Prefer caller-save registers and emit callee-save clobber comments#437
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dop-amin wants to merge 1 commit into
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Prefer caller-save registers and emit callee-save clobber comments#437dop-amin wants to merge 1 commit into
dop-amin wants to merge 1 commit into
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* Add `callee_saved_registers()` to Arm v8.1-M/Helium and RISC-V ISA models * Add `config.constraints.prefer_caller_save_registers`: biases allocation toward input registers and away from callee-saved ones via CP-SAT hints and a secondary minimisation objective (never sacrifices stall counts) * Add `config.emit_clobbered_callee_saves_comment` (default True): prepends a comment listing clobbered callee-saved registers to the output * Accumulate clobber set across preamble, kernel, and postamble in `Heuristics.periodic`; store on `Result` * Add four AArch64 naive tests covering the new features including a forced callee-save allocation case and a SW-pipelining path
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callee_saved_registers()to Arm v8.1-M/Helium and RISC-V ISA modelsconfig.constraints.prefer_caller_save_registers: biases allocation toward input registers and away from callee-saved ones via CP-SAT hints and a secondary minimisation objective (never sacrifices stall counts)config.emit_clobbered_callee_saves_comment(default True): prepends a comment listing clobbered callee-saved registers to the outputHeuristics.periodic; store onResult