Fixed long / double / float value merge in OptimizationBasicInterpreter #KT-7401 Fixed

compiler/testData/codegen/box/regressions/doubleMerge.kt

@@ -0,0 +1,10 @@
+fun foo(): Double {
+    var d = 2.0
+    if (d > 0.0) {
+        d++
+    }
+    d++
+    return d
+}
+
+fun box() = if (foo() > 3.5) "OK" else "Fail"

compiler/testData/codegen/box/regressions/floatMerge.kt

@@ -0,0 +1,10 @@
+fun foo(): Float {
+    var f = 2.0f
+    if (f > 0.0f) {
+        f++
+    }
+    f++
+    return f
+}
+
+fun box() = if (foo() > 3.5f) "OK" else "Fail"

compiler/testData/codegen/box/regressions/kt7401.kt

@@ -0,0 +1,10 @@
+fun foo(): Long {
+    var n = 2L
+    if (n > 0L) {
+        n++
+    }
+    n++
+    return n
+}
+
+fun box() = if (foo() == 4L) "OK" else "Fail"