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cranelift: remove load_complex and store_complex (#3976)

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This change removes all variants of `load*_complex` and `store*_complex`
from Cranelift; this is a breaking change to the instructions exposed by
CLIF. The complete list of instructions removed is: `load_complex`,
`store_complex`, `uload8_complex`, `sload8_complex`, `istore8_complex`,
`sload8_complex`, `uload16_complex`, `sload16_complex`,
`istore16_complex`, `uload32_complex`, `sload32_complex`,
`istore32_complex`, `uload8x8_complex`, `sload8x8_complex`,
`sload16x4_complex`, `uload16x4_complex`, `uload32x2_complex`,
`sload32x2_complex`.

The rationale for this removal is that the Cranelift backend now has the
ability to pattern-match multiple upstream additions in order to
calculate the address to access. Previously, this was not possible so
the `*_complex` instructions were needed. Over time, these instructions
have fallen out of use in this repository, making the additional
overhead of maintaining them a chore.
This commit is contained in:
Andrew Brown
2022-03-31 10:05:10 -07:00
committed by GitHub
parent c8daf0b8db
commit bd6fe11ca9
20 changed files with 51 additions and 892 deletions
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4
cranelift/codegen/src/machinst/lower.rs
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@@ -1101,10 +1101,8 @@ impl<'func, I: VCodeInst> LowerCtx for Lower<'func, I> {
&InstructionData::AtomicCas { flags, .. } => Some(flags),
&InstructionData::AtomicRmw { flags, .. } => Some(flags),
&InstructionData::Load { flags, .. }
| &InstructionData::LoadComplex { flags, .. }
| &InstructionData::LoadNoOffset { flags, .. }
| &InstructionData::Store { flags, .. }
| &InstructionData::StoreComplex { flags, .. } => Some(flags),
| &InstructionData::Store { flags, .. } => Some(flags),
&InstructionData::StoreNoOffset { flags, .. } => Some(flags),
_ => None,
}