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[dev.ssa] Merge branch 'master' into dev.ssa

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Change-Id: Iabc80b6e0734efbd234d998271e110d2eaad41dd
This commit is contained in:
David Chase 2016-05-27 15:18:49 -04:00
commit 31e13c83c2
507 changed files with 31557 additions and 5826 deletions
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51
src/cmd/compile/internal/ssa/config.go
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@ -9,23 +9,25 @@ import (
"crypto/sha1"
"fmt"
"os"
"strconv"
"strings"
)
type Config struct {
arch string // "amd64", etc.
IntSize int64 // 4 or 8
PtrSize int64 // 4 or 8
lowerBlock func(*Block) bool // lowering function
lowerValue func(*Value, *Config) bool // lowering function
registers []Register // machine registers
flagRegMask regMask // flag register mask
fe Frontend // callbacks into compiler frontend
HTML *HTMLWriter // html writer, for debugging
ctxt *obj.Link // Generic arch information
optimize bool // Do optimization
noDuffDevice bool // Don't use Duff's device
curFunc *Func
arch string // "amd64", etc.
IntSize int64 // 4 or 8
PtrSize int64 // 4 or 8
lowerBlock func(*Block) bool // lowering function
lowerValue func(*Value, *Config) bool // lowering function
registers []Register // machine registers
flagRegMask regMask // flag register mask
fe Frontend // callbacks into compiler frontend
HTML *HTMLWriter // html writer, for debugging
ctxt *obj.Link // Generic arch information
optimize bool // Do optimization
noDuffDevice bool // Don't use Duff's device
sparsePhiCutoff uint64 // Sparse phi location algorithm used above this #blocks*#variables score
curFunc *Func
// TODO: more stuff. Compiler flags of interest, ...
@ -162,10 +164,27 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.logfiles = make(map[string]*os.File)
// cutoff is compared with product of numblocks and numvalues,
// if product is smaller than cutoff, use old non-sparse method.
// cutoff == 0 implies all sparse.
// cutoff == -1 implies none sparse.
// Good cutoff values seem to be O(million) depending on constant factor cost of sparse.
// TODO: get this from a flag, not an environment variable
c.sparsePhiCutoff = 2500000 // 0 for testing. // 2500000 determined with crude experiments w/ make.bash
ev := os.Getenv("GO_SSA_PHI_LOC_CUTOFF")
if ev != "" {
v, err := strconv.ParseInt(ev, 10, 64)
if err != nil {
fe.Fatalf(0, "Environment variable GO_SSA_PHI_LOC_CUTOFF (value '%s') did not parse as a number", ev)
}
c.sparsePhiCutoff = uint64(v) // convert -1 to maxint, for never use sparse
}
return c
}
func (c *Config) Frontend() Frontend { return c.fe }
func (c *Config) Frontend() Frontend { return c.fe }
func (c *Config) SparsePhiCutoff() uint64 { return c.sparsePhiCutoff }
// NewFunc returns a new, empty function object.
// Caller must call f.Free() before calling NewFunc again.
@ -262,3 +281,7 @@ func (c *Config) DebugHashMatch(evname, name string) bool {
}
return false
}
func (c *Config) DebugNameMatch(evname, name string) bool {
return os.Getenv(evname) == name
}