Support old-space allocation in generated code (bump block only for now).

runtime/vm/intrinsifier_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 279 matching lines @@
   __ SmiUntag(R2);                                                             \
   /* Check for maximum allowed length. */                                      \
   /* R2: untagged array length. */                                             \
   __ CompareImmediate(R2, max_len, kNoPP);                                     \
   __ b(&fall_through, GT);                                                     \
   __ LslImmediate(R2, R2, scale_shift);                                        \
   const intptr_t fixed_size = sizeof(Raw##type_name) + kObjectAlignment - 1;   \
   __ AddImmediate(R2, R2, fixed_size, kNoPP);                                  \
   __ andi(R2, R2, ~(kObjectAlignment - 1));                                    \
   Heap* heap = Isolate::Current()->heap();                                     \
-                                                                               \
-  __ LoadImmediate(R0, heap->TopAddress(), kNoPP);                             \
+  Heap::Space space = heap->SpaceForAllocation(cid);                           \
+  __ LoadImmediate(R0, heap->TopAddress(space), kNoPP);                        \
   __ ldr(R0, Address(R0, 0));                                                  \
                                                                                \
   /* R2: allocation size. */                                                   \
   __ add(R1, R0, Operand(R2));                                                 \
   __ b(&fall_through, VS);                                                     \
                                                                                \
   /* Check if the allocation fits into the remaining space. */                 \
   /* R0: potential new object start. */                                        \
   /* R1: potential next object start. */                                       \
   /* R2: allocation size. */                                                   \
-  __ LoadImmediate(R3, heap->EndAddress(), kNoPP);                             \
+  __ LoadImmediate(R3, heap->EndAddress(space), kNoPP);                        \
   __ ldr(R3, Address(R3, 0));                                                  \
   __ cmp(R1, Operand(R3));                                                     \
   __ b(&fall_through, CS);                                                     \
                                                                                \
   /* Successfully allocated the object(s), now update top to point to */       \
   /* next object start and initialize the object. */                           \
-  __ LoadImmediate(R3, heap->TopAddress(), kNoPP);                             \
+  __ LoadImmediate(R3, heap->TopAddress(space), kNoPP);                        \
   __ str(R1, Address(R3, 0));                                                  \
   __ AddImmediate(R0, R0, kHeapObjectTag, kNoPP);                              \
-  __ UpdateAllocationStatsWithSize(cid, R2, kNoPP);                            \
+  __ UpdateAllocationStatsWithSize(cid, R2, kNoPP, space);                     \
   /* Initialize the tags. */                                                   \
   /* R0: new object start as a tagged pointer. */                              \
   /* R1: new object end address. */                                            \
   /* R2: allocation size. */                                                   \
   {                                                                            \
     __ CompareImmediate(R2, RawObject::SizeTag::kMaxSizeTag, kNoPP);           \
     __ LslImmediate(R2, R2, RawObject::kSizeTagPos - kObjectAlignmentLog2);    \
     __ csel(R2, ZR, R2, HI);                                                   \
                                                                                \
     /* Get the class index and insert it into the tags. */                     \
@@ skipping 936 matching lines @@
   Label fail;
 
   __ mov(R6, length_reg);  // Save the length register.
   __ SmiUntag(length_reg);
   const intptr_t fixed_size = sizeof(RawString) + kObjectAlignment - 1;
   __ AddImmediate(length_reg, length_reg, fixed_size, kNoPP);
   __ andi(length_reg, length_reg, ~(kObjectAlignment - 1));
 
   Isolate* isolate = Isolate::Current();
   Heap* heap = isolate->heap();
-
-  __ LoadImmediate(R3, heap->TopAddress(), kNoPP);
+  const intptr_t cid = kOneByteStringCid;
+  Heap::Space space = heap->SpaceForAllocation(cid);
+  __ LoadImmediate(R3, heap->TopAddress(space), kNoPP);
   __ ldr(R0, Address(R3));
 
   // length_reg: allocation size.
   __ adds(R1, R0, Operand(length_reg));
   __ b(&fail, VS);  // Fail on overflow.
 
   // Check if the allocation fits into the remaining space.
   // R0: potential new object start.
   // R1: potential next object start.
   // R2: allocation size.
-  // R3: heap->Top->Address().
-  __ LoadImmediate(R7, heap->EndAddress(), kNoPP);
+  // R3: heap->TopAddress(space).
+  __ LoadImmediate(R7, heap->EndAddress(space), kNoPP);
   __ ldr(R7, Address(R7));
   __ cmp(R1, Operand(R7));
   __ b(&fail, CS);
 
   // Successfully allocated the object(s), now update top to point to
   // next object start and initialize the object.
   __ str(R1, Address(R3));
   __ AddImmediate(R0, R0, kHeapObjectTag, kNoPP);
-  __ UpdateAllocationStatsWithSize(kOneByteStringCid, R2, kNoPP);
+  __ UpdateAllocationStatsWithSize(cid, R2, kNoPP, space);
 
   // Initialize the tags.
   // R0: new object start as a tagged pointer.
   // R1: new object end address.
   // R2: allocation size.
   {
     const intptr_t shift = RawObject::kSizeTagPos - kObjectAlignmentLog2;
-    const Class& cls =
-        Class::Handle(isolate->object_store()->one_byte_string_class());
 
     __ CompareImmediate(R2, RawObject::SizeTag::kMaxSizeTag, kNoPP);
     __ LslImmediate(R2, R2, shift);
     __ csel(R2, R2, ZR, LS);
 
     // Get the class index and insert it into the tags.
     // R2: size and bit tags.
-    __ LoadImmediate(TMP, RawObject::ClassIdTag::encode(cls.id()), kNoPP);
+    __ LoadImmediate(TMP, RawObject::ClassIdTag::encode(cid), kNoPP);
     __ orr(R2, R2, Operand(TMP));
     __ str(R2, FieldAddress(R0, String::tags_offset()));  // Store tags.
   }
 
   // Set the length field using the saved length (R6).
   __ StoreIntoObjectNoBarrier(R0,
                               FieldAddress(R0, String::length_offset()),
                               R6);
   // Clear hash.
   __ mov(TMP, ZR);
@@ skipping 199 matching lines @@
   Isolate* isolate = Isolate::Current();
   __ LoadImmediate(R1, reinterpret_cast<uword>(isolate), kNoPP);
   // Set return value to Isolate::current_tag_.
   __ ldr(R0, Address(R1, Isolate::current_tag_offset()));
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64