Better name for inout / out argument placeholder variables

Signed-off-by: Anton Korobeynikov <[email protected]>

Author: asl

test/Translate/Ops/calls.p4

@@ -36,13 +36,13 @@ action bazz(in int<16> arg1) {
     // CHECK: p4hir.call @bar() : () -> ()
     bar();
     // CHECK: p4hir.scope
-    // CHECK: %[[VAR_A:.*]] = p4hir.variable ["a_out"] : <!i16i>
+    // CHECK: %[[VAR_A:.*]] = p4hir.variable ["a_out_arg"] : <!i16i>
     // CHECK: p4hir.call @quuz(%[[VAR_A]]) : (!p4hir.ref<!i16i>) -> ()
     // CHECK: p4hir.read %[[VAR_A]] : <!i16i>
     int<16> val;
     quuz(val);
     // CHECK: p4hir.scope
-    // CHECK: %[[VAR_X:.*]] = p4hir.variable ["x_inout", init] : <!i16i>
+    // CHECK: %[[VAR_X:.*]] = p4hir.variable ["x_inout_arg", init] : <!i16i>
     // CHECK: %[[VAL_X:.*]] = p4hir.read %[[VAL:.*]] : <!i16i>
     // CHECK: p4hir.assign %[[VAL_X]], %[[VAR_X]] : <!i16i>
     // CHECK: p4hir.call @baz(%[[VAR_X]])

test/Translate/Ops/function.p4

@@ -44,11 +44,11 @@ action test_param() {
 // CHECK-LABEL: p4hir.func action @test_param() {
 // CHECK:    %[[A:.*]] = p4hir.variable ["a"] : <!b1i>
 // CHECK:    p4hir.scope {
-// CHECK:      %[[X_INOUT:.*]] = p4hir.variable ["x_inout", init] : <!b1i>
+// CHECK:      %[[X_INOUT:.*]] = p4hir.variable ["x_inout_arg", init] : <!b1i>
 // CHECK:      %[[A_VAL:.*]] = p4hir.read %[[A]] : <!b1i>
 // CHECK:      p4hir.assign %[[A_VAL]], %[[X_INOUT]] : <!b1i>
 // CHECK:      %[[G_VAL:.*]] = p4hir.scope {
-// CHECK:        %[[Z_INOUT:.*]] = p4hir.variable ["z_inout", init] : <!b1i>
+// CHECK:        %[[Z_INOUT:.*]] = p4hir.variable ["z_inout_arg", init] : <!b1i>
 // CHECK:        %[[A_VAL2:.*]] = p4hir.read %[[A]] : <!b1i>
 // CHECK:        p4hir.assign %[[A_VAL2]], %[[Z_INOUT]] : <!b1i>
 // CHECK:        %[[G_RES:.*]] = p4hir.call @g(%[[Z_INOUT]]) : (!p4hir.ref<!b1i>) -> !b1i

tools/p4mlir-translate/translate.cpp

@@ -916,8 +916,9 @@ bool P4HIRConverter::preorder(const P4::IR::MethodCallExpression *mce) {
                     auto copyIn = b.create<P4HIR::VariableOp>(
                         loc, ref,
                         mlir::StringAttr::get(
-                            context(), llvm::Twine(params[idx]->name.string_view()) +
-                                           (dir == P4::IR::Direction::InOut ? "_inout" : "_out")));
+                            context(),
+                            llvm::Twine(params[idx]->name.string_view()) +
+                                (dir == P4::IR::Direction::InOut ? "_inout_arg" : "_out_arg")));
 
                     if (dir == P4::IR::Direction::InOut) {
                         copyIn.setInit(true);