Merge pull request #1934 from GaloisInc/T1859-mir_tuple_value

`mir_tuple_value`

Author: mergify[bot]

crucible-mir-comp/src/Mir/Compositional/Builder.hs

@@ -636,6 +636,7 @@ substMethodSpec sc sm ms = do
         MS.SetupTerm tt -> MS.SetupTerm <$> goTypedTerm tt
         MS.SetupNull _ -> return sv
         MS.SetupStruct b svs -> MS.SetupStruct b <$> mapM goSetupValue svs
+        MS.SetupTuple b svs -> MS.SetupTuple b <$> mapM goSetupValue svs
         MS.SetupArray b svs -> MS.SetupArray b <$> mapM goSetupValue svs
         MS.SetupElem b sv idx -> MS.SetupElem b <$> goSetupValue sv <*> pure idx
         MS.SetupField b sv name -> MS.SetupField b <$> goSetupValue sv <*> pure name
@@ -677,14 +678,14 @@ regToSetup bak p eval shp rv = go shp rv
 
     go :: forall tp. TypeShape tp -> RegValue sym tp ->
         BuilderT sym t (OverrideSim p sym MIR rtp args ret) (MS.SetupValue MIR)
-    go (UnitShape _) () = return $ MS.SetupStruct () []
+    go (UnitShape _) () = return $ MS.SetupTuple () []
     go (PrimShape _ btpr) expr = do
         -- Record all vars used in `expr`
         cache <- use msbVisitCache
         visitExprVars cache expr $ \var -> do
             msbPrePost p . seVars %= Set.insert (Some var)
         liftIO $ MS.SetupTerm <$> eval btpr expr
-    go (TupleShape _ _ flds) rvs = MS.SetupStruct () <$> goFields flds rvs
+    go (TupleShape _ _ flds) rvs = MS.SetupTuple () <$> goFields flds rvs
     go (ArrayShape _ elemTy shp) vec = do
         svs <- case vec of
             MirVector_Vector v -> mapM (go shp) (toList v)

crucible-mir-comp/src/Mir/Compositional/Override.hs

@@ -356,7 +356,7 @@ matchArg sym sc eval allocSpecs md shp rv sv = go shp rv sv
   where
     go :: forall tp. TypeShape tp -> RegValue sym tp -> MS.SetupValue MIR ->
         MirOverrideMatcher sym ()
-    go (UnitShape _) () (MS.SetupStruct () []) = return ()
+    go (UnitShape _) () (MS.SetupTuple () []) = return ()
     go (PrimShape _ _btpr) expr (MS.SetupTerm tt) = do
         loc <- use MS.osLocation
         exprTerm <- liftIO $ eval expr
@@ -390,7 +390,7 @@ matchArg sym sc eval allocSpecs md shp rv sv = go shp rv sv
                         ("mismatch on " ++ show (W4.exprType expr) ++ ": expected " ++
                             show (W4.printSymExpr val))
                         ""
-    go (TupleShape _ _ flds) rvs (MS.SetupStruct () svs) = goFields flds rvs svs
+    go (TupleShape _ _ flds) rvs (MS.SetupTuple () svs) = goFields flds rvs svs
     go (ArrayShape _ _ shp) vec (MS.SetupArray _ svs) = case vec of
         MirVector_Vector v -> zipWithM_ (\x y -> go shp x y) (toList v) svs
         MirVector_PartialVector pv -> forM_ (zip (toList pv) svs) $ \(p, sv) -> do
@@ -510,7 +510,7 @@ setupToReg :: forall sym t st fs tp.
 setupToReg sym sc termSub regMap allocMap shp sv = go shp sv
   where
     go :: forall tp. TypeShape tp -> MS.SetupValue MIR -> IO (RegValue sym tp)
-    go (UnitShape _) (MS.SetupStruct _ []) = return ()
+    go (UnitShape _) (MS.SetupTuple _ []) = return ()
     go (PrimShape _ btpr) (MS.SetupTerm tt) = do
         term <- liftIO $ SAW.scInstantiateExt sc termSub $ SAW.ttTerm tt
         Some expr <- termToExpr sym sc regMap term
@@ -519,7 +519,7 @@ setupToReg sym sc termSub regMap allocMap shp sv = go shp sv
             Nothing -> error $ "setupToReg: expected " ++ show btpr ++ ", but got " ++
                 show (W4.exprType expr)
         return expr
-    go (TupleShape _ _ flds) (MS.SetupStruct _ svs) = goFields flds svs
+    go (TupleShape _ _ flds) (MS.SetupTuple _ svs) = goFields flds svs
     go (ArrayShape _ _ shp) (MS.SetupArray _ svs) = do
         rvs <- mapM (go shp) svs
         return $ MirVector_Vector $ V.fromList rvs

doc/manual/manual.md

@@ -2435,9 +2435,9 @@ The experimental MIR implementation also has a `mir_alloc` function, which
 behaves similarly to `llvm_alloc`. `mir_alloc` creates an immutable reference,
 but there is also a `mir_alloc_mut` function for creating a mutable reference:
 
-* `mir_alloc : MIRType -> MIRSetup SetupValue`
+* `mir_alloc : MIRType -> MIRSetup MIRValue`
 
-* `mir_alloc_mut : MIRType -> MIRSetup SetupValue`
+* `mir_alloc_mut : MIRType -> MIRSetup MIRValue`
 
 MIR tracks whether references are mutable or immutable at the type level, so it
 is important to use the right allocation command for a given reference type.
@@ -2538,7 +2538,7 @@ value.
 
 MIR verification has a single `mir_points_to` command:
 
-* `mir_points_to : SetupValue -> SetupValue -> MIRSetup ()`
+* `mir_points_to : MIRValue -> MIRValue -> MIRSetup ()`
 takes two `SetupValue` arguments, the first of which must be a reference,
 and states that the memory specified by that reference should contain the
 value given in the second argument (which may be any type of
@@ -2624,9 +2624,11 @@ specifies the name of an object field.
 In the experimental MIR verification implementation, the following functions
 construct compound values:
 
-* `mir_array_value : MIRType -> [SetupValue] -> SetupValue` constructs an array
+* `mir_array_value : MIRType -> [MIRValue] -> MIRValue` constructs an array
   of the given type whose elements consist of the given values. Supplying the
   element type is necessary to support length-0 arrays.
+* `mir_tuple_value : [MIRValue] -> MIRValue` construct a tuple with the given
+  list of values as elements.
 
 ### Bitfields
 

intTests/test_mir_verify_tuples/Makefile

@@ -0,0 +1,13 @@
+all: test.linked-mir.json
+
+test.linked-mir.json: test.rs
+	saw-rustc $<
+	$(MAKE) remove-unused-build-artifacts
+
+.PHONY: remove-unused-build-artifacts
+remove-unused-build-artifacts:
+	rm -f test libtest.mir libtest.rlib
+
+.PHONY: clean
+clean: remove-unused-build-artifacts
+	rm -f test.linked-mir.json

intTests/test_mir_verify_tuples/test.linked-mir.json

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intTests/test_mir_verify_tuples/test.rs

@@ -0,0 +1,14 @@
+pub fn f(s: (u32, u32)) -> (u32, u32) {
+    (s.1.wrapping_add(1), s.0.wrapping_add(2))
+}
+
+pub fn g(s: &(u32, u32)) -> (u32, u32) {
+    (s.1.wrapping_add(1), s.0.wrapping_add(2))
+}
+
+pub fn h(s: &mut (u32, u32)) {
+    let x = s.0;
+    let y = s.1;
+    s.0 = y.wrapping_add(1);
+    s.1 = x.wrapping_add(2);
+}