mirror of https://github.com/golang/go.git
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
// Copyright 2013 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 obj
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// Garbage collector liveness bitmap generation.
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// The command line flag -live causes this code to print debug information.
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// The levels are:
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//
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// -live (aka -live=1): print liveness lists as code warnings at safe points
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// -live=2: print an assembly listing with liveness annotations
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// -live=3: print information during each computation phase (much chattier)
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//
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// Each level includes the earlier output as well.
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// Copyright 2012 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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// Used by cmd/gc.
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const (
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GcBits = 4
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BitsPerPointer = 2
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BitsDead = 0
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BitsScalar = 1
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BitsPointer = 2
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BitsMask = 3
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PointersPerByte = 8 / BitsPerPointer
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)
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const (
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InsData = 1 + iota
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InsArray
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InsArrayEnd
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InsEnd
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MaxGCMask = 65536
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)
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