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c++ Programming Glossary: reorderdoes presence of mutex help getting rid of volatile key word ? http://stackoverflow.com/questions/1616093/does-presence-of-mutex-help-getting-rid-of-volatile-key-word the variable from memory not from a register. And to not reorder the code around. In general not to optimize or take 'short cuts'... Sutter in another answer are for preventing the CPU from reordering read write memory requests regardless of how the compiler.. that your compiler will recognize and thus avoid reordering. EDIT P.S. I forgot to mention for pthreads stuff some compilers..
modular arithmetics and NTT (finite field DFT) optimizations http://stackoverflow.com/questions/18577076/modular-arithmetics-and-ntt-finite-field-dft-optimizations 1 dst 0 src 0 return DWORD i j a0 a1 n2 n 1 w2 modmul w w reorder even odd for i 0 j 0 i n2 i j 2 dst i src j for j 1 i n i j..
C++ using this pointer in constructors http://stackoverflow.com/questions/2516960/c-using-this-pointer-in-constructors want to play with your code around and decide that it will reorder instructions and it might actually pass the this pointer before..
“volatile” qualifier and compiler reorderings http://stackoverflow.com/questions/2535148/volatile-qualifier-and-compiler-reorderings volatile&rdquo qualifier and compiler reorderings A compiler cannot eliminate or reorder reads writes to.. and compiler reorderings A compiler cannot eliminate or reorder reads writes to a volatile qualified variables. But what about.. int a volatile int b a 1 b 2 a 3 b 4 Can the compiler reorder first and the second or third and the fourth assignments Scenario..
How does switch compile and how optimized and fast is it? http://stackoverflow.com/questions/2596320/how-does-switch-compile-and-how-optimized-and-fast-is-it to run or if that is not possible the compiler may still reorder the comparisons so as to perform a binary search among the values..
How can I compare the performance of log() and fp division in C++? http://stackoverflow.com/questions/2858483/how-can-i-compare-the-performance-of-log-and-fp-division-in-c uses a single instruction dispatch slot the hardware's reorder engine can do other useful computation while the divide is in..
Is 'volatile' needed in this multi-threaded C++ code? http://stackoverflow.com/questions/3612505/is-volatile-needed-in-this-multi-threaded-c-code be wrong. And I'm also worried about if the compiler may reorder instructions such as to break thread safety. But better be safe..
“dereferencing type-punned pointer will break strict-aliasing rules” warning http://stackoverflow.com/questions/4163126/dereferencing-type-punned-pointer-will-break-strict-aliasing-rules-warning one then read from the other GCC may as an optimisation reorder the read and write I have seen this happen in production code..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three One possible solution is to introduce a local variable and reorder the statements 2. copy assignment operator person operator const..
Atomicity in C++ : Myth or Reality http://stackoverflow.com/questions/5002046/atomicity-in-c-myth-or-reality programming . You should also check that compiler don't reorder your code. You can use compiler memory barrier for that. Low..
When does postincrement i++ get executed? [duplicate] http://stackoverflow.com/questions/5433852/when-does-postincrement-i-get-executed b 4 int c __tmp1 __tmp2 5 But the compiler is allowed to reorder the 5 instructions as long as the following constraints are..
What does `std::kill_dependency` do, and why would I want to use it? http://stackoverflow.com/questions/7150395/what-does-stdkill-dependency-do-and-why-would-i-want-to-use-it line. According to N2664 This allows the compiler to reorder the call to do_something_with for example by performing speculative.. zeros it can optimize that call to do_something_with 0 and reorder this call relative to the other two instructions as it pleases...
Reorder vector using a vector of indices http://stackoverflow.com/questions/838384/reorder-vector-using-a-vector-of-indices vector using a vector of indices I'd like to reorder the items in a vector using another vector to specify the order.. vector size_t vOrder ORDER ORDER sizeof ORDER sizeof ORDER reorder_naive vA vOrder A is now 'b' 'a' 'c' The following is an inefficient.. implementation that requires copying the vector void reorder_naive vector char & vA const vector size_t & vOrder assert vA.size..
Can a C++ compiler re-order elements in a struct http://stackoverflow.com/questions/916600/can-a-c-compiler-re-order-elements-in-a-struct element share improve this question It normally can't reorder elements no. An exception is if there's an access specifier.. can insert as much padding as it likes even if it doesn't reorder anything. Here's the relevant part of the standard Section 9.2.12..
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