https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116718
Bug ID: 116718
Summary: bpf: support bpf_fastcall attributes
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jemarch at gcc dot gnu.org
Target Milestone: ---
Target: bpf
BPF is introducing a way to perform load-time optimizations by inlining
function calls to instruction sequences. Calls to functions marked with the
bpf_fastcall attributes should not clobber caller-preserved registers so they
not alter register pressure in their containing units. Instead, the compiler
shall generate certain fixed patterns to save and restore argument and result
registers, which are then recognized by the BPF verifier and patched.
Corresponding clang/llvm PR: https://github.com/llvm/llvm-project/pull/101228
