Add a string lowering mode disallowing non-UTF-8 strings (#6861)

The best way to lower strings is via the "magic imports" API that uses
the names of imported string globals as their values. This approach only
works for valid UTF-8 strings, though. The existing
string-lowering-magic-imports pass falls back to putting non-UTF-8
strings in a JSON custom section, but this requires the runtime to
support that custom section for correctness. To help catch errors early
when runtimes do not support the strings custom section, add a new pass
that uses magic imports and raises an error if there are any invalid
strings.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/passes/passes.h b/src/passes/passes.h
index 9fcb5f95f..a95365676 100644
--- a/src/passes/passes.h
+++ b/src/passes/passes.h
@@ -158,6 +158,7 @@ Pass* createStackCheckPass();
 Pass* createStringGatheringPass();
 Pass* createStringLoweringPass();
 Pass* createStringLoweringMagicImportPass();
+Pass* createStringLoweringMagicImportAssertPass();
 Pass* createStripDebugPass();
 Pass* createStripDWARFPass();
 Pass* createStripProducersPass();