[turbofan] Frame elision for code stubs

src/compiler/frame-elider.cc

Index: src/compiler/frame-elider.cc
diff --git a/src/compiler/frame-elider.cc b/src/compiler/frame-elider.cc
index bb35643f5dc965c612bc0d9a73f5982a4b9b0aff..a111d32652c05656077490a3a58b3d28d0e41b32 100644
--- a/src/compiler/frame-elider.cc
+++ b/src/compiler/frame-elider.cc
@@ -17,13 +17,13 @@ void FrameElider::Run() {
   MarkDeConstruction();
 }
 
-
 void FrameElider::MarkBlocks() {
   for (InstructionBlock* block : instruction_blocks()) {
     if (block->needs_frame()) continue;
     for (int i = block->code_start(); i < block->code_end(); ++i) {
-      if (InstructionAt(i)->IsCall() ||
-          InstructionAt(i)->opcode() == ArchOpcode::kArchDeoptimize) {
+      const Instruction* instr = InstructionAt(i);
+      if (instr->IsCall() || instr->IsDeoptimizeCall() ||
+          instr->arch_opcode() == ArchOpcode::kArchStackPointer) {
         block->mark_needs_frame();
         break;
       }
@@ -50,6 +50,8 @@ void FrameElider::MarkDeConstruction() {
       for (RpoNumber& succ : block->successors()) {
         if (!InstructionBlockAt(succ)->needs_frame()) {
           DCHECK_EQ(1U, block->SuccessorCount());
+          DCHECK(!code_->InstructionAt(block->last_instruction_index())
+                      ->IsBranch());
           block->mark_must_deconstruct_frame();
         }
       }