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Add uadd_overflow_trap (#5123)

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Add a new instruction uadd_overflow_trap, which is a fused version of iadd_ifcout and trapif. Adding this instruction removes a dependency on the iflags type, and would allow us to move closer to removing it entirely.

The instruction is defined for the i32 and i64 types only, and is currently only used in the legalization of heap_addr.
This commit is contained in:
Trevor Elliott
2022-10-27 09:43:15 -07:00
committed by GitHub
parent 0290a83502
commit 02620441c3
23 changed files with 660 additions and 18 deletions
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8
cranelift/codegen/src/prelude_lower.isle
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@@ -425,6 +425,14 @@
(_y Unit (emit consumer_inst)))
(value_regs producer_result consumer_result)))
;; A flag-producer that also produces a result, paired with a consumer that has
;; no results.
(rule (with_flags (ProducesFlags.ProducesFlagsReturnsResultWithConsumer producer_inst producer_result)
(ConsumesFlags.ConsumesFlagsSideEffect consumer_inst))
(let ((_ Unit (emit producer_inst))
(_ Unit (emit consumer_inst)))
(value_reg producer_result)))
(rule (with_flags (ProducesFlags.ProducesFlagsSideEffect producer_inst)
(ConsumesFlags.ConsumesFlagsReturnsReg consumer_inst consumer_result))
(let ((_x Unit (emit producer_inst))