for the following python:
import __pyston__
class Foo(object):
def foo(self):
print "hi"
__pyston__.clearStats()
f = Foo()
f.foo()the callattr for the line:
f.foo()expands to this IC slot:
; from getattrInternalEx
0x7ffff7ff3244 <<module>_e1_0+12868>: mov (%rdi),%rax ; load f->cls
0x7ffff7ff3247 <<module>_e1_0+12871>: cmpq $0x0,0x38(%rax) ; addAttrGuard (f->cls->tp_getattr)
0x7ffff7ff324f <<module>_e1_0+12879>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
0x7ffff7ff3255 <<module>_e1_0+12885>: cmpq $0x850740,0x88(%rax) ; addAttrGuard (f->cls->tp_getattro)
0x7ffff7ff3260 <<module>_e1_0+12896>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
; from typeLookup
0x7ffff7ff3266 <<module>_e1_0+12902>: mov (%rdi),%rax ; load f->cls
0x7ffff7ff3269 <<module>_e1_0+12905>: movabs $0x12700037e8,%r8 ; addAttrGuard (f->cls->total_shape)
0x7ffff7ff3273 <<module>_e1_0+12915>: cmp 0x1e8(%rax),%r8
0x7ffff7ff327a <<module>_e1_0+12922>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
0x7ffff7ff3280 <<module>_e1_0+12928>: mov 0x150(%rax),%rax ; getAttr(f->cls->tp_mro)
0x7ffff7ff3287 <<module>_e1_0+12935>: mov 0x10(%rax),%rax ; getAttr(f->cls->tp_mro[0])
0x7ffff7ff328b <<module>_e1_0+12939>: mov (%rax),%rax ; load class at tp_mro[0]
0x7ffff7ff328e <<module>_e1_0+12942>: mov 0x188(%rax),%rax ; load pointer to hcattr attr_vals
0x7ffff7ff3295 <<module>_e1_0+12949>: mov 0x18(%rax),%rax ; load pointer for 'foo' function
; from getattrInternalGeneric
0x7ffff7ff3299 <<module>_e1_0+12953>: movabs $0x2270010020,%r8 ; addAttrGuard(foo->cls == function)
0x7ffff7ff32a3 <<module>_e1_0+12963>: cmp (%rax),%r8 ;
0x7ffff7ff32a6 <<module>_e1_0+12966>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
; from getattr
0x7ffff7ff32ac <<module>_e1_0+12972>: movabs $0x22700c3020,%r8 ; addAttrGuard(f->cls == Foo)
0x7ffff7ff32b6 <<module>_e1_0+12982>: cmp (%rdi),%r8
0x7ffff7ff32b9 <<module>_e1_0+12985>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
0x7ffff7ff32bf <<module>_e1_0+12991>: movabs $0x12700040e8,%r8 ; addAttrGuard(hcattrs/hidden class)
0x7ffff7ff32c9 <<module>_e1_0+13001>: cmp 0x8(%rdi),%r8
0x7ffff7ff32cd <<module>_e1_0+13005>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
0x7ffff7ff32d3 <<module>_e1_0+13011>: mov (%rdi),%r8
; normally the load from the instance attr
; happens here, but we don't have an instance
; attr named 'foo', so the above guards
; are wasted.
; from callattrInternal
0x7ffff7ff32d6 <<module>_e1_0+13014>: movabs $0x1270085868,%r8 ; addGuard(foo is the BoxedFunction we expect)
0x7ffff7ff32e0 <<module>_e1_0+13024>: cmp %rax,%r8
0x7ffff7ff32e3 <<module>_e1_0+13027>: jne 0x7ffff7ff34c3 <<module>_e1_0+13507>
; from rewriter->call
0x7ffff7ff32e9 <<module>_e1_0+13033>: movabs $0x20fad0c,%rax ; increment "inside this slot"
0x7ffff7ff32f3 <<module>_e1_0+13043>: incl (%rax)
0x7ffff7ff32f5 <<module>_e1_0+13045>: movabs $0x7ffff7fde000,%r11 ; do the actual call to the jitted method
0x7ffff7ff32ff <<module>_e1_0+13055>: callq *%r11
0x7ffff7ff3302 <<module>_e1_0+13058>: movabs $0x20fad0c,%rcx ; decrement "inside this slot"
0x7ffff7ff330c <<module>_e1_0+13068>: decl (%rcx)
0x7ffff7ff330e <<module>_e1_0+13070>: jmpq 0x7ffff7ff3ca2 <<module>_e1_0+15522> ; jump to continue point