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  2. Clang - Wikipedia

    en.wikipedia.org/wiki/Clang

    In practice, Clang is a drop-in replacement for GCC. [24] Clang's developers aim to reduce memory footprint and increase compiling speed compared to other compilers, such as GCC. In October 2007, they report that Clang compiled the Carbon libraries more than twice as fast as GCC, while using about one-sixth GCC's memory and disk space. [25]

  3. AMD Optimizing C/C++ Compiler - Wikipedia

    en.wikipedia.org/wiki/AMD_Optimizing_C/C++_Compiler

    The AMD Optimizing C/C++ Compiler (AOCC) is an optimizing C/C++ and Fortran compiler suite from AMD targeting 32-bit and 64-bit Linux platforms. [1] [2] It is a proprietary fork of LLVM + Clang with various additional patches to improve performance for AMD's Zen microarchitecture in Epyc, and Ryzen microprocessors.

  4. Optimizing compiler - Wikipedia

    en.wikipedia.org/wiki/Optimizing_compiler

    Whether particular optimizations can and should be applied may depend on the characteristics of the target machine. Some compilers such as GCC and Clang parameterize machine-dependent factors so that they can be used to optimize for different machines. [6] Target CPU architecture. Number of registers: Registers can be used to optimize for ...

  5. Interprocedural optimization - Wikipedia

    en.wikipedia.org/wiki/Interprocedural_optimization

    Due to performance concerns, not even the entire unit is always directly used—a program could be partitioned in a divide-and-conquer style LTO such as GCC's WHOPR. [2] And of course, when the program being built is itself a library, the optimization would keep every externally-available (exported) symbol, without trying too hard at removing ...

  6. Profile-guided optimization - Wikipedia

    en.wikipedia.org/wiki/Profile-guided_optimization

    In computer programming, profile-guided optimization (PGO, sometimes pronounced as pogo [1]), also known as profile-directed feedback (PDF) [2] or feedback-directed optimization (FDO), [3] is the compiler optimization technique of using prior analyses of software artifacts or behaviors ("profiling") to improve the expected runtime performance of the program.

  7. LLVM - Wikipedia

    en.wikipedia.org/wiki/LLVM

    Apple was a significant user of LLVM-GCC through Xcode 4.x (2013). [43] [44] This use of the GCC frontend was considered mostly a temporary measure, but with the advent of Clang and advantages of LLVM and Clang's modern and modular codebase (as well as compilation speed), is mostly obsolete.

  8. Instruction scheduling - Wikipedia

    en.wikipedia.org/wiki/Instruction_scheduling

    In computer science, instruction scheduling is a compiler optimization used to improve instruction-level parallelism, which improves performance on machines with instruction pipelines. Put more simply, it tries to do the following without changing the meaning of the code: Avoid pipeline stalls by rearranging the order of instructions. [1]

  9. x86 calling conventions - Wikipedia

    en.wikipedia.org/wiki/X86_calling_conventions

    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.