md (fusion_addis_mem_combo_load): Add
        the appropriate checks for SFmode/DFmode load/stores in GPR
        registers.
        (fusion_addis_mem_combo_store): Likewise.
        * config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Rename
        fusion_fpr_* to fusion_vsx_* and add in support for ISA 3.0 scalar
        d-form instructions for traditional Altivec registers.
        (emit_fusion_p9_load): Likewise.
        (emit_fusion_p9_store): Likewise.
        * config/rs6000/rs6000.md (p9 fusion store peephole2): Remove
        early clobber from scratch register.  Do not match if the register
        being stored is the scratch register.
        (fusion_vsx_<P:mode>_<FPR_FUSION:mode>_load): Rename fusion_fpr_*
        to fusion_vsx_* and add in support for ISA 3.0 scalar d-form
        instructions for traditional Altivec registers.
        (fusion_fpr_<P:mode>_<FPR_FUSION:mode>_load): Likewise.
        (fusion_vsx_<P:mode>_<FPR_FUSION:mode>_store): Likewise.
        (fusion_fpr_<P:mode>_<FPR_FUSION:mode>_store): Likewise.

[gcc/testsuite]
2016-11-17  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/78101
        * gcc.target/powerpc/fusion4.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/fusion4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/predicates.md
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/testsuite/ChangeLog