Drop computed handler count and index from AST.

src/arm64/full-codegen-arm64.cc

Index: src/arm64/full-codegen-arm64.cc
diff --git a/src/arm64/full-codegen-arm64.cc b/src/arm64/full-codegen-arm64.cc
index cdc615ea5a2c1e81affebbea57cb01f104d41a3d..90b57784d9eb75708bd45229ee63f3874c0ef067 100644
--- a/src/arm64/full-codegen-arm64.cc
+++ b/src/arm64/full-codegen-arm64.cc
@@ -103,10 +103,6 @@ class JumpPatchSite BASE_EMBEDDED {
 // frames-arm.h for its layout.
 void FullCodeGenerator::Generate() {
   CompilationInfo* info = info_;
-  handler_table_ =
-      Handle<HandlerTable>::cast(isolate()->factory()->NewFixedArray(
-          HandlerTable::LengthForRange(function()->handler_count()), TENURED));
-
   profiling_counter_ = isolate()->factory()->NewCell(
       Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
@@ -5141,7 +5137,8 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       // re-boxing.
       __ Bind(&l_try);
       __ Pop(x0);                                        // result
-      EnterTryBlock(expr->index(), &l_catch);
+      int handler_index = NewHandlerTableEntry();
+      EnterTryBlock(handler_index, &l_catch);
       const int try_block_size = TryCatch::kElementCount * kPointerSize;
       __ Push(x0);                                       // result
       __ B(&l_suspend);
@@ -5156,7 +5153,7 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       const int generator_object_depth = kPointerSize + try_block_size;
       __ Peek(x0, generator_object_depth);
       __ Push(x0);                                       // g
-      __ Push(Smi::FromInt(expr->index()));              // handler-index
+      __ Push(Smi::FromInt(handler_index));              // handler-index
       DCHECK((l_continuation.pos() > 0) && Smi::IsValid(l_continuation.pos()));
       __ Mov(x1, Smi::FromInt(l_continuation.pos()));
       __ Str(x1, FieldMemOperand(x0, JSGeneratorObject::kContinuationOffset));
@@ -5169,7 +5166,7 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       __ Pop(x0);                                        // result
       EmitReturnSequence();
       __ Bind(&l_resume);                                // received in x0
-      ExitTryBlock(expr->index());
+      ExitTryBlock(handler_index);
 
       // receiver = iter; f = 'next'; arg = received;
       __ Bind(&l_next);