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Clarify define_insn documentation
authorRichard Sandiford <richard.sandiford@linaro.org>
Wed, 7 Jun 2017 06:45:36 +0000 (06:45 +0000)
committerRichard Sandiford <rsandifo@gcc.gnu.org>
Wed, 7 Jun 2017 06:45:36 +0000 (06:45 +0000)
commit49e478afe327f4950287bf77e8d8ba19e96a60f2
treee5044a5411513fdaa02c8c32f312b7ba54c89e92tree
parent6fcdf714130596ac05167398c56897d72ab3e759commit | diff
Clarify define_insn documentation

This patch tries to clarify some of the restrictions on define_insn
conditions, and also on the use of "#".

2017-06-06  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* doc/md.texi: Clarify the restrictions on a define_insn condition.
Say that # requires an associated define_split to exist, and that
the define_split must be suitable for use after register allocation.

From-SVN: r248946
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