Only generate debug info when in --debug mode (or asked).

src/alloy/frontend/frontend.h

@@ -39,7 +39,7 @@ public:
   virtual int DeclareFunction(
       runtime::FunctionInfo* symbol_info) = 0;
   virtual int DefineFunction(
-      runtime::FunctionInfo* symbol_info,
+      runtime::FunctionInfo* symbol_info, bool with_debug_info,
       runtime::Function** out_function) = 0;
 
 protected:

src/alloy/frontend/ppc/ppc_frontend.cc

@@ -92,10 +92,11 @@ int PPCFrontend::DeclareFunction(
 }
 
 int PPCFrontend::DefineFunction(
-    FunctionInfo* symbol_info,
+    FunctionInfo* symbol_info, bool with_debug_info,
     Function** out_function) {
   PPCTranslator* translator = translator_pool_.Allocate(this);
-  int result = translator->Translate(symbol_info, out_function);
+  int result = translator->Translate(
+      symbol_info, with_debug_info, out_function);
   translator_pool_.Release(translator);
   return result;
 }

src/alloy/frontend/ppc/ppc_frontend.h

@@ -32,7 +32,7 @@ public:
   virtual int DeclareFunction(
       runtime::FunctionInfo* symbol_info);
   virtual int DefineFunction(
-      runtime::FunctionInfo* symbol_info,
+      runtime::FunctionInfo* symbol_info, bool with_debug_info,
       runtime::Function** out_function);
 
 private:

src/alloy/frontend/ppc/ppc_translator.cc

@@ -9,6 +9,7 @@
 
 #include <alloy/frontend/ppc/ppc_translator.h>
 
+#include <alloy/alloy-private.h>
 #include <alloy/compiler/passes.h>
 #include <alloy/frontend/tracing.h>
 #include <alloy/frontend/ppc/ppc_frontend.h>
@@ -56,6 +57,7 @@ PPCTranslator::~PPCTranslator() {
 
 int PPCTranslator::Translate(
     FunctionInfo* symbol_info,
+    bool with_debug_info,
     Function** out_function) {
   // Scan the function to find its extents. We only need to do this if we
   // haven't already been provided with them from some other source.
@@ -70,7 +72,10 @@ int PPCTranslator::Translate(
   }
 
   // NOTE: we only want to do this when required, as it's expensive to build.
-  DebugInfo* debug_info = new DebugInfo();
+  DebugInfo* debug_info = NULL;
+  if (FLAGS_debug || with_debug_info) {
+    debug_info = new DebugInfo();
+  }
 
   // Stash source.
   if (debug_info) {

src/alloy/frontend/ppc/ppc_translator.h

@@ -31,6 +31,7 @@ public:
   ~PPCTranslator();
 
   int Translate(runtime::FunctionInfo* symbol_info,
+                bool with_debug_info,
                 runtime::Function** out_function);
 
 private: