Search results
Results from the WOW.Com Content Network
Most advanced compilers have options to activate dead-code elimination, sometimes at varying levels. A lower level might only remove instructions that cannot be executed. A higher level might also not reserve space for unused variables. A yet higher level might determine instructions or functions that serve no purpose and eliminate them.
Remove the unused allocation and free. All of these steps are individually possible. Even step four is possible despite the fact that functions like malloc and free have global side effects, since some compilers hardcode symbols such as malloc and free so that they can remove unused allocations from the code. [6]
Unreachable code that a programmer decided not to delete because it is mingled with reachable code; Potentially reachable code that current use cases never need; Dormant code that is kept intentionally in case it is needed later; Code used only for debugging. Legacy code is that which was once useful but is no longer used or required.
A diagram depicting an optimizing compiler removing a potentially useless call to assembly instruction "b" by sinking it to its point of use. Code Sinking, also known as lazy code motion, is a term for a technique that reduces wasted instructions by moving instructions to branches in which they are used: [1] If an operation is executed before a branch, and only one of the branch paths use the ...
gcc and clang offer the -mno-red-zone flag to disable red-zone optimizations. If the callee is a variadic function , then the number of floating point arguments passed to the function in vector registers must be provided by the caller in the AL register.
Of the many apps you likely have on your iPhone or iPad right now, how many do you actually use regularly? Chances are that you have at least a few that you're keeping merely because they have ...
President Donald Trump fired the head of a U.S. watchdog agency focused on protecting government whistleblowers, the official said on Monday in a lawsuit alleging that his removal was unlawful.
Loop peeling was introduced in gcc in version 3.4. More generalised loop splitting was added in GCC 7. [1] Brief history of the term