Require Import Coqlib Compopts.
Require Import AST Integers Floats Values Memory Globalenvs.
Require Import Op SSA ValueDomain ValueDomainSSA.
Value analysis for x86_64 operators
Definition eval_static_condition (
cond:
condition) (
vl:
list aval):
abool :=
match cond,
vl with
|
Ccomp c,
v1 ::
v2 ::
nil =>
cmp_bool c v1 v2
|
Ccompu c,
v1 ::
v2 ::
nil =>
cmpu_bool c v1 v2
|
Ccompimm c n,
v1 ::
nil =>
cmp_bool c v1 (
I n)
|
Ccompuimm c n,
v1 ::
nil =>
cmpu_bool c v1 (
I n)
|
Ccompl c,
v1 ::
v2 ::
nil =>
cmpl_bool c v1 v2
|
Ccomplu c,
v1 ::
v2 ::
nil =>
cmplu_bool c v1 v2
|
Ccomplimm c n,
v1 ::
nil =>
cmpl_bool c v1 (
L n)
|
Ccompluimm c n,
v1 ::
nil =>
cmplu_bool c v1 (
L n)
|
Ccompf c,
v1 ::
v2 ::
nil =>
cmpf_bool c v1 v2
|
Cnotcompf c,
v1 ::
v2 ::
nil =>
cnot (
cmpf_bool c v1 v2)
|
Ccompfs c,
v1 ::
v2 ::
nil =>
cmpfs_bool c v1 v2
|
Cnotcompfs c,
v1 ::
v2 ::
nil =>
cnot (
cmpfs_bool c v1 v2)
|
Cmaskzero n,
v1 ::
nil =>
maskzero v1 n
|
Cmasknotzero n,
v1 ::
nil =>
cnot (
maskzero v1 n)
|
_,
_ =>
Bnone
end.
Definition eval_static_addressing_32 (
addr:
addressing) (
vl:
list aval):
aval :=
match addr,
vl with
|
Aindexed n,
v1::
nil =>
add v1 (
I (
Int.repr n))
|
Aindexed2 n,
v1::
v2::
nil =>
add (
add v1 v2) (
I (
Int.repr n))
|
Ascaled sc ofs,
v1::
nil =>
add (
mul v1 (
I (
Int.repr sc))) (
I (
Int.repr ofs))
|
Aindexed2scaled sc ofs,
v1::
v2::
nil =>
add v1 (
add (
mul v2 (
I (
Int.repr sc))) (
I (
Int.repr ofs)))
|
Aglobal _ _,
nil =>
Vtop
|
Abased _ _,
_::
nil =>
Vtop
|
Abasedscaled _ _ _,
_::
nil =>
Vtop
|
Ainstack _,
nil =>
Vtop
|
_,
_ =>
Vbot
end.
Definition eval_static_addressing_64 (
addr:
addressing) (
vl:
list aval):
aval :=
match addr,
vl with
|
Aindexed n,
v1::
nil =>
addl v1 (
L (
Int64.repr n))
|
Aindexed2 n,
v1::
v2::
nil =>
addl (
addl v1 v2) (
L (
Int64.repr n))
|
Ascaled sc ofs,
v1::
nil =>
addl (
mull v1 (
L (
Int64.repr sc))) (
L (
Int64.repr ofs))
|
Aindexed2scaled sc ofs,
v1::
v2::
nil =>
addl v1 (
addl (
mull v2 (
L (
Int64.repr sc))) (
L (
Int64.repr ofs)))
|
Aglobal _ _,
nil =>
Vtop
|
Abased _ _,
_::
nil =>
Vtop
|
Abasedscaled _ _ _,
_::
nil =>
Vtop
|
Ainstack _,
nil =>
Vtop
|
_,
_ =>
Vbot
end.
Definition eval_static_addressing (
addr:
addressing) (
vl:
list aval):
aval :=
if Archi.ptr64
then eval_static_addressing_64 addr vl
else eval_static_addressing_32 addr vl.
