Ignore sources which are not LOADs in refinedIntTypeAnalysis

#KT-33414 Fixed

compiler/testData/codegen/box/coroutines/varSpilling/refinedIntTypesAnalysis.kt

@@ -0,0 +1,34 @@
+// IGNORE_BACKEND: JVM_IR
+// WITH_RUNTIME
+// FULL_JDK
+
+import java.nio.ByteBuffer
+
+class Test {
+    suspend fun discardSuspend(discarded0: Long, max: Long) {
+        while (isClosedForRead) {
+            // this assignment is required
+            val rc = reading {
+                true
+            }
+
+            if (!readSuspend(1)) break
+        }
+    }
+
+
+    private inline fun reading(block: () -> Boolean): Boolean {
+        setupStateForRead() ?: return false
+        try {
+            return block()
+        } finally {
+        }
+    }
+
+    val isClosedForRead = false
+
+    private suspend fun readSuspend(size: Int): Boolean = true
+    private fun setupStateForRead(): Any? = null
+}
+
+fun box() = "OK"