On Sunday, 9 June 2019 at 05:24:56 UTC, Amex wrote:
Can dmd or ldc optimize the following cases:

foo(int x)
   if (x > 10 && x < 100) bar1; else bar2;


for(int i = 23; i < 55; i++)
   foo(i); // equivalent to calling bar1(i)

clearly i is within the range of the if in foo and so the checks are unnecessary.

This is a simple case of inlining for the optimizer, so works out well with LDC and GDC:


  • Can D optimize? Amex via Digitalmars-d-learn
    • Re: Can D optimize? Johan Engelen via Digitalmars-d-learn

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