PERFORMANCE Signal 75
AMD's GCC patch optimizes narrow-type loads before arithmetic on x86_64
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AMD has posted a new GCC patch that implements a general x86_64 optimization for loads involving narrow types followed by arithmetic, not limited to Zen processors.
This optimization could improve code generation for common patterns where a narrow load is widened before arithmetic, potentially reducing instruction count or improving scheduling. Being a general x86_64 optimization, it benefits all AMD and Intel processors, not just Zen. Engineers compiling with GCC may see performance improvements in such code after the patch lands.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
AMD posted a new GCC patch for x86_64.
The optimization is general and not tied to Zen processors.
It targets code with a narrower type followed by an arithmetic type.
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