[full-codegen] Reload context register after intrinsic call.

src/full-codegen/full-codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/full-codegen/full-codegen.h"
 
+#include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
-#include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopeinfo.h"
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
 #include "src/debug/debug.h"
 #include "src/debug/liveedit.h"
+#include "src/frames-inl.h"
 #include "src/isolate-inl.h"
 #include "src/macro-assembler.h"
 #include "src/snapshot/snapshot.h"
 #include "src/tracing/trace-event.h"
 
 namespace v8 {
 namespace internal {
 
 #define __ ACCESS_MASM(masm())
 
@@ skipping 525 matching lines @@
     VisitForAccumulatorValue(args->at(last));
 
     // Move the arguments to the registers, as required by the stub.
     __ Move(callable.descriptor().GetRegisterParameter(last),
             result_register());
     for (int i = last; i-- > 0;) {
       PopOperand(callable.descriptor().GetRegisterParameter(i));
     }
   }
   __ Call(callable.code(), RelocInfo::CODE_TARGET);
+
+  // Reload the context register after the call as i.e. TurboFan code stubs
+  // won't preserve the context register.
+  LoadFromFrameField(StandardFrameConstants::kContextOffset,
+                     context_register());
   context()->Plug(result_register());
 }
 
 
 void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) {
   EmitIntrinsicAsStubCall(expr, CodeFactory::NumberToString(isolate()));
 }
 
 
 void FullCodeGenerator::EmitToString(CallRuntime* expr) {
@@ skipping 690 matching lines @@
   PrepareForBailoutForId(stmt->BackEdgeId(), NO_REGISTERS);
   EmitBackEdgeBookkeeping(stmt, loop_statement.continue_label());
   __ jmp(loop_statement.continue_label());
 
   // Exit and decrement the loop depth.
   PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
   __ bind(loop_statement.break_label());
   decrement_loop_depth();
 }
 
+void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) {
+  LoadFromFrameField(JavaScriptFrameConstants::kFunctionOffset,
+                     result_register());
+  context()->Plug(result_register());
+}
 
 void FullCodeGenerator::VisitTryCatchStatement(TryCatchStatement* stmt) {
   Comment cmnt(masm_, "[ TryCatchStatement");
   SetStatementPosition(stmt, SKIP_BREAK);
 
   // The try block adds a handler to the exception handler chain before
   // entering, and removes it again when exiting normally.  If an exception
   // is thrown during execution of the try block, the handler is consumed
   // and control is passed to the catch block with the exception in the
   // result register.
@@ skipping 656 matching lines @@
   return var->mode() == CONST_LEGACY || var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8