[mono][interp] Lower div.un to shr.un.imm#83498
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Generate sub opcode instead which is detected by other optimizations.
BrzVlad
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kotlarmilos,
lewing,
pavelsavara and
vargaz
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Tagging subscribers to this area: @BrzVlad, @kotlarmilos Issue DetailsIf divisor is power of 2.
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kg
reviewed
Mar 16, 2023
| #endif | ||
| td->sp -= 2; | ||
| interp_ins_set_sregs2 (td->last_ins, td->sp [1].local, td->sp [0].local); | ||
| push_simple_type (td, STACK_TYPE_I); |
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The original interp opcode looks like it was storing the result of a signed pointer subtraction into an unsigned int (mono_u), but I assume this will behave correctly as-is?
kg
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Mar 16, 2023
kotlarmilos
reviewed
Mar 16, 2023
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| interp_clear_ins (def); | ||
| interp_clear_ins (ins); | ||
| local_ref_count [sreg_imm]--; |
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Probably mono_interp_stats.super_instructions++; is missing
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Some of these stats are not that useful anymore, I will probably get rid of them in the future. Also this is more of a peephole optimization. This pass will probably end up being rebranded.
This was referenced Mar 23, 2023
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If divisor is power of 2.