X87: [generators] Store the resume mode in the generator object.

src/full-codegen/x87/full-codegen-x87.cc

Index: src/full-codegen/x87/full-codegen-x87.cc
diff --git a/src/full-codegen/x87/full-codegen-x87.cc b/src/full-codegen/x87/full-codegen-x87.cc
index 485ce9e8dcf217d756e0c9be2fec1a773fae684b..f5b50d15bf6ed555aae843dcc910b5d0ce8ff9e4 100644
--- a/src/full-codegen/x87/full-codegen-x87.cc
+++ b/src/full-codegen/x87/full-codegen-x87.cc
@@ -1752,11 +1752,10 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
 
   __ jmp(&suspend);
   __ bind(&continuation);
-  // When we arrive here, the stack top is the resume mode and
-  // result_register() holds the input value (the argument given to the
-  // respective resume operation).
+  // When we arrive here, eax holds the generator object.
   __ RecordGeneratorContinuation();
-  __ pop(ebx);
+  __ mov(ebx, FieldOperand(eax, JSGeneratorObject::kResumeModeOffset));
+  __ mov(eax, FieldOperand(eax, JSGeneratorObject::kInputOffset));
   STATIC_ASSERT(JSGeneratorObject::kNext < JSGeneratorObject::kReturn);
   STATIC_ASSERT(JSGeneratorObject::kThrow > JSGeneratorObject::kReturn);
   __ cmp(ebx, Immediate(Smi::FromInt(JSGeneratorObject::kReturn)));