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compile.go
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compile.go
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/*
* Copyright 2022 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ssa
import (
`github.com/cloudwego/frugal/internal/atm/hir`
)
type Pass interface {
Apply(*CFG)
}
type PassDescriptor struct {
Pass Pass
Desc string
}
var Passes = [...]PassDescriptor {
{ Desc: "Constant Propagation" , Pass: new(ConstProp) },
{ Desc: "Common Sub-expression Elimination" , Pass: new(CSE) },
{ Desc: "Early Phi Elimination" , Pass: new(PhiElim) },
{ Desc: "Early Copy Elimination" , Pass: new(CopyElim) },
{ Desc: "Early Trivial Dead Code Elimination" , Pass: new(TDCE) },
{ Desc: "Branch Elimination" , Pass: new(BranchElim) },
{ Desc: "Late Phi Elimination" , Pass: new(PhiElim) },
{ Desc: "Late Copy Elimination" , Pass: new(CopyElim) },
{ Desc: "Late Trivial Dead Code Elimination" , Pass: new(TDCE) },
{ Desc: "Intermediate Block Merging" , Pass: new(BlockMerge) },
// { Desc: "Write Barrier Insertion" , Pass: new(WriteBarrier) },
// { Desc: "Machine Dependent Lowering" , Pass: new(Lowering) },
}
func applySSAPasses(cfg *CFG) {
for _, p := range Passes {
p.Pass.Apply(cfg)
}
}
func Compile(p hir.Program) (cfg *CFG) {
cfg = newGraphBuilder().build(p)
insertPhiNodes(&cfg.DominatorTree)
renameRegisters(&cfg.DominatorTree)
applySSAPasses(cfg)
return
}