ARM64: Access has_pending_message_ correctly.

This fixes accesses in ARM and ARM64; the field is a bool, with size 1,
but we were accessing it with pointer-sized loads and stores.

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/230553004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20771 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/full-codegen-arm.cc

@@ -4767,7 +4767,8 @@ void FullCodeGenerator::EnterFinallyBlock() {
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());
   __ mov(ip, Operand(has_pending_message));
-  __ ldr(r1, MemOperand(ip));
+  STATIC_ASSERT(sizeof(bool) == 1);   // NOLINT(runtime/sizeof)
+  __ ldrb(r1, MemOperand(ip));
   __ SmiTag(r1);
   __ push(r1);
 
@@ -4793,7 +4794,8 @@ void FullCodeGenerator::ExitFinallyBlock() {
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());
   __ mov(ip, Operand(has_pending_message));
-  __ str(r1, MemOperand(ip));
+  STATIC_ASSERT(sizeof(bool) == 1);   // NOLINT(runtime/sizeof)
+  __ strb(r1, MemOperand(ip));
 
   __ pop(r1);
   ExternalReference pending_message_obj =

src/arm64/full-codegen-arm64.cc

@@ -4821,8 +4821,9 @@ void FullCodeGenerator::EnterFinallyBlock() {
 
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());
+  STATIC_ASSERT(sizeof(bool) == 1);   // NOLINT(runtime/sizeof)
   __ Mov(x11, has_pending_message);
-  __ Ldr(x11, MemOperand(x11));
+  __ Ldrb(x11, MemOperand(x11));
   __ SmiTag(x11);
 
   __ Push(x10, x11);
@@ -4850,7 +4851,8 @@ void FullCodeGenerator::ExitFinallyBlock() {
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());
   __ Mov(x13, has_pending_message);
-  __ Str(x11, MemOperand(x13));
+  STATIC_ASSERT(sizeof(bool) == 1);   // NOLINT(runtime/sizeof)
+  __ Strb(x11, MemOperand(x13));
 
   ExternalReference pending_message_obj =
       ExternalReference::address_of_pending_message_obj(isolate());