Experimental: add a has_valid_frame predicate to the code generator...

src/register-allocator-ia32.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 75 matching lines @@
     Result fresh = cgen_->allocator()->Allocate(target);
     ASSERT(fresh.is_valid());
     if (is_register()) {
       cgen_->masm()->mov(fresh.reg(), reg());
     } else {
       ASSERT(is_constant());
       cgen_->masm()->Set(fresh.reg(), Immediate(handle()));
     }
     *this = fresh;
   } else if (is_register() && reg().is(target)) {
-    ASSERT(cgen_->frame() != NULL);
+    ASSERT(cgen_->has_valid_frame());
     cgen_->frame()->Spill(target);
     ASSERT(cgen_->allocator()->count(target) == 1);
   }
   ASSERT(is_register());
   ASSERT(reg().is(target));
 }
 
 
 // -------------------------------------------------------------------------
 // RegisterAllocator implementation.
@@ skipping 16 matching lines @@
     }
   }
   return Result(cgen_);
 }
 
 
 Result RegisterAllocator::Allocate() {
   Result result = AllocateWithoutSpilling();
   if (!result.is_valid()) {
     // Ask the current frame to spill a register.
-    ASSERT(cgen_->frame() != NULL);
+    ASSERT(cgen_->has_valid_frame());
     Register free_reg = cgen_->frame()->SpillAnyRegister();
     if (free_reg.is_valid()) {
       ASSERT(!is_used(free_reg));
       return Result(free_reg, cgen_);
     }
   }
   return result;
 }
 
 
 Result RegisterAllocator::Allocate(Register target) {
   // If the target is not referenced, it can simply be allocated.
   if (!is_used(target)) {
     return Result(target, cgen_);
   }
   // If the target is only referenced in the frame, it can be spilled and
   // then allocated.
-  ASSERT(cgen_->frame() != NULL);
+  ASSERT(cgen_->has_valid_frame());
   if (count(target) == cgen_->frame()->register_count(target)) {
     cgen_->frame()->Spill(target);
     ASSERT(!is_used(target));
     return Result(target, cgen_);
   }
   // Otherwise (if it's referenced outside the frame) we cannot allocate it.
   return Result(cgen_);
 }
 
 
 } }  // namespace v8::internal