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| author | Vladimir Makarov <vmakarov@redhat.com> | 2018-02-22 21:17:51 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2018-02-22 21:17:51 +0000 |
| commit | 7874b7c5b59923d8a56eaf41f7518c71b910355e (patch) | |
| tree | 7268aa9b5a8752e1ace59914f5238e43daa7a182 /gcc/lra-lives.c | |
| parent | b613cc2e9120ea002f8a0855d2620ee4ba8fbfe5 (diff) | |
re PR target/81572 (gcc-7 regression: unnecessary vector regmove on compare)
2018-02-22 Vladimir Makarov <vmakarov@redhat.com>
PR target/81572
* lra-int.h (LRA_UNKNOWN_ALT, LRA_NON_CLOBBERED_ALT): New macros.
* lra.c (lra_set_insn_recog_data, lra_update_insn_recog_data): Use
LRA_UNKNOWN_ALT.
* lra-constraints.c (curr_insn_transform): Set up
LRA_NON_CLOBBERED_ALT for moves processed on the fast path. Use
LRA_UNKNOWN_ALT.
(remove_inheritance_pseudos): Use LRA_UNKNOWN_ALT.
* lra-eliminations.c (spill_pseudos): Ditto.
(process_insn_for_elimination): Ditto.
* lra-lives.c (reg_early_clobber_p): Use the new macros.
* lra-spills.c (spill_pseudos): Use LRA_UNKNOWN_ALT and
LRA_NON_CLOBBERED_ALT.
2018-02-22 Vladimir Makarov <vmakarov@redhat.com>
PR target/81572
* gcc.target/powerpc/pr81572.c: New.
From-SVN: r257915
Diffstat (limited to 'gcc/lra-lives.c')
| -rw-r--r-- | gcc/lra-lives.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/lra-lives.c b/gcc/lra-lives.c index 2e53f877460..ddc0a9bbcc5 100644 --- a/gcc/lra-lives.c +++ b/gcc/lra-lives.c @@ -598,7 +598,9 @@ static inline bool reg_early_clobber_p (const struct lra_insn_reg *reg, int n_alt) { return (reg->early_clobber - && (n_alt < 0 || TEST_BIT (reg->early_clobber_alts, n_alt))); + && (n_alt == LRA_UNKNOWN_ALT + || (n_alt != LRA_NON_CLOBBERED_ALT + && TEST_BIT (reg->early_clobber_alts, n_alt)))); } /* Process insns of the basic block BB to update pseudo live ranges, |