diff options
Diffstat (limited to 'x86/ConstpropOp.vp')
| -rw-r--r-- | x86/ConstpropOp.vp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/x86/ConstpropOp.vp b/x86/ConstpropOp.vp index f59b9dba..ada8d54a 100644 --- a/x86/ConstpropOp.vp +++ b/x86/ConstpropOp.vp @@ -16,7 +16,7 @@ Require Import Coqlib Compopts. Require Import AST Integers Floats. Require Import Op Registers. -Require Import ValueDomain. +Require Import ValueDomain ValueAOp. (** * Converting known values to constants *) @@ -98,6 +98,15 @@ Nondetfunction make_cmp (c: condition) (args: list reg) (vl: list aval) := make_cmp_base c args vl end. +Definition make_select (c: condition) (ty: typ) + (r1 r2: reg) (args: list reg) (vl: list aval) := + match resolve_branch (eval_static_condition c vl) with + | Some b => (Omove, (if b then r1 else r2) :: nil) + | None => + let (c', args') := cond_strength_reduction c args vl in + (Osel c' ty, r1 :: r2 :: args') + end. + (** For addressing modes, we need to distinguish - reductions that produce pointers (i.e. that produce [Aglobal], [Ainstack], [Abased] and [Abasedscaled] addressing modes), which are valid only if the pointer size is right; - other reductions (producing [Aindexed] or [Aindexed2] modes), which are valid independently of the pointer size. @@ -416,6 +425,7 @@ Nondetfunction op_strength_reduction let (addr', args') := addr_strength_reduction_64 addr args vl in (Oleal addr', args') | Ocmp c, args, vl => make_cmp c args vl + | Osel c ty, r1 :: r2 :: args, v1 :: v2 :: vl => make_select c ty r1 r2 args vl | Omulf, r1 :: r2 :: nil, v1 :: F n2 :: nil => make_mulfimm n2 r1 r1 r2 | Omulf, r1 :: r2 :: nil, F n1 :: v2 :: nil => make_mulfimm n1 r2 r1 r2 | Omulfs, r1 :: r2 :: nil, v1 :: FS n2 :: nil => make_mulfsimm n2 r1 r1 r2 |