Memory aliasing and vectorization
Why the compiler assumes your pointers overlap, and what restrict actually promises.
[ Research ]
Compilers
Auto-vectorization, optimization reports, pragmas, aliasing and code generation.
Loop-carried dependencies explained
Dependency distance, recurrences, reductions and which patterns a compiler can still vectorize.
Why compilers fail to vectorize loops
Dependencies, aliasing, alignment, control flow and profitability. The reasons automatic vectorization breaks down, and what each one looks like in source code.
Why Compilers Fail to Vectorize Loops
Compilers skip vectorization when legality, profitability or target constraints get in the way. Learn the most common blockers: dependencies, aliasing, control flow, calls and memory access.