• mbrandy's avatar
    PPC: [compiler] Introduce StringEqualStub and StringNotEqualStub. · d61b8cee
    mbrandy authored
    Port 2689548e
    
    Original commit message:
        These new stubs perform exactly the same job as the string equality case
        for the CompareIC, but are platform independent and usable outside of
        fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
        StrictNotEqualStub instead of falling back to the runtime immediately
        for String comparisons, and we also use them in TurboFan to perform
        String equality or inequality comparisons.
    
        These stubs currently handle only internalized and one byte strings w/o
        going to C++, but it should be easy to add support for more string cases
        later, i.e. utilizing already flattened cons strings or comparing two
        byte strings as well.
    
    R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    
    Review URL: https://codereview.chromium.org/1763723002
    
    Cr-Commit-Position: refs/heads/master@{#34462}
    d61b8cee
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