[WebAssembly] Fix symbol exports under -r/--relocatable

This change cleans up the way wasm exports and globals
are generated, particualrly for -r/--relocatable where
globals need to be created and exported in order for
output relocations which reference them.

Remove the need for a per file GlobalIndexOffset and
instead set the output index for each symbol directly.
This simplifies the code in several places.

Differential Revision: https://reviews.llvm.org/D40859

llvm-svn: 320001

1 files changed, 2 insertions, 0 deletions

diff --git a/lld/wasm/SymbolTable.h b/lld/wasm/SymbolTable.h
index 9dfcb39b5f3..e1e7da120b9 100644
--- a/lld/wasm/SymbolTable.h
+++ b/lld/wasm/SymbolTable.h
@@ -47,6 +47,7 @@ public:
   void reportDuplicate(Symbol *Existing, InputFile *NewFile);
   void reportRemainingUndefines();
 
+  ArrayRef<Symbol *> getSymbols() const { return SymVector; }
   Symbol *find(StringRef Name);
 
   Symbol *addDefined(InputFile *F, const WasmSymbol *Sym,
@@ -60,6 +61,7 @@ private:
   std::pair<Symbol *, bool> insert(StringRef Name);
 
   llvm::DenseMap<llvm::CachedHashStringRef, Symbol *> SymMap;
+  std::vector<Symbol *> SymVector;
 };
 
 extern SymbolTable *Symtab;