Regressions: Support for requiring CVC4 features (#2044)

This commit adds supprt for the `REQUIRES` directive in our regression
benchmarks. This directive can be used to enable certain benchmarks only
if CVC4 has been configured with certain features enabled.

1 files changed, 13 insertions, 0 deletions

diff --git a/test/regress/README.md b/test/regress/README.md
index f6ff3c68b..d0c9b2b7a 100644
--- a/test/regress/README.md
+++ b/test/regress/README.md
@@ -108,6 +108,19 @@ string `TERM` to make the regression test robust to the actual term printed
 (e.g. there could be multiple non-linear facts and it is ok if any of them is
 printed).
 
+Sometimes, certain benchmarks only apply to certain CVC4
+configurations. The `REQUIRES` directive can be used to only run
+a given benchmark when a feature is supported. For example:
+
+```
+; REQUIRES: symfpu
+```
+
+This benchmark is only run when symfpu has been configured.
+Multiple `REQUIRES` directives are supported. For a list of
+features that can be listed as a requirement, refer to CVC4's
+`--show-config` output.
+
 Sometimes it is useful to keep the directives separate. You can separate the
 benchmark from the output expectations by putting the benchmark in `<benchmark
 file>.smt` and the directives in `<benchmark file>.smt.expect`, which is looked