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WIP: Make mutating immutables easier #21912

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wants to merge 7 commits into from
Closed

WIP: Make mutating immutables easier #21912

wants to merge 7 commits into from

Commits on May 21, 2017

  1. Add runtime support for non-mutating setindex

    @Keno
    Keno committed May 21, 2017
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  2. Add basic parsing and lowering support

    @Keno
    Keno committed May 21, 2017
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  3. Codegen and inference

    @Keno
    Keno committed May 21, 2017
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  4. Unoptimized implementation of new semantics

    @Keno
    Keno committed May 21, 2017
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Commits on May 23, 2017

  1. WIP

    @Keno
    Keno committed May 23, 2017
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  2. Add extra early memcpyopt pass 

    Under certain circumstances, we emit loads/stores of large LLVM
structs. A lot of these can be trivially folded to memcpy and memcpyopt
is capable of doing so, but we weren't running it until after SROA.
SROA unfortunately, likes to take these apart, causing exponential
compile-time blow up and reduced runtime peroformance. In one particular
case (2000 element tuple), this change results in a 100x improvement
in compile time.
    @Keno
    Keno committed May 23, 2017
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Commits on May 25, 2017

  1. Some tweaks based on experiments

    @Keno
    Keno committed May 25, 2017
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