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067e8dfd82
Semi-regular merge of tip to dev.ssa. Complicated a bit by the move of cmd/internal/* to cmd/compile/internal/*. Change-Id: I1c66d3c29bb95cce4a53c5a3476373aa5245303d
48 lines
1.2 KiB
Go
48 lines
1.2 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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import "log"
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type Config struct {
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arch string // "amd64", etc.
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ptrSize int64 // 4 or 8
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Uintptr Type // pointer arithmetic type
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lower func(*Value) bool // lowering function
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// TODO: more stuff. Compiler flags of interest, ...
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}
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// NewConfig returns a new configuration object for the given architecture.
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func NewConfig(arch string) *Config {
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c := &Config{arch: arch}
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switch arch {
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case "amd64":
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c.ptrSize = 8
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c.lower = lowerAmd64
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case "386":
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c.ptrSize = 4
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c.lower = lowerAmd64 // TODO(khr): full 32-bit support
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default:
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log.Fatalf("arch %s not implemented", arch)
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}
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// cache the intptr type in the config
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c.Uintptr = TypeUInt32
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if c.ptrSize == 8 {
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c.Uintptr = TypeUInt64
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}
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return c
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}
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// NewFunc returns a new, empty function object
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func (c *Config) NewFunc() *Func {
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// TODO(khr): should this function take name, type, etc. as arguments?
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return &Func{Config: c}
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}
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// TODO(khr): do we really need a separate Config, or can we just
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// store all its fields inside a Func?
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