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doc: Document TARGET_TRULY_NOOP_TRUNCATION requires trunc?i?i2 patterns.
authorRoger Sayle <roger@nextmovesoftware.com>
Thu, 16 Jul 2020 10:47:47 +0000 (11:47 +0100)
committerRoger Sayle <roger@nextmovesoftware.com>
Thu, 16 Jul 2020 10:47:47 +0000 (11:47 +0100)
commit5abe0d81db068c06ae57b011e1a9d4fd7976ac56
treea212d4eb01f60556fccb4f49e34077c37663b2e1tree
parent135c02769b9ec625a55a0beba63415c1484f8951commit | diff
doc: Document TARGET_TRULY_NOOP_TRUNCATION requires trunc?i?i2 patterns.

2020-07-16  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog:
* target.def (TARGET_TRULY_NOOP_TRUNCATION): Clarify that
targets that return false, indicating SUBREGs shouldn't be
used, also need to provide a trunc?i?i2 optab that performs this
truncation.
* doc/tm.texi: Regenerate.
gcc/doc/tm.texi diff | blob | history
gcc/target.def diff | blob | history