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Switch Cranelift over to regalloc2. (#3989)

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This PR switches Cranelift over to the new register allocator, regalloc2.

See [this document](https://gist.github.com/cfallin/08553421a91f150254fe878f67301801)
for a summary of the design changes. This switchover has implications for
core VCode/MachInst types and the lowering pass.

Overall, this change brings improvements to both compile time and speed of
generated code (runtime), as reported in #3942:

```
Benchmark       Compilation (wallclock)     Execution (wallclock)
blake3-scalar   25% faster                  28% faster
blake3-simd     no diff                     no diff
meshoptimizer   19% faster                  17% faster
pulldown-cmark  17% faster                  no diff
bz2             15% faster                  no diff
SpiderMonkey,   21% faster                  2% faster
  fib(30)
clang.wasm      42% faster                  N/A
```
This commit is contained in:
Chris Fallin
2022-04-14 10:28:21 -07:00
committed by GitHub
parent bfae6384aa
commit a0318f36f0
181 changed files with 16887 additions and 21587 deletions
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15
cranelift/codegen/src/isa/aarch64/lower.rs
View File

@@ -7,21 +7,18 @@
//!
//! - Floating-point immediates (FIMM instruction).
use super::lower_inst;
use crate::data_value::DataValue;
use crate::ir::condcodes::{FloatCC, IntCC};
use crate::ir::types::*;
use crate::ir::Inst as IRInst;
use crate::ir::{Opcode, Type, Value};
use crate::machinst::lower::*;
use crate::machinst::*;
use crate::{CodegenError, CodegenResult};
use crate::isa::aarch64::inst::*;
use crate::isa::aarch64::AArch64Backend;
use super::lower_inst;
use crate::data_value::DataValue;
use regalloc::{Reg, Writable};
use crate::machinst::lower::*;
use crate::machinst::*;
use crate::machinst::{Reg, Writable};
use crate::{CodegenError, CodegenResult};
use smallvec::SmallVec;
use std::cmp;