Blog

Thoughts on programming, technology, and things I find interesting.

An instruction-level comparison of SPEC2006 and SPEC2026 binaries built with the same GCC 13 toolchain, and of SPEC2006 built with GCC 9 versus GCC 13.

x86 compilers binary translation SPEC benchmarks

2026-03-30

When ELF Section Symbols Have Names: A Subtle Relocation Bug in Multi-Batch LLVM Compilation

A constant pool load silently fetched wrong data in multi-batch compilation — traced to a 2019 LLVM API change that made section symbol names non-empty.

LLVM ELF AArch64 debugging

2026-03-28

MachineSink's SinkAndFold and the Duplicate Use Bug

LLVM AArch64 debugging compiler backends

Blog

Comparing SPEC CPU2006 and SPEC CPU2026 at the Instruction Level

When ELF Section Symbols Have Names: A Subtle Relocation Bug in Multi-Batch LLVM Compilation

MachineSink's SinkAndFold and the Duplicate Use Bug