Definition eval_static_operation (
op:
operation) (
vl:
list aval):
aval :=
match op,
vl with
|
Omove,
v1::
nil =>
v1
|
Ointconst n,
nil =>
I n
|
Olongconst n,
nil =>
L n
|
Ofloatconst n,
nil =>
if propagate_float_constants tt then F n else Vtop
|
Osingleconst n,
nil =>
if propagate_float_constants tt then FS n else Vtop
|
Oindirectsymbol id,
nil =>
Vtop
|
Ocast8signed,
v1 ::
nil =>
sign_ext 8
v1
|
Ocast8unsigned,
v1 ::
nil =>
zero_ext 8
v1
|
Ocast16signed,
v1 ::
nil =>
sign_ext 16
v1
|
Ocast16unsigned,
v1 ::
nil =>
zero_ext 16
v1
|
Oneg,
v1::
nil =>
neg v1
|
Osub,
v1::
v2::
nil =>
sub v1 v2
|
Omul,
v1::
v2::
nil =>
mul v1 v2
|
Omulimm n,
v1::
nil =>
mul v1 (
I n)
|
Omulhs,
v1::
v2::
nil =>
mulhs v1 v2
|
Omulhu,
v1::
v2::
nil =>
mulhu v1 v2
|
Odiv,
v1::
v2::
nil =>
divs v1 v2
|
Odivu,
v1::
v2::
nil =>
divu v1 v2
|
Omod,
v1::
v2::
nil =>
mods v1 v2
|
Omodu,
v1::
v2::
nil =>
modu v1 v2
|
Oand,
v1::
v2::
nil =>
and v1 v2
|
Oandimm n,
v1::
nil =>
and v1 (
I n)
|
Oor,
v1::
v2::
nil =>
or v1 v2
|
Oorimm n,
v1::
nil =>
or v1 (
I n)
|
Oxor,
v1::
v2::
nil =>
xor v1 v2
|
Oxorimm n,
v1::
nil =>
xor v1 (
I n)
|
Onot,
v1::
nil =>
notint v1
|
Oshl,
v1::
v2::
nil =>
shl v1 v2
|
Oshlimm n,
v1::
nil =>
shl v1 (
I n)
|
Oshr,
v1::
v2::
nil =>
shr v1 v2
|
Oshrimm n,
v1::
nil =>
shr v1 (
I n)
|
Oshrximm n,
v1::
nil =>
shrx v1 (
I n)
|
Oshru,
v1::
v2::
nil =>
shru v1 v2
|
Oshruimm n,
v1::
nil =>
shru v1 (
I n)
|
Ororimm n,
v1::
nil =>
ror v1 (
I n)
|
Oshldimm n,
v1::
v2::
nil =>
or (
shl v1 (
I n)) (
shru v2 (
I (
Int.sub Int.iwordsize n)))
|
Olea addr,
_ =>
eval_static_addressing_32 addr vl
|
Omakelong,
v1::
v2::
nil =>
longofwords v1 v2
|
Olowlong,
v1::
nil =>
loword v1
|
Ohighlong,
v1::
nil =>
hiword v1
|
Ocast32signed,
v1::
nil =>
longofint v1
|
Ocast32unsigned,
v1::
nil =>
longofintu v1
|
Onegl,
v1::
nil =>
negl v1
|
Oaddlimm n,
v1::
nil =>
addl v1 (
L n)
|
Osubl,
v1::
v2::
nil =>
subl v1 v2
|
Omull,
v1::
v2::
nil =>
mull v1 v2
|
Omullimm n,
v1::
nil =>
mull v1 (
L n)
|
Omullhs,
v1::
v2::
nil =>
mullhs v1 v2
|
Omullhu,
v1::
v2::
nil =>
mullhu v1 v2
|
Odivl,
v1::
v2::
nil =>
divls v1 v2
|
Odivlu,
v1::
v2::
nil =>
divlu v1 v2
|
Omodl,
v1::
v2::
nil =>
modls v1 v2
|
Omodlu,
v1::
v2::
nil =>
modlu v1 v2
|
Oandl,
v1::
v2::
nil =>
andl v1 v2
|
Oandlimm n,
v1::
nil =>
andl v1 (
L n)
|
Oorl,
v1::
v2::
nil =>
orl v1 v2
|
Oorlimm n,
v1::
nil =>
orl v1 (
L n)
|
Oxorl,
v1::
v2::
nil =>
xorl v1 v2
|
Oxorlimm n,
v1::
nil =>
xorl v1 (
L n)
|
Onotl,
v1::
nil =>
notl v1
|
Oshll,
v1::
v2::
nil =>
shll v1 v2
|
Oshllimm n,
v1::
nil =>
shll v1 (
I n)
|
Oshrl,
v1::
v2::
nil =>
shrl v1 v2
|
Oshrlimm n,
v1::
nil =>
shrl v1 (
I n)
|
Oshrxlimm n,
v1::
nil =>
shrxl v1 (
I n)
|
Oshrlu,
v1::
v2::
nil =>
shrlu v1 v2
|
