[mlir][arith] Add constraints to the MulIOp for preventing type mismatch while folding (llvm#136093)

Fixes llvm#135289
The original version didn't check if the types of lhs, rhs, and the
result matched, which could cause type errors.
This fix adds type checks to make sure the constants attributes have
the same type as the SSA values before applying the simplification.

Author: Prakhar-Dixit

mlir/lib/Dialect/Arith/IR/ArithCanonicalization.td

@@ -90,7 +90,9 @@ def MulIMulIConstant :
           (Arith_MulIOp $x, (ConstantLikeMatcher APIntAttr:$c0), $ovf1),
           (ConstantLikeMatcher APIntAttr:$c1), $ovf2),
         (Arith_MulIOp $x, (Arith_ConstantOp (MulIntAttrs $res, $c0, $c1)),
-            (MergeOverflow $ovf1, $ovf2))>;
+            (MergeOverflow $ovf1, $ovf2)),
+             [(Constraint<CPred<"$0.getType() == cast<IntegerAttr>($1).getType()">> $res, $c0),
+              (Constraint<CPred<"$0.getType() == cast<IntegerAttr>($1).getType()">> $res, $c1)]>;
 
 //===----------------------------------------------------------------------===//
 // AddUIExtendedOp

mlir/test/Dialect/Arith/canonicalize.mlir

@@ -1234,6 +1234,24 @@ func.func @doubleAddSub2(%arg0: index, %arg1 : index) -> index {
   return %add : index
 }
 
+// Negative test case to ensure no further folding is performed when there's a type mismatch between the values and the result.
+// CHECK-LABEL:   func.func @nested_muli() -> i32 {
+// CHECK:           %[[VAL_0:.*]] = "test.constant"() <{value = 2147483647 : i64}> : () -> i32
+// CHECK:           %[[VAL_1:.*]] = "test.constant"() <{value = -2147483648 : i64}> : () -> i32
+// CHECK:           %[[VAL_2:.*]] = "test.constant"() <{value = 2147483648 : i64}> : () -> i32
+// CHECK:           %[[VAL_3:.*]] = arith.muli %[[VAL_0]], %[[VAL_1]] : i32
+// CHECK:           %[[VAL_4:.*]] = arith.muli %[[VAL_3]], %[[VAL_2]] : i32
+// CHECK:           return %[[VAL_4]] : i32
+// CHECK:         }
+func.func @nested_muli() -> (i32) {
+  %0 = "test.constant"() {value = 0x7fffffff} : () -> i32
+  %1 = "test.constant"() {value = -2147483648} : () -> i32
+  %2 = "test.constant"() {value = 0x80000000} : () -> i32
+  %4 = arith.muli %0, %1 : i32
+  %5 = arith.muli %4, %2 : i32
+  return %5 : i32
+}
+
 // CHECK-LABEL: @tripleMulIMulIIndex
 //       CHECK:   %[[cres:.+]] = arith.constant 15 : index
 //       CHECK:   %[[muli:.+]] = arith.muli %arg0, %[[cres]] : index