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[dev.ssa] cmd/compile: remove flags from regMask

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Reg allocator skips flag-typed values. Flag allocator uses the type
and whether the op has "clobberFlags" set.

Tested on AMD64, ARM, ARM64, 386. Passed 'toolstash -cmp' on AMD64.
PPC64 is coded blindly.

Change-Id: Ib1cc27efecef6a1bb27f7d7ed035a582660d244f
Reviewed-on: https://go-review.googlesource.com/25480
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang 2016-08-04 06:57:34 -04:00
parent 01ae4b1da4
commit 0484052358
11 changed files with 1018 additions and 1415 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/cmd/compile/internal/ssa/config.go
View file

@ -22,7 +22,6 @@ type Config struct {
registers []Register // machine registers
gpRegMask regMask // general purpose integer register mask
fpRegMask regMask // floating point register mask
flagRegMask regMask // flag register mask
FPReg int8 // register number of frame pointer, -1 if not used
hasGReg bool // has hardware g register
fe Frontend // callbacks into compiler frontend
@ -137,7 +136,6 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.registers = registersAMD64[:]
c.gpRegMask = gpRegMaskAMD64
c.fpRegMask = fpRegMaskAMD64
c.flagRegMask = flagRegMaskAMD64
c.FPReg = framepointerRegAMD64
c.hasGReg = false
case "386":
@ -148,7 +146,6 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.registers = registers386[:]
c.gpRegMask = gpRegMask386
c.fpRegMask = fpRegMask386
c.flagRegMask = flagRegMask386
c.FPReg = framepointerReg386
c.hasGReg = false
case "arm":
@ -159,7 +156,6 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.registers = registersARM[:]
c.gpRegMask = gpRegMaskARM
c.fpRegMask = fpRegMaskARM
c.flagRegMask = flagRegMaskARM
c.FPReg = framepointerRegARM
c.hasGReg = true
case "arm64":
@ -170,7 +166,6 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.registers = registersARM64[:]
c.gpRegMask = gpRegMaskARM64
c.fpRegMask = fpRegMaskARM64
c.flagRegMask = flagRegMaskARM64
c.FPReg = framepointerRegARM64
c.hasGReg = true
case "ppc64le":
@ -181,7 +176,6 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link, optimize bool) *Config
c.registers = registersPPC64[:]
c.gpRegMask = gpRegMaskPPC64
c.fpRegMask = fpRegMaskPPC64
c.flagRegMask = flagRegMaskPPC64
c.FPReg = framepointerRegPPC64
c.noDuffDevice = true // TODO: Resolve PPC64 DuffDevice (has zero, but not copy)
c.hasGReg = true