[PATCH] D155542: [lld][WebAssembly] Fix func reloc for internal GOT with extended-const

[YAMAMOTO Takashi via Phabricator via llvm-commits]

yamt created this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155542

Files:
  lld/wasm/SyntheticSections.cpp


Index: lld/wasm/SyntheticSections.cpp
===================================================================
--- lld/wasm/SyntheticSections.cpp
+++ lld/wasm/SyntheticSections.cpp
@@ -497,6 +497,17 @@
         writeU8(os, is64 ? WASM_OPCODE_I64_ADD : WASM_OPCODE_I32_ADD, "add");
       }
       writeU8(os, WASM_OPCODE_END, "opcode:end");
+    } else if (config->extendedConst && config->isPic && !sym->isStub &&
+               isa<FunctionSymbol>(sym)) {
+      // We can use an extended init expression to add a constant
+      // offset of __table_base.
+      auto *f = cast<FunctionSymbol>(sym);
+      writeU8(os, WASM_OPCODE_GLOBAL_GET, "global get");
+      writeUleb128(os, WasmSym::tableBase->getGlobalIndex(),
+                   "literal (global index)");
+      writePtrConst(os, f->getTableIndex(), is64, "offset");
+      writeU8(os, is64 ? WASM_OPCODE_I64_ADD : WASM_OPCODE_I32_ADD, "add");
+      writeU8(os, WASM_OPCODE_END, "opcode:end");
     } else {
       WasmInitExpr initExpr;
       if (auto *d = dyn_cast<DefinedData>(sym))


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