Oshrluimm n,
v1::
nil =>
shrlu v1 (
I n)
|
Ororlimm n,
v1::
nil =>
rorl v1 (
I n)
|
Oleal addr,
_ =>
eval_static_addressing_64 addr vl
|
Onegf,
v1::
nil =>
negf v1
|
Oabsf,
v1::
nil =>
absf v1
|
Oaddf,
v1::
v2::
nil =>
addf v1 v2
|
Osubf,
v1::
v2::
nil =>
subf v1 v2
|
Omulf,
v1::
v2::
nil =>
mulf v1 v2
|
Odivf,
v1::
v2::
nil =>
divf v1 v2
|
Onegfs,
v1::
nil =>
negfs v1
|
Oabsfs,
v1::
nil =>
absfs v1
|
Oaddfs,
v1::
v2::
nil =>
addfs v1 v2
|
Osubfs,
v1::
v2::
nil =>
subfs v1 v2
|
Omulfs,
v1::
v2::
nil =>
mulfs v1 v2
|
Odivfs,
v1::
v2::
nil =>
divfs v1 v2
|
Osingleoffloat,
v1::
nil =>
singleoffloat v1
|
Ofloatofsingle,
v1::
nil =>
floatofsingle v1
|
Ointoffloat,
v1::
nil =>
intoffloat v1
|
Ofloatofint,
v1::
nil =>
floatofint v1
|
Ointofsingle,
v1::
nil =>
intofsingle v1
|
Osingleofint,
v1::
nil =>
singleofint v1
|
Olongoffloat,
v1::
nil =>
longoffloat v1
|
Ofloatoflong,
v1::
nil =>
floatoflong v1
|
Olongofsingle,
v1::
nil =>
longofsingle v1
|
Osingleoflong,
v1::
nil =>
singleoflong v1
|
Ocmp c,
_ =>
of_optbool (
eval_static_condition c vl)
|
_,
_ =>
Vbot
end.
Section SOUNDNESS.
Theorem eval_static_condition_sound:
forall cond vargs m aargs,
list_forall2 vmatch vargs aargs ->
cmatch (
eval_condition cond vargs m) (
eval_static_condition cond aargs).
Proof.
intros until aargs; intros VM. inv VM.
destruct cond; auto with va.
inv H0.
destruct cond; simpl; eauto with va.
inv H2.
destruct cond; simpl; eauto with va.
destruct cond; auto with va.
Qed.
Ltac InvHyps :=
match goal with
| [
H:
None =
Some _ |-
_ ] =>
discriminate
| [
H:
Some _ =
Some _ |-
_] =>
inv H
| [
H1:
match ?
vl with nil =>
_ |
_ ::
_ =>
_ end =
Some _ ,
H2:
list_forall2 _ ?
vl _ |-
_ ] =>
inv H2;
InvHyps
| [
H: (
if Archi.ptr64 then _ else _) =
Some _ |-
_] =>
destruct Archi.ptr64 eqn:?;
InvHyps
|
_ =>
idtac
end.
Theorem eval_static_addressing_32_sound:
forall (
ge:
genv)
sp addr vargs vres aargs,
eval_addressing32 ge sp addr vargs =
Some vres ->
list_forall2 vmatch vargs aargs ->
vmatch vres (
eval_static_addressing_32 addr aargs).
Proof.
Theorem eval_static_addressing_64_sound:
forall (
ge:
genv)
sp addr vargs vres aargs,
eval_addressing64 ge sp addr vargs =
Some vres ->
list_forall2 vmatch vargs aargs ->
vmatch vres (
eval_static_addressing_64 addr aargs).
Proof.
Theorem eval_static_addressing_sound:
forall (
ge:
genv)
sp addr vargs vres aargs,
eval_addressing ge sp addr vargs =
Some vres ->
list_forall2 vmatch vargs aargs ->
vmatch vres (
eval_static_addressing addr aargs).
Proof.
Theorem eval_static_operation_sound:
forall (
ge:
genv)
sp op vargs m vres aargs,
eval_operation ge sp op vargs m =
Some vres ->
list_forall2 vmatch vargs aargs ->
vmatch vres (
eval_static_operation op aargs).
Proof.
End SOUNDNESS.