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f2df1e3c34
in progress; doesn't fully work until they are also passed on register on the caller side. For #40724. Change-Id: I29a6680e60bdbe9d132782530214f2a2b51fb8f6 Reviewed-on: https://go-review.googlesource.com/c/go/+/293394 Trust: David Chase <drchase@google.com> Run-TryBot: David Chase <drchase@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ssa
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// convert to machine-dependent ops
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func lower(f *Func) {
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// repeat rewrites until we find no more rewrites
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applyRewrite(f, f.Config.lowerBlock, f.Config.lowerValue, removeDeadValues)
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}
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// checkLower checks for unlowered opcodes and fails if we find one.
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func checkLower(f *Func) {
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// Needs to be a separate phase because it must run after both
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// lowering and a subsequent dead code elimination (because lowering
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// rules may leave dead generic ops behind).
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for _, b := range f.Blocks {
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for _, v := range b.Values {
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if !opcodeTable[v.Op].generic {
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continue // lowered
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}
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switch v.Op {
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case OpSP, OpSB, OpInitMem, OpArg, OpArgIntReg, OpArgFloatReg, OpPhi, OpVarDef, OpVarKill, OpVarLive, OpKeepAlive, OpSelect0, OpSelect1, OpSelectN, OpConvert, OpInlMark:
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continue // ok not to lower
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case OpMakeResult:
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if len(b.Controls) == 1 && b.Controls[0] == v {
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continue
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}
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case OpGetG:
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if f.Config.hasGReg {
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// has hardware g register, regalloc takes care of it
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continue // ok not to lower
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}
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}
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s := "not lowered: " + v.String() + ", " + v.Op.String() + " " + v.Type.SimpleString()
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for _, a := range v.Args {
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s += " " + a.Type.SimpleString()
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}
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f.Fatalf("%s", s)
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}
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}
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}
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