> I back ported your list of changes from mainline to GCC 4.8. See the > attached patches. In addition to your proposed changes I had to add > > 2013-04-10 Steven Bosscher <ste...@gcc.gnu.org> > > * config/sparc/sparc.c: Include tree-pass.h. > (TARGET_MACHINE_DEPENDENT_REORG): Do not redefine. > (sparc_reorg): Rename to sparc_do_work_around_errata. Move to > head of file. Change return type. Split off gate function. > (sparc_gate_work_around_errata): New function. > (pass_work_around_errata): New pass definition. > (insert_pass_work_around_errata) New pass insert definition to > insert pass_work_around_errata just after delayed-branch scheduling. > (sparc_option_override): Insert the pass. > * config/sparc/t-sparc (sparc.o): Add TREE_PASS_H dependence. > > This was necessary for > > 2013-07-22 Eric Botcazou <ebotca...@adacore.com> > > * config.gcc (sparc*-*-*): Accept leon3 processor. > (sparc-leon*-*): Merge with sparc*-*-* and add leon3 support. > * doc/invoke.texi (SPARC Options): Adjust -mfix-ut699 entry. > * config/sparc/sparc-opts.h (enum processor_type): Add PROCESSOR_LEON3. > * config/sparc/sparc.opt (enum processor_type): Add leon3. > (mfix-ut699): Adjust comment. > * config/sparc/sparc.h (TARGET_CPU_leon3): New define. > (CPP_CPU32_DEFAULT_SPEC): Add leon3 support. > (CPP_CPU_SPEC): Likewise. > (ASM_CPU_SPEC): Likewise. > * config/sparc/sparc.c (leon3_cost): New constant. > (sparc_option_override): Add leon3 support. > (mem_ref): New function. > (sparc_gate_work_around_errata): Return true if -mfix-ut699 is enabled. > (sparc_do_work_around_errata): Look into the instruction in the delay > slot and adjust accordingly. Add fix for the data cache nullify issues > of the UT699. Change insertion position for the NOP. > * config/sparc/leon.md (leon_fpalu, leon_fpmds, write_buf): Delete. > (leon3_load): New reservation. > (leon_store): Bump latency to 2. > (grfpu): New automaton. > (grfpu_alu): New unit. > (grfpu_ds): Likewise. > (leon_fp_alu): Adjust. > (leon_fp_mult): Delete. > (leon_fp_div): Split into leon_fp_divs and leon_fp_divd. > (leon_fp_sqrt): Split into leon_fp_sqrts and leon_fp_sqrtd. > * config/sparc/sparc.md (cpu): Add leon3. > * config/sparc/sync.md (atomic_exchangesi): Disable if -mfix-ut699. > (swapsi): Likewise. > (atomic_test_and_set): Likewise. > (ldstub): Likewise. > > I cannot judge if this was good or bad. I can only perform mechanical > changes since I don't know how the compiler works. > > I run the GCC test suite on the GDB SIS with RTEMS, but its hard for me to > interpret the results. I think there are no new test failures due to the > back ports.
Everything is clean on SPARC/Solaris and SPARC64/Solaris as well so I have no objections to backporting the whole set from a SPARC maintainership viewpoint (and we have been using something equivalent at AdaCore for some time without any problems so far). But we need the blessing of the RMs I guess here. -- Eric Botcazou
