[Strings] Add string.const (#4768)

This is more work than a typical instruction because it also adds a new section:
all the (string.const "foo") strings are put in a new "strings" section in the binary, and
the instructions refer to them by index.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/ir/possible-contents.cpp b/src/ir/possible-contents.cpp
index 8b95490b6..1d1825865 100644
--- a/src/ir/possible-contents.cpp
+++ b/src/ir/possible-contents.cpp
@@ -678,6 +678,9 @@ struct InfoCollector
     }
     addRoot(curr, PossibleContents::exactType(curr->type));
   }
+  void visitStringConst(StringConst* curr) {
+    addRoot(curr, PossibleContents::exactType(curr->type));
+  }
 
   // TODO: Model which throws can go to which catches. For now, anything thrown
   //       is sent to the location of that tag, and any catch of that tag can