| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package obj |
| |
| // Garbage collector liveness bitmap generation. |
| |
| // The command line flag -live causes this code to print debug information. |
| // The levels are: |
| // |
| // -live (aka -live=1): print liveness lists as code warnings at safe points |
| // -live=2: print an assembly listing with liveness annotations |
| // -live=3: print information during each computation phase (much chattier) |
| // |
| // Each level includes the earlier output as well. |
| |
| // Copyright 2012 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Used by cmd/gc. |
| |
| const ( |
| GcBits = 4 |
| BitsPerPointer = 2 |
| BitsDead = 0 |
| BitsScalar = 1 |
| BitsPointer = 2 |
| BitsMask = 3 |
| PointersPerByte = 8 / BitsPerPointer |
| InsData = 1 + iota - 7 |
| InsArray |
| InsArrayEnd |
| InsEnd |
| MaxGCMask = 65536 |
| ) |
