• littledan's avatar
    Add a separate scope for switch · 45e2628d
    littledan authored
    The ES2015 specification for switch statements 13.12.11 specifies that
    they get their own lexical scope. This patch introduces such a scope
    through a complex desugaring in terms of blocks, done so that Crankshaft
    does not have to be updated to support multiple constructs providing
    scopes.
    
    Recommitting this patch after a bug fix in Crankshaft to allow a
    desugaring with certain elements missing a source location:
    https://codereview.chromium.org/1313443002
    
    BUG=v8:4377
    LOG=Y
    R=adamk
    
    Review URL: https://codereview.chromium.org/1309163003
    
    Cr-Commit-Position: refs/heads/master@{#30340}
    45e2628d