GitHub

LLVM Tutorial for Security Practitioners

This tutorial intends to teach the audience several core concepts of LLVM, using an example pass that creates and inserts a function call to a library function into the target program. Note: The ...
IEEE

LLVM and the Automatic Vectorization of Loops Invoking Math Routines: -FSIMDMATH

Abstract: The vectorization of loops invoking math function is an important optimization that is available in most commercial compilers. This paper describes a new command line option, -fsimdmath, ...
GitHub

[LoopVectorize][AArch64] - Missed Loop Vectorization for Neon target due to high cost of scalarization of sdiv, for mcpu=oryon-1.

For the following IR test case, Loop vectorizer blocks vectorization of this loop due to high cost of scalar sdiv operation. Manually enabling vectorization using #pragma improves performance ...
LinkedIn

Adding a custom x86 instruction to LLVM: a tutorial

Ever seen LLVM spit out “Type set is empty for each HW mode”? I hit that (and a dozen other errors) trying to add a toy x86 instruction to LLVM. In this post, I walk through the journey: defining a ...
IEEE

An Improved Method for Control Dependency in LLVM

Abstract: The existence of control dependencies within programs necessitates intricate data reorganization, significantly hindering the vectorization capabilities in automated SIMD compilation ...