From ae7e0ad7b8cdc16b6a7d5043375bb92a9cf6190a Mon Sep 17 00:00:00 2001
From: Matthew Dempsky <mdempsky@google.com>
Date: Thu, 15 Sep 2016 16:21:56 -0700
Subject: [PATCH] cmd/compile: remove more dead code

Change-Id: I0131b0d7421ff1397f16a08eff758250abbdf8e2
Reviewed-on: https://go-review.googlesource.com/29239
Reviewed-by: Dave Cheney <dave@cheney.net>
---
 src/cmd/compile/internal/amd64/prog.go  | 12 ------------
 src/cmd/compile/internal/arm/gsubr.go   | 24 +-----------------------
 src/cmd/compile/internal/arm64/gsubr.go | 25 +------------------------
 src/cmd/compile/internal/gc/gsubr.go    | 20 --------------------
 src/cmd/compile/internal/gc/pgen.go     |  2 --
 5 files changed, 2 insertions(+), 81 deletions(-)

diff --git a/src/cmd/compile/internal/amd64/prog.go b/src/cmd/compile/internal/amd64/prog.go
index b8f6f0612d..42b3c4d82e 100644
--- a/src/cmd/compile/internal/amd64/prog.go
+++ b/src/cmd/compile/internal/amd64/prog.go
@@ -274,18 +274,6 @@ var progtable = [x86.ALAST & obj.AMask]obj.ProgInfo{
 	x86.AXORPS & obj.AMask:    {Flags: gc.LeftRead | RightRdwr},
 }
 
-func progflags(p *obj.Prog) uint32 {
-	flags := progtable[p.As&obj.AMask].Flags
-	if flags&gc.ImulAXDX != 0 && p.To.Type != obj.TYPE_NONE {
-		flags |= RightRdwr
-	}
-	return flags
-}
-
-func progcarryflags(p *obj.Prog) uint32 {
-	return progtable[p.As&obj.AMask].Flags
-}
-
 func proginfo(p *obj.Prog) {
 	info := &p.Info
 	*info = progtable[p.As&obj.AMask]
diff --git a/src/cmd/compile/internal/arm/gsubr.go b/src/cmd/compile/internal/arm/gsubr.go
index e6e2139d48..30c2b75598 100644
--- a/src/cmd/compile/internal/arm/gsubr.go
+++ b/src/cmd/compile/internal/arm/gsubr.go
@@ -30,31 +30,9 @@
 
 package arm
 
-import (
-	"cmd/compile/internal/gc"
-	"cmd/internal/obj"
-	"cmd/internal/obj/arm"
-)
+import "cmd/internal/obj/arm"
 
 var resvd = []int{
 	arm.REG_R9,  // formerly reserved for m; might be okay to reuse now; not sure about NaCl
 	arm.REG_R10, // reserved for g
 }
-
-/*
- * insert n into reg slot of p
- */
-func raddr(n *gc.Node, p *obj.Prog) {
-	var a obj.Addr
-	gc.Naddr(&a, n)
-	if a.Type != obj.TYPE_REG {
-		if n != nil {
-			gc.Fatalf("bad in raddr: %v", n.Op)
-		} else {
-			gc.Fatalf("bad in raddr: <null>")
-		}
-		p.Reg = 0
-	} else {
-		p.Reg = a.Reg
-	}
-}
diff --git a/src/cmd/compile/internal/arm64/gsubr.go b/src/cmd/compile/internal/arm64/gsubr.go
index b6b71f01be..f65ffe54b5 100644
--- a/src/cmd/compile/internal/arm64/gsubr.go
+++ b/src/cmd/compile/internal/arm64/gsubr.go
@@ -30,11 +30,7 @@
 
 package arm64
 
-import (
-	"cmd/compile/internal/gc"
-	"cmd/internal/obj"
-	"cmd/internal/obj/arm64"
-)
+import "cmd/internal/obj/arm64"
 
 var resvd = []int{
 	arm64.REGTMP,
@@ -43,22 +39,3 @@ var resvd = []int{
 	arm64.REGRT2,
 	arm64.REG_R31, // REGZERO and REGSP
 }
-
-/*
- * insert n into reg slot of p
- */
-func raddr(n *gc.Node, p *obj.Prog) {
-	var a obj.Addr
-
-	gc.Naddr(&a, n)
-	if a.Type != obj.TYPE_REG {
-		if n != nil {
-			gc.Fatalf("bad in raddr: %v", n.Op)
-		} else {
-			gc.Fatalf("bad in raddr: <null>")
-		}
-		p.Reg = 0
-	} else {
-		p.Reg = a.Reg
-	}
-}
diff --git a/src/cmd/compile/internal/gc/gsubr.go b/src/cmd/compile/internal/gc/gsubr.go
index c0150fd030..291fb5645c 100644
--- a/src/cmd/compile/internal/gc/gsubr.go
+++ b/src/cmd/compile/internal/gc/gsubr.go
@@ -601,23 +601,3 @@ func Gins(as obj.As, f, t *Node) *obj.Prog {
 	}
 	return p
 }
-
-var reg [100]int       // count of references to reg
-var regstk [100][]byte // allocation sites, when -v is given
-
-func ginit() {
-	for r := range reg {
-		reg[r] = 1
-	}
-
-	for r := Thearch.REGMIN; r <= Thearch.REGMAX; r++ {
-		reg[r-Thearch.REGMIN] = 0
-	}
-	for r := Thearch.FREGMIN; r <= Thearch.FREGMAX; r++ {
-		reg[r-Thearch.REGMIN] = 0
-	}
-
-	for _, r := range Thearch.ReservedRegs {
-		reg[r-Thearch.REGMIN] = 1
-	}
-}
diff --git a/src/cmd/compile/internal/gc/pgen.go b/src/cmd/compile/internal/gc/pgen.go
index bfe1cd21b0..95618175eb 100644
--- a/src/cmd/compile/internal/gc/pgen.go
+++ b/src/cmd/compile/internal/gc/pgen.go
@@ -420,8 +420,6 @@ func compile(fn *Node) {
 		}
 	}
 
-	ginit()
-
 	gcargs := makefuncdatasym("gcargs·", obj.FUNCDATA_ArgsPointerMaps)
 	gclocals := makefuncdatasym("gclocals·", obj.FUNCDATA_LocalsPointerMaps)