Driver: begin threading frontend support for SymbolRewriter
Allow blessed access to the symbol rewriter from the driver. Although the
symbol rewriter could be invoked through tools like opt and llc, it would not
accessible from the frontend. This allows us to read the rewrite map files in
the frontend rather than the backend and enable symbol rewriting for actually
performing the symbol interpositioning.
llvm-svn: 225504
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 5421574..e126719 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -39,6 +39,7 @@
#include "llvm/Transforms/Instrumentation.h"
#include "llvm/Transforms/ObjCARC.h"
#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Utils/SymbolRewriter.h"
#include <memory>
using namespace clang;
using namespace llvm;
@@ -234,6 +235,17 @@
return TLI;
}
+static void addSymbolRewriterPass(const CodeGenOptions &Opts,
+ PassManager *MPM) {
+ llvm::SymbolRewriter::RewriteDescriptorList DL;
+
+ llvm::SymbolRewriter::RewriteMapParser MapParser;
+ for (const auto &MapFile : Opts.RewriteMapFiles)
+ MapParser.parse(MapFile, &DL);
+
+ MPM->add(createRewriteSymbolsPass(DL));
+}
+
void EmitAssemblyHelper::CreatePasses() {
unsigned OptLevel = CodeGenOpts.OptimizationLevel;
CodeGenOptions::InliningMethod Inlining = CodeGenOpts.getInlining();
@@ -346,6 +358,8 @@
// Set up the per-module pass manager.
PassManager *MPM = getPerModulePasses();
+ if (!CodeGenOpts.RewriteMapFiles.empty())
+ addSymbolRewriterPass(CodeGenOpts, MPM);
if (CodeGenOpts.VerifyModule)
MPM->add(createDebugInfoVerifierPass());