Support Visit Enum Inst

[mmroz]

[mmroz]

Given the Swift code:

enum Scalar {
case emptyInput
}

var result : Scalar = .emptyInput

We get the WALA block:

FOO: 274579533:BLOCK
LABEL_STMT
"BLOCK #6"
OBJECT_LITERAL
"DISCRIMINATOR"
"emptyInput"
ASSIGN
(null)
(null)
GOTO
"BLOCK #7"

[karimhamdanali]

Shall we close this now?