PDP-11: expensive (in terms of backend binary size) optimizations: - #189
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shattered wants to merge 1 commit into
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PDP-11: expensive (in terms of backend binary size) optimizations:#189shattered wants to merge 1 commit into
shattered wants to merge 1 commit into
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- use register cache whenever possible - use indirect addressing modes in ALU and compare insns - use TST and CMP in place of ADD, when possible - use byte swap and rotate insns to speed up shifts - etc. r16n0/r32n0 workarounds are still necessary to avoid deadlocks in register allocator.
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r16n0/r32n0 workarounds are still necessary to avoid deadlocks in register allocator.
There's also a workaround for cowasm bug -- "-1(Rn)" is a syntax error.