7.2.2 Selecting targets to which a test applies

Several test directives include selectors to limit the targets for which a test is run or to declare that a test is expected to fail on particular targets.

A selector is:

• one or more target triplets, possibly including wildcard characters
• a single effective-target keyword (参见Effective-Target Keywords)
• a logical expression

Depending on the context, the selector specifies whether a test is skipped and reported as unsupported or is expected to fail. Use ‘*-*-*’ to match any target.

A selector expression appears within curly braces and uses a single logical operator: one of ‘!’, ‘&&’, or ‘||’. An operand is another selector expression, an effective-target keyword, a single target triplet, or a list of target triplets within quotes or curly braces. For example:

     { target { ! "hppa*-*-* ia64*-*-*" } }
     { target { powerpc*-*-* && lp64 } }
     { xfail { lp64 || vect_no_align } }