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| author | Hans-Peter Nilsson <hp@axis.com> | 2020-01-23 20:24:36 +0100 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@axis.com> | 2020-05-09 03:39:35 +0200 |
| commit | a792c62c17aed562f415771b0f89b399470b4fee (patch) | |
| tree | d2bc35f5d2faefe3986109b758e172e9373fa9f9 | |
| parent | 27228024598c3515389cdb378346433fb2c48551 (diff) | |
| download | gcc-a792c62c17aed562f415771b0f89b399470b4fee.zip gcc-a792c62c17aed562f415771b0f89b399470b4fee.tar.gz gcc-a792c62c17aed562f415771b0f89b399470b4fee.tar.bz2 | |
cris: Define TARGET_FLAGS_REGNUM.
This made a whole lot of difference regarding regressions in the
delay-slot filling. Before this, comparing __lshrdi3 for v10
before/after decc0ration and other nearby functions was worse by
several missing delay-slot fills; now down to 1.
Also, add a comment about *not* defining
TARGET_FIXED_CONDITION_CODE_REGS.
gcc:
* config/cris/cris.c (TARGET_FLAGS_REGNUM): Define.
| -rw-r--r-- | gcc/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/config/cris/cris.c | 10 |
2 files changed, 12 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 915a007..3928ee7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -38,6 +38,8 @@ * config/cris/cris.md (zcond): New code_iterator. ("*cbranch<mode>4_btstq<CC>"): New insn_and_split. + * config/cris/cris.c (TARGET_FLAGS_REGNUM): Define. + 2020-05-08 Vladimir Makarov <vmakarov@redhat.com> * ira-color.c (update_costs_from_allocno): Remove diff --git a/gcc/config/cris/cris.c b/gcc/config/cris/cris.c index 9fdabe2..eecda83 100644 --- a/gcc/config/cris/cris.c +++ b/gcc/config/cris/cris.c @@ -219,6 +219,16 @@ int cris_cpu_version = CRIS_DEFAULT_CPU_VERSION; #undef TARGET_PREFERRED_RELOAD_CLASS #define TARGET_PREFERRED_RELOAD_CLASS cris_preferred_reload_class +/* We don't define TARGET_FIXED_CONDITION_CODE_REGS, as at the time of + this writing, it has an effect only on pre-reload CSE and when + scheduling (and for "macro fusion" at that). Neither applies for + CRIS so don't waste compilation cycles on enabling a pass that does + nothing. Beware of changes to its usage; it may make sense to enable + "later". */ + +#undef TARGET_FLAGS_REGNUM +#define TARGET_FLAGS_REGNUM CRIS_CC0_REGNUM + #undef TARGET_REGISTER_MOVE_COST #define TARGET_REGISTER_MOVE_COST cris_register_move_cost #undef TARGET_MEMORY_MOVE_COST |