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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://f.duriansoftware.com/users/joe/statuses/113159010531092225">Joe Groff (joe@f.duriansoftware.com)'s status on Thursday, 19-Sep-2024 06:08:16 JST</a><a href="https://f.duriansoftware.com/@joe" title="joe@f.duriansoftware.com"><img src="https://gnusocial.jp/avatar/282871-48-20240918210816.webp" width="48" height="48" alt="Joe Groff" style="position: absolute; left: 0; top: 0;">Joe Groff</a></section><article><p>a while back, someone asked, "why isn't there a way in C to tell if my code is optimized?" thankfully, we can implement this as a library function</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3691011#notice-7230433">In conversation</a><time datetime="2024-09-19T06:08:16+09:00" title="Thursday, 19-Sep-2024 06:08:16 JST">about 5 months ago</time> <span>from <span><a href="https://f.duriansoftware.com/@joe/113159010531092225" rel="external" title="Sent from f.duriansoftware.com via ActivityPub">f.duriansoftware.com</a></span></span><a href="https://f.duriansoftware.com/@joe/113159010531092225">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/3189650">#include &lt;stdio.h&gt;__attribute__((noinline))
bool is_optimized_impl(int *a, float *b) {
    *a = 0;
    *b = 1;
    return *a == 0;
}bool is_optimized() {
    union {
        int a;
        float b;
    } u;
    return is_optimized_impl(&amp;u.a, &amp;u.b);
}int main() {
  printf("i am %soptimized\n", is_optimized() ? "" : "not ");
}</a></label><br><a href="https://cdn.masto.host/fduriansoftwarecom/media_attachments/files/113/159/008/547/046/237/original/d7fe671f929a950c.png" rel="external">https://cdn.masto.host/fduriansoftwarecom/media_attachments/files/113/159/008/547/046/237/original/d7fe671f929a950c.png</a></li></ol></footer></blockquote>

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Joe Groff (joe@f.duriansoftware.com)'s status on Thursday, 19-Sep-2024 06:08:16 JST Joe Groff
a while back, someone asked, "why isn't there a way in C to tell if my code is optimized?" thankfully, we can implement this as a library function
In conversationabout 5 months ago from f.duriansoftware.compermalink
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1. #include <stdio.h> __attribute__((noinline)) bool is_optimized_impl(int *a, float *b) { *a = 0; *b = 1; return *a == 0; } bool is_optimized() { union { int a; float b; } u; return is_optimized_impl(&u.a, &u.b); } int main() { printf("i am %soptimized\n", is_optimized() ? "" : "not "); }
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