• Milad Fa's avatar
    PPC/s390: [compiler] Remove delayed string constants · 08607d37
    Milad Fa authored
    Port de04959f
    
    Original Commit Message:
    
        StringConstantXXX were introduced when we switched to concurrent
        compilation, as a way to build strings in Turbofan in a background
        thread, without having to actually allocate them on the main heap
        from the background. See https://crrev.com/c/1221807.
    
        Now that we have local heaps, we can actually allocate strings from
        the background, making StringConstantXXX useless.
    
        Moreover, we would fold constant string concatenations into
        ConsString, which sounds a bit dubious for performance. Now, small
        constant string concatenations will be folded into SeqStrings, while
        larger ones will remain ConsString, just to avoid the quadratic
        worst-case.
    
    R=dmercadier@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
    BUG=
    LOG=N
    
    Change-Id: I0fb010dfda4a94ba8c5d09de96fa1932c6c91113
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3826049Reviewed-by: 's avatarDarius Mercadier <dmercadier@chromium.org>
    Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
    Cr-Commit-Position: refs/heads/main@{#82416}
    08607d37
code-generator-s390.cc 154 KB