cmd/compile: pass frame size to defframe

Preparation for de-globalizing Stksize and MaxArg.

Passes toolstash -cmp. No compiler performance impact.

Updates #15756

Change-Id: I312f0bbd15587a6aebf472cd66c8e62b89e55c8a
Reviewed-on: https://go-review.googlesource.com/38328
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Author: josharian

src/cmd/compile/internal/amd64/ggen.go

@@ -13,12 +13,12 @@ import (
 // no floating point in note handlers on Plan 9
 var isPlan9 = obj.GOOS == "plan9"
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables

src/cmd/compile/internal/arm/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/arm"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to contain ambiguously live variables

src/cmd/compile/internal/arm64/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/arm64"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 
 	// arm64 requires that the frame size (not counting saved LR)
 	// be empty or be 8 mod 16. If not, pad it.

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

@@ -365,7 +365,7 @@ type Arch struct {
 	MAXWIDTH int64
 	Use387   bool // should 386 backend use 387 FP instructions instead of sse2.
 
-	Defframe func(*obj.Prog, *Node)
+	Defframe func(*obj.Prog, *Node, int64)
 	Ginsnop  func()
 	Proginfo func(*obj.Prog) ProgInfo
 

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

@@ -4355,7 +4355,7 @@ func genssa(f *ssa.Func, ptxt *obj.Prog, gcargs, gclocals *Sym) {
 	liveness(e.curfn, ptxt, gcargs, gclocals)
 
 	// Add frame prologue. Zero ambiguously live variables.
-	thearch.Defframe(ptxt, e.curfn)
+	thearch.Defframe(ptxt, e.curfn, Stksize+Maxarg)
 	if Debug['f'] != 0 {
 		frame(0)
 	}

src/cmd/compile/internal/mips/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/mips"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables

src/cmd/compile/internal/mips64/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/mips"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables

src/cmd/compile/internal/ppc64/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/ppc64"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables

src/cmd/compile/internal/s390x/ggen.go

@@ -16,12 +16,12 @@ import (
 // Must be between 256 and 4096.
 const clearLoopCutoff = 1024
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables

src/cmd/compile/internal/x86/ggen.go

@@ -10,12 +10,12 @@ import (
 	"cmd/internal/obj/x86"
 )
 
-func defframe(ptxt *obj.Prog, fn *gc.Node) {
+func defframe(ptxt *obj.Prog, fn *gc.Node, sz int64) {
 	// fill in argument size, stack size
 	ptxt.To.Type = obj.TYPE_TEXTSIZE
 
 	ptxt.To.Val = int32(gc.Rnd(fn.Type.ArgWidth(), int64(gc.Widthptr)))
-	frame := uint32(gc.Rnd(gc.Stksize+gc.Maxarg, int64(gc.Widthreg)))
+	frame := uint32(gc.Rnd(sz, int64(gc.Widthreg)))
 	ptxt.To.Offset = int64(frame)
 
 	// insert code to zero ambiguously live variables