Fuzz with maximal inlining some of the time (#3871)

1 files changed, 8 insertions, 0 deletions

diff --git a/scripts/fuzz_opt.py b/scripts/fuzz_opt.py
index 5caede369..5b67367f3 100755
--- a/scripts/fuzz_opt.py
+++ b/scripts/fuzz_opt.py
@@ -1055,6 +1055,14 @@ def randomize_opt_flags():
     # possibly converge. don't do this very often as it can be slow.
     if random.random() < 0.05:
         ret += ['--converge']
+    # possibly inline all the things as much as possible. inlining that much may
+    # be realistic in some cases (on GC benchmarks it is very helpful), but
+    # also, inlining so much allows other optimizations to kick in, which
+    # increases coverage
+    # (the specific number here doesn't matter, but it is far higher than the
+    # wasm limitation on function body size which is 128K)
+    if random.random() < 0.5:
+        ret += ['-fimfs=99999999']
     assert ret.count('--flatten') <= 1
     return ret