diff --git a/src/cmd/compile/internal/ssa/gen/main.go b/src/cmd/compile/internal/ssa/gen/main.go
index 78613ad352..ea6fa87813 100644
--- a/src/cmd/compile/internal/ssa/gen/main.go
+++ b/src/cmd/compile/internal/ssa/gen/main.go
@@ -95,8 +95,7 @@ func main() {
 
 func genOp() {
 	w := new(bytes.Buffer)
-	fmt.Fprintf(w, "// autogenerated: do not edit!\n")
-	fmt.Fprintf(w, "// generated from gen/*Ops.go\n")
+	fmt.Fprintf(w, "// Code generated from gen/*Ops.go; DO NOT EDIT.\n")
 	fmt.Fprintln(w)
 	fmt.Fprintln(w, "package ssa")
 
diff --git a/src/cmd/compile/internal/ssa/gen/rulegