Aldy Hernandez's contributions
Article
How we expanded GCC value range propagation to floats
The GCC compiler is expanding range tracking in optimizations.
Article
Improve your code: Tales from confinement without a debugger
Discover how to improve your code rather than over-relying on debuggers through lessons learned by a developer that didn't use a debugger for a month.
Article
A gentle introduction to jump threading optimizations
This article describes GCC compiler optimizations for jump threading. Jump threading's major goal is to reduce the number of dynamically executed jumps on different paths through the program's control flow graph, which often results in improved performance due to the reduction of conditionals and, in turn, enables further optimizations.
Article
Diagnosing Function Pointer Security Flaws with a GCC plugin
A few months ago, I had to write some internal GCC passes to perform static analysis on the GNU C Library (glibc). I figured I might as well write them as plugins since they were unlikely to see the light of day outside of my little sandbox. Being a long time GCC contributor, but having no experience writing plugins I thought it'd be a good way to eat our own dog food, and perhaps write about my experience. Unfortunately, I...
Article
Bootstrapping POWER8 little endian and common pitfalls
Earlier this year I was asked to bootstrap our core tools (compiler, assembler, linker, and libraries) from the ground up, to help the rest of the team in providing enough infrastructure for bootstrapping an entire OS to POWER8 little endian. Since I spend most of my days working on the upstream development of the GNU Compiler Collection (GCC), prior to this project I hadn't actually worked much with either RHEL's development processes or RPM as a whole. So leading our...
Article
How we expanded GCC value range propagation to floats
The GCC compiler is expanding range tracking in optimizations.
Article
Improve your code: Tales from confinement without a debugger
Discover how to improve your code rather than over-relying on debuggers through lessons learned by a developer that didn't use a debugger for a month.
Article
A gentle introduction to jump threading optimizations
This article describes GCC compiler optimizations for jump threading. Jump threading's major goal is to reduce the number of dynamically executed jumps on different paths through the program's control flow graph, which often results in improved performance due to the reduction of conditionals and, in turn, enables further optimizations.
Article
Diagnosing Function Pointer Security Flaws with a GCC plugin
A few months ago, I had to write some internal GCC passes to perform static analysis on the GNU C Library (glibc). I figured I might as well write them as plugins since they were unlikely to see the light of day outside of my little sandbox. Being a long time GCC contributor, but having no experience writing plugins I thought it'd be a good way to eat our own dog food, and perhaps write about my experience. Unfortunately, I...
Article
Bootstrapping POWER8 little endian and common pitfalls
Earlier this year I was asked to bootstrap our core tools (compiler, assembler, linker, and libraries) from the ground up, to help the rest of the team in providing enough infrastructure for bootstrapping an entire OS to POWER8 little endian. Since I spend most of my days working on the upstream development of the GNU Compiler Collection (GCC), prior to this project I hadn't actually worked much with either RHEL's development processes or RPM as a whole. So leading our...
