[ia32,root] Port four more trivial builtins

FrameDropperTrampoline
HandleDebuggerStatement
InstantiateAsmJs
NotifyDeoptimized

Bug: v8:6666
Change-Id: I4189e5dcf82eddd1dbce43b10b04c8e6a980123c
Reviewed-on: https://chromium-review.googlesource.com/1235922Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56081}

src/builtins/ia32/builtins-ia32.cc

@@ -1266,6 +1266,8 @@ void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) {
 }
 
 void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) {
+  Assembler::SupportsRootRegisterScope supports_root_register(masm);
+
   // ----------- S t a t e -------------
   //  -- eax : argument count (preserved for callee)
   //  -- edx : new target (preserved for callee)
@@ -1317,10 +1319,10 @@ void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) {
     __ SmiUntag(ecx);
     scope.GenerateLeaveFrame();
 
-    __ PopReturnAddressTo(ebx);
+    __ PopReturnAddressTo(edx);
     __ inc(ecx);
     __ lea(esp, Operand(esp, ecx, times_pointer_size, 0));
-    __ PushReturnAddressFrom(ebx);
+    __ PushReturnAddressFrom(edx);
     __ ret(0);
 
     __ bind(&failed);
@@ -1390,6 +1392,8 @@ void Builtins::Generate_ContinueToJavaScriptBuiltinWithResult(
 }
 
 void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
+  Assembler::SupportsRootRegisterScope supports_root_register(masm);
+
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     __ CallRuntime(Runtime::kNotifyDeoptimized);

src/debug/ia32/debug-ia32.cc

@@ -16,6 +16,8 @@ namespace internal {
 #define __ ACCESS_MASM(masm)
 
 void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
+  Assembler::SupportsRootRegisterScope supports_root_register(masm);
+
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
@@ -27,6 +29,8 @@ void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
 }
 
 void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
+  Assembler::SupportsRootRegisterScope supports_root_register(masm);
+
   // Frame is being dropped:
   // - Drop to the target frame specified by eax.
   // - Look up current function on the frame.