x64 backend: add lowerings with load-op-store fusion. (#4071)

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x64 backend: add lowerings with load-op-store fusion.

These lowerings use the `OP [mem], reg` forms (or in AT&T syntax, `OP
%reg, (mem)`) -- i.e., x86 instructions that load from memory, perform
an ALU operation, and store the result, all in one instruction. Using
these instruction forms, we can merge three CLIF ops together: a load,
an arithmetic operation, and a store.

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This commit is contained in:

Chris Fallin

2022-04-26 18:58:26 -07:00

committed by GitHub

parent 164bfeaf7e

commit dd45f44511

9 changed files with 1442 additions and 298 deletions

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cranelift/codegen/src/isa/x64/lower/isle/generated_code.rs generated

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