cmd/compile: unexport gc.Sysfunc

Updates #21352

Change-Id: If21342f30be32e25840b4072b932a6d4257b420d
Reviewed-on: https://go-review.googlesource.com/54091
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Avelino <t@avelino.xxx>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

src/cmd/compile/internal/gc/gen.go

@@ -11,7 +11,7 @@ import (
 	"strconv"
 )
 
-func Sysfunc(name string) *obj.LSym {
+func sysfunc(name string) *obj.LSym {
 	return Runtimepkg.Lookup(name).Linksym()
 }
 

src/cmd/compile/internal/gc/reflect.go

@@ -788,7 +788,7 @@ func dcommontype(lsym *obj.LSym, ot int, t *types.Type) int {
 
 	sizeofAlg := 2 * Widthptr
 	if algarray == nil {
-		algarray = Sysfunc("algarray")
+		algarray = sysfunc("algarray")
 	}
 	dowidth(t)
 	alg := algtype(t)
@@ -1586,8 +1586,8 @@ func dalgsym(t *types.Type) *obj.LSym {
 		s.SetAlgGen(true)
 
 		if memhashvarlen == nil {
-			memhashvarlen = Sysfunc("memhash_varlen")
-			memequalvarlen = Sysfunc("memequal_varlen")
+			memhashvarlen = sysfunc("memhash_varlen")
+			memequalvarlen = sysfunc("memequal_varlen")
 		}
 
 		// make hash closure

src/cmd/compile/internal/gc/ssa.go

@@ -70,32 +70,32 @@ func initssaconfig() {
 	ssaCaches = make([]ssa.Cache, nBackendWorkers)
 
 	// Set up some runtime functions we'll need to call.
-	Newproc = Sysfunc("newproc")
-	Deferproc = Sysfunc("deferproc")
-	Deferreturn = Sysfunc("deferreturn")
-	Duffcopy = Sysfunc("duffcopy")
-	Duffzero = Sysfunc("duffzero")
-	panicindex = Sysfunc("panicindex")
-	panicslice = Sysfunc("panicslice")
-	panicdivide = Sysfunc("panicdivide")
-	growslice = Sysfunc("growslice")
-	panicdottypeE = Sysfunc("panicdottypeE")
-	panicdottypeI = Sysfunc("panicdottypeI")
-	panicnildottype = Sysfunc("panicnildottype")
-	assertE2I = Sysfunc("assertE2I")
-	assertE2I2 = Sysfunc("assertE2I2")
-	assertI2I = Sysfunc("assertI2I")
-	assertI2I2 = Sysfunc("assertI2I2")
-	goschedguarded = Sysfunc("goschedguarded")
-	writeBarrier = Sysfunc("writeBarrier")
-	writebarrierptr = Sysfunc("writebarrierptr")
-	typedmemmove = Sysfunc("typedmemmove")
-	typedmemclr = Sysfunc("typedmemclr")
-	Udiv = Sysfunc("udiv")
+	Newproc = sysfunc("newproc")
+	Deferproc = sysfunc("deferproc")
+	Deferreturn = sysfunc("deferreturn")
+	Duffcopy = sysfunc("duffcopy")
+	Duffzero = sysfunc("duffzero")
+	panicindex = sysfunc("panicindex")
+	panicslice = sysfunc("panicslice")
+	panicdivide = sysfunc("panicdivide")
+	growslice = sysfunc("growslice")
+	panicdottypeE = sysfunc("panicdottypeE")
+	panicdottypeI = sysfunc("panicdottypeI")
+	panicnildottype = sysfunc("panicnildottype")
+	assertE2I = sysfunc("assertE2I")
+	assertE2I2 = sysfunc("assertE2I2")
+	assertI2I = sysfunc("assertI2I")
+	assertI2I2 = sysfunc("assertI2I2")
+	goschedguarded = sysfunc("goschedguarded")
+	writeBarrier = sysfunc("writeBarrier")
+	writebarrierptr = sysfunc("writebarrierptr")
+	typedmemmove = sysfunc("typedmemmove")
+	typedmemclr = sysfunc("typedmemclr")
+	Udiv = sysfunc("udiv")
 
 	// GO386=387 runtime functions
-	ControlWord64trunc = Sysfunc("controlWord64trunc")
-	ControlWord32 = Sysfunc("controlWord32")
+	ControlWord64trunc = sysfunc("controlWord64trunc")
+	ControlWord32 = sysfunc("controlWord32")
 }
 
 // buildssa builds an SSA function for fn.