backend: introduce be_desc_t contract and static registration - #155
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Every existing backend now sits behind a be_desc_t (is_on, isel, sched, regalloc, verify, emit, mfree) registered in a static be_list; the driver iterates once instead of the copy-pasted if-chain in main.c. Skeleton at src/backend/skeleton/ is the starting point for a new target. docs/backends.md is the walkthrough. Tests 352/12/1 (+4 be_ tests, no regressions).
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Every existing backend now sits behind a
be_desc_t(is_on, isel, sched, regalloc, verify, emit, mfree) registered in a staticbe_list; the driver iterates once instead of the copy-pasted if-chain inmain.c.Skeleton at
src/backend/skeleton/is the starting point for a new target.docs/backends.mdis the walkthrough.Tests 352/12/1 (+4 be_ tests, no regressions).