From 76f5b362bfc2665196048f8d811f259614db0072 Mon Sep 17 00:00:00 2001
From: Sam Clegg <sbc@chromium.org>
Date: Thu, 29 Oct 2020 11:44:20 -0700
Subject: Remove support for emscripten legacy PIC ABI (#3299)

---
 src/wasm/wasm-emscripten.cpp | 42 ------------------------------------------
 1 file changed, 42 deletions(-)

(limited to 'src/wasm/wasm-emscripten.cpp')

diff --git a/src/wasm/wasm-emscripten.cpp b/src/wasm/wasm-emscripten.cpp
index 7f7b227cf..a1a53af7e 100644
--- a/src/wasm/wasm-emscripten.cpp
+++ b/src/wasm/wasm-emscripten.cpp
@@ -38,7 +38,6 @@ cashew::IString EM_ASM_PREFIX("emscripten_asm_const");
 cashew::IString EM_JS_PREFIX("__em_js__");
 
 static Name STACK_INIT("stack$init");
-static Name POST_INSTANTIATE("__post_instantiate");
 
 void addExportedFunction(Module& wasm, Function* function) {
   wasm.addFunction(function);
@@ -75,47 +74,6 @@ Global* getStackPointerGlobal(Module& wasm) {
   return nullptr;
 }
 
-// For emscripten SIDE_MODULE we generate a single exported function called
-// __post_instantiate which calls two functions:
-//
-// - __assign_got_enties
-// - __wasm_call_ctors
-//
-// The former is function we generate here which calls imported g$XXX functions
-// order to assign values to any globals imported from GOT.func or GOT.mem.
-// These globals hold address of functions and globals respectively.
-//
-// The later is the constructor function generaed by lld which performs any
-// fixups on the memory section and calls static constructors.
-void EmscriptenGlueGenerator::generatePostInstantiateFunction() {
-  BYN_TRACE("generatePostInstantiateFunction\n");
-  Builder builder(wasm);
-  Function* post_instantiate = builder.makeFunction(
-    POST_INSTANTIATE, std::vector<NameType>{}, Type::none, {});
-  wasm.addFunction(post_instantiate);
-
-  if (Function* F = wasm.getFunctionOrNull(ASSIGN_GOT_ENTRIES)) {
-    // call __assign_got_enties from post_instantiate
-    Expression* call = builder.makeCall(F->name, {}, Type::none);
-    post_instantiate->body = builder.blockify(post_instantiate->body, call);
-  }
-
-  // The names of standard imports/exports used by lld doesn't quite match that
-  // expected by emscripten.
-  // TODO(sbc): Unify these
-  if (auto* e = wasm.getExportOrNull(WASM_CALL_CTORS)) {
-    Expression* call = builder.makeCall(e->value, {}, Type::none);
-    post_instantiate->body = builder.blockify(post_instantiate->body, call);
-    wasm.removeExport(WASM_CALL_CTORS);
-  }
-
-  auto* ex = new Export();
-  ex->value = post_instantiate->name;
-  ex->name = POST_INSTANTIATE;
-  ex->kind = ExternalKind::Function;
-  wasm.addExport(ex);
-}
-
 const Address UNKNOWN_OFFSET(uint32_t(-1));
 
 std::vector<Address> getSegmentOffsets(Module& wasm) {
-- 
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