cmd/compile: initialize SSA runtime functions in initssaconfig

This is a better home for it.

Change-Id: I7ce96c16378d841613edaa53c07347b0ac99ea6e
Reviewed-on: https://go-review.googlesource.com/38970
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

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

@@ -250,25 +250,6 @@ func (s *ssafn) AllocFrame(f *ssa.Func) {
 }
 
 func compile(fn *Node) {
-	if Newproc == nil {
-		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")
-	}
-
 	Curfn = fn
 	dowidth(fn.Type)
 

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

@@ -66,6 +66,24 @@ func initssaconfig() {
 		ssaConfig.Set387(thearch.Use387)
 	}
 	ssaCache = new(ssa.Cache)
+
+	// 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")
 }
 
 // buildssa builds an SSA function.