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Diffstat (limited to 'gcc/doc/md.texi')
| -rw-r--r-- | gcc/doc/md.texi | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 8c72c850852..3b20991af52 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -8866,7 +8866,8 @@ can be quite tedious to describe these forms directly in the (define_cond_exec [@var{predicate-pattern}] "@var{condition}" - "@var{output-template}") + "@var{output-template}" + "@var{optional-insn-attribues}") @end smallexample @var{predicate-pattern} is the condition that must be true for the @@ -8887,6 +8888,13 @@ In order to handle the general case, there is a global variable @code{current_insn_predicate} that will contain the entire predicate if the current insn is predicated, and will otherwise be @code{NULL}. +@var{optional-insn-attributes} is an optional vector of attributes that gets +appended to the insn attributes of the produced cond_exec rtx. It can +be used to add some distinguishing attribute to cond_exec rtxs produced +that way. An example usage would be to use this attribute in conjunction +with attributes on the main pattern to disable particular alternatives under +certain conditions. + When @code{define_cond_exec} is used, an implicit reference to the @code{predicable} instruction attribute is made. @xref{Insn Attributes}. This attribute must be a boolean (i.e.@: have |