Strip the producers section in --strip-producers (#1875)

WebAssembly/tool-conventions#93 has a summary of emscripten's current thinking on this. For Binaryen, we don't want to do anything to the producers section by default, but do want it to be possible to optionally remove it. To achieve that, this PR

 * creates a --strip-producers pass that removes that section.
 * creates a --strip-debug pass that removes debug info, same as the old --strip, which is still around but deprecated.

A followup in emscripten will use this pass by default.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index cae69860a..2872575c2 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -133,7 +133,9 @@ void PassRegistry::registerPasses() {
   registerPass("souperify-single-use", "emit Souper IR in text form (single-use nodes only)", createSouperifySingleUsePass);
   registerPass("spill-pointers", "spill pointers to the C stack (useful for Boehm-style GC)", createSpillPointersPass);
   registerPass("ssa", "ssa-ify variables so that they have a single assignment", createSSAifyPass);
-  registerPass("strip", "strip debug info (including the names section)", createStripPass);
+  registerPass("strip", "deprecated; same as strip-debug", createStripDebugPass);
+  registerPass("strip-debug", "strip debug info (including the names section)", createStripDebugPass);
+  registerPass("strip-producers", "strip the wasm producers section", createStripProducersPass);
   registerPass("trap-mode-clamp", "replace trapping operations with clamping semantics", createTrapModeClamp);
   registerPass("trap-mode-js", "replace trapping operations with js semantics", createTrapModeJS);
   registerPass("untee", "removes local.tees, replacing them with sets and gets", createUnteePass);