• bmeurer's avatar
    [turbofan] Introduce a dedicated StringCharAt operator. · 05f5ebce
    bmeurer authored
    Previously String element access and String.prototype.charAt were
    lowered to a subgraph StringFromCharCode(StringCharCodeAt(s, k)),
    however that can be fairly expensive both runtime and compile time
    wise. The dedicated StringCharAt operator is implemented via a call
    to a builtin that does exactly this.
    
    R=yangguo@chromium.org
    
    Review-Url: https://codereview.chromium.org/2599683002
    Cr-Commit-Position: refs/heads/master@{#41909}
    05f5ebce
code-stub-assembler.h 52.1 KB