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cmd/compile: enable rewritings that are blocked by old backends

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Old backends did not implement them, but SSA do.

Change-Id: I543b2281dcf4bab0da37c9b1f26a5ef55a0ea11b
Reviewed-on: https://go-review.googlesource.com/29278
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 2016-09-16 09:27:06 -04:00
parent 8607bed744
commit 882dd1c3ba
2 changed files with 5 additions and 9 deletions
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8
src/cmd/compile/internal/gc/walk.go
View File

@ -3387,8 +3387,7 @@ func samecheap(a *Node, b *Node) bool {
// The result of walkrotate MUST be assigned back to n, e.g.
// n.Left = walkrotate(n.Left)
func walkrotate(n *Node) *Node {
//TODO: enable LROT on ARM64 once the old backend is gone
if Thearch.LinkArch.InFamily(sys.MIPS64, sys.ARM64, sys.PPC64) {
if Thearch.LinkArch.InFamily(sys.MIPS64, sys.PPC64) {
return n
}
@ -3647,11 +3646,6 @@ ret:
func walkdiv(n *Node, init *Nodes) *Node {
// if >= 0, nr is 1<<pow // 1 if nr is negative.
// TODO(minux)
if Thearch.LinkArch.InFamily(sys.MIPS64, sys.PPC64) {
return n
}
if n.Right.Op != OLITERAL {
return n
}

6
src/cmd/compile/internal/ppc64/prog.go
View File

@ -54,8 +54,10 @@ var progtable = [ppc64.ALAST & obj.AMask]obj.ProgInfo{
ppc64.AEQV & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULLD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULLW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHD & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHDU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHDU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.AMULHWU & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ADIVD & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ADIVDU & obj.AMask: {Flags: gc.SizeQ | gc.LeftRead | gc.RegRead | gc.RightWrite},
ppc64.ADIVW & obj.AMask: {Flags: gc.SizeL | gc.LeftRead | gc.RegRead | gc.RightWrite},