T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Switch Cranelift over to regalloc2. (#3989)

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

10
cranelift/codegen/src/isa/aarch64/inst/emit_tests.rs
View File

@@ -27,7 +27,7 @@ fn test_aarch64_binemit() {
// Then:
//
// $ echo "mov x1, x2" | aarch64inst.sh
insns.push((Inst::Ret, "C0035FD6", "ret"));
insns.push((Inst::Ret { rets: vec![] }, "C0035FD6", "ret"));
insns.push((Inst::Nop0, "", "nop-zero-len"));
insns.push((Inst::Nop4, "1F2003D5", "nop"));
insns.push((
@@ -1631,7 +1631,7 @@ fn test_aarch64_binemit() {
flags: MemFlags::trusted(),
},
"E18040F8",
"ldur x1, [x7, #8]",
"ldr x1, [x7, #8]",
));
insns.push((
@@ -6794,7 +6794,6 @@ fn test_aarch64_binemit() {
insns.push((Inst::Fence {}, "BF3B03D5", "dmb ish"));
let flags = settings::Flags::new(settings::builder());
let rru = create_reg_universe(&flags);
let emit_info = EmitInfo::new(flags);
for (insn, expected_encoding, expected_printing) in insns {
println!(
@@ -6803,11 +6802,12 @@ fn test_aarch64_binemit() {
);
// Check the printed text is as expected.
let actual_printing = insn.show_rru(Some(&rru));
let actual_printing =
insn.print_with_state(&mut EmitState::default(), &mut AllocationConsumer::new(&[]));
assert_eq!(expected_printing, actual_printing);
let mut buffer = MachBuffer::new();
insn.emit(&mut buffer, &emit_info, &mut Default::default());
insn.emit(&[], &mut buffer, &emit_info, &mut Default::default());
let buffer = buffer.finish();
let actual_encoding = &buffer.stringify_code_bytes();
assert_eq!(expected_encoding, actual_encoding);