MONDAY, AUGUST 3, 2026
match Performance Win
Match: Reduce genmatch output by combining simplify for.
Genmatch C++ output reduced by simplifying loops.
The genmatch tool’s output has been reduced by consolidating four separate ‘simplify for’ loops into a single one. This change decreases the amount of generated C++ code, potentially leading to faster compilation times for code that uses this feature. The change was bootstrapped and regression tested.
In Details
The match.pd file, which likely defines patterns for the genmatch utility, has been modified to combine four distinct simplify for constructs into a single loop. This reduces code bloat in the generated C++ code, making it more concise.
For Context
- genmatch
- A tool within GCC that generates C++ code based on pattern matching definitions. This generated code is often used for compiler optimizations or code generation.
- simplify for
- A construct or operation within the
genmatchsystem that simplifies a loop or iterative process. The commit combines multiple such simplifications into a single loop construct.