[runtime] Unify and simplify how frames are marked

src/ia32/deoptimizer-ia32.cc

Index: src/ia32/deoptimizer-ia32.cc
diff --git a/src/ia32/deoptimizer-ia32.cc b/src/ia32/deoptimizer-ia32.cc
index a3756ae443b81bc697c8442cfa8822279f3e0d2f..bd27de5dce982b8b4cc9a2887c46a1fcb6e688eb 100644
--- a/src/ia32/deoptimizer-ia32.cc
+++ b/src/ia32/deoptimizer-ia32.cc
@@ -240,7 +240,12 @@ void Deoptimizer::TableEntryGenerator::Generate() {
 
   // Allocate a new deoptimizer object.
   __ PrepareCallCFunction(6, eax);
+  __ mov(eax, Immediate(0));
+  Label context_check;
+  __ mov(edi, Operand(ebp, StandardFrameConstants::kContextOffset));
+  __ JumpIfSmi(edi, &context_check);
   __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
+  __ bind(&context_check);
   __ mov(Operand(esp, 0 * kPointerSize), eax);  // Function.
   __ mov(Operand(esp, 1 * kPointerSize), Immediate(type()));  // Bailout type.
   __ mov(Operand(esp, 2 * kPointerSize), ebx);  // Bailout id.