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Answer by Peter Cordes for C/С++. Why could a simple integer addition on a...
This is all because you used volatile and GCC doesn't optimize it as aggressively Without volatile, e.g. for a single ++*int_ptr, you get a memory-destination add. (And hopefully not inc when tuning...
View ArticleC/С++. Why could a simple integer addition on a volatile be translated to a...
I wrote a simple loop: int volatile value = 0; void loop(int limit) { for (int i = 0; i < limit; ++i) { ++value; } } I compiled this with gcc and clang(-O3 -fno-unroll-loops) and got different...
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