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authorVincent Ambo <mail@tazj.in>2023-01-05T12·11+0300
committertazjin <tazjin@tvl.su>2023-01-06T12·23+0000
commit6a8541e35a76b1d0d100c505d395d0e0418377c7 (patch)
treecd1658f62548197ec6bf4ababd489fbbbeb64079 /tvix/eval/src/tests
parent36e5a4cc07c963e89edd409d9050fe67c10e7e8d (diff)
feat(tvix/eval): implement initial compiler::optimiser module r/5602
This optimiser can rewrite some expressions into more efficient forms,
and warn users about those cases.

As a proof-of-concept, only some simple boolean comparisons are
supported for now.

Change-Id: I7df561118cfbad281fc99523e859bc66e7a1adcb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7766
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Diffstat (limited to 'tvix/eval/src/tests')
-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.exp1
-rw-r--r--tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.nix21
2 files changed, 22 insertions, 0 deletions
diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.exp b/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.exp
new file mode 100644
index 000000000000..9d9185fcd155
--- /dev/null
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.exp
@@ -0,0 +1 @@
+[ true true false false true true false false ]
diff --git a/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.nix b/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.nix
new file mode 100644
index 000000000000..650d7f028df2
--- /dev/null
+++ b/tvix/eval/src/tests/tvix_tests/eval-okay-optimised-bools.nix
@@ -0,0 +1,21 @@
+let
+  makeTrue = _: true;
+  makeFalse = _: false;
+in
+[
+  # useless `false`
+  (false || makeTrue null) # true
+  (makeTrue null || false) # true
+
+  # useless `true`
+  (true && makeFalse null) # false
+  (makeFalse null && true) # false
+
+  # useless `||`
+  (true || makeFalse null) # true
+  (makeFalse null || true) # true
+
+  # useless `&&`
+  (false && makeTrue null) # false
+  (makeTrue null && false) # false
+]