[GROOVY-10034] Compiler writes extra cast for Type[] to Object[]

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0-beta-1
• Component/s: bytecode
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 12/Apr/21 14:02
• Updated: 03/Feb/22 22:34
• Resolved: 14/Apr/21 04:06

Description

Consider the following:

['x'].toArray(new String[0])

This produces a bytecode sequence that includes a cast from String[] to Object[]. javac for the same code omits the cast.

     9  iconst_0
    10  multianewarray java.lang.String[] [44]
    14  invokedynamic 0 cast(java.lang.String[]) : java.lang.Object[] [58]
    19  invokeinterface java.util.Collection.toArray(java.lang.Object[]) : java.lang.Object[] [64] [nargs: 2]

Note: multianewarray vs anewarray was fixed by GROOVY-10031

Issue Links

• is cloned by: GROOVY-10035 Eliminate redundant type cast