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| author | Richard Henderson <rth@redhat.com> | 2011-01-22 11:35:10 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2011-01-22 11:35:10 -0800 |
| commit | e692f27683b38733fedc67b62ddd5f41b9a9e0ed (patch) | |
| tree | e448736a4d2079d8b2bb7d5d43e46d716b00478c /gcc/target.def | |
| parent | 8a9adf2c8fde74d9789b01f5c35c0e652dd69a8a (diff) | |
| download | gcc-e692f27683b38733fedc67b62ddd5f41b9a9e0ed.zip gcc-e692f27683b38733fedc67b62ddd5f41b9a9e0ed.tar.gz gcc-e692f27683b38733fedc67b62ddd5f41b9a9e0ed.tar.bz2 | |
New -fcompare-elim pass.
Version 3, with two rounds of comments from Paolo Bonzini.
From-SVN: r169131
Diffstat (limited to 'gcc/target.def')
| -rw-r--r-- | gcc/target.def | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/target.def b/gcc/target.def index bdd7662..57134cb 100644 --- a/gcc/target.def +++ b/gcc/target.def @@ -1638,6 +1638,15 @@ DEFHOOK bool, (enum machine_mode mode), hook_bool_mode_false) +/* Register number for a flags register. Only needs to be defined if the + target is constrainted to use post-reload comparison elimination. */ +DEFHOOKPOD +(flags_regnum, + "If the target has a dedicated flags register, and it needs to use the\ + post-reload comparison elimination pass, then this value should be set\ + appropriately.", + unsigned int, INVALID_REGNUM) + /* Compute a (partial) cost for rtx X. Return true if the complete cost has been computed, and false if subexpressions should be scanned. In either case, *TOTAL contains the cost result. */ |