diff options
Diffstat (limited to 'compiler/optimizing/intrinsics_arm64.cc')
| -rw-r--r-- | compiler/optimizing/intrinsics_arm64.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/optimizing/intrinsics_arm64.cc b/compiler/optimizing/intrinsics_arm64.cc index ca790f655a..ec5d17a443 100644 --- a/compiler/optimizing/intrinsics_arm64.cc +++ b/compiler/optimizing/intrinsics_arm64.cc @@ -1464,8 +1464,16 @@ void IntrinsicCodeGeneratorARM64::VisitStringEquals(HInvoke* invoke) { // All string objects must have the same type since String cannot be subclassed. // Receiver must be a string object, so its class field is equal to all strings' class fields. // If the argument is a string object, its class field must be equal to receiver's class field. + // + // As the String class is expected to be non-movable, we can read the class + // field from String.equals' arguments without read barriers. + AssertNonMovableStringClass(); + // /* HeapReference<Class> */ temp = str->klass_ __ Ldr(temp, MemOperand(str.X(), class_offset)); + // /* HeapReference<Class> */ temp1 = arg->klass_ __ Ldr(temp1, MemOperand(arg.X(), class_offset)); + // Also, because we use the previously loaded class references only in the + // following comparison, we don't need to unpoison them. __ Cmp(temp, temp1); __ B(&return_false, ne); } |