[lworld] RFR: 8372824: [lworld] C2 hits "Unexpected argument type" assertion with --enable-preview

[Quan Anh Mai]

Since I overrode `MyValue1::equals` in #1929 , `TestIntrinsics` has failed with `-XX:PerMethodSpecTrapLimit=0 -XX:PerMethodTrapLimit=0`. The failed test is this one:

    // Value class array creation via reflection
    @Test
    public void test51(int len) {
        Object[] va = (Object[])Array.newInstance(MyValue1.class, len);
        for (int i = 0; i < len; ++i) {
            Asserts.assertEQ(va[i], null);
        }
    }

During parsing, `Array::newInstance` is not inlined, so `va` is of type `Object[]` and `va[i]` is of type `Object`. `Asserts.assertEQ` calls `va[i].equals(null)` which resolves to a `CallJavaDynamic` with its receiver of type `Object`, which is passed in as an oop. During incremental inline, It is revealed that `va` is a `MyValue1[]` and `va[i]` is of type `MyValue1`. This allows the devirtualization of `va[i]::equals`. Since this is a method call on a value object, the calling convention changes, which leads to the assert because the input is an oop.

I relaxed the assert a little bit to allow changing of the calling convention due to devirtualization.

Please take a look and leave your review, thansk a lot.

-------------

Commit messages:
 - Fix assert due to devirtualized methods

Changes: https://git.openjdk.org/valhalla/pull/1935/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1935&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372824
  Stats: 13 lines in 1 file changed: 10 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1935.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1935/head:pull/1935

PR: https://git.openjdk.org/valhalla/pull/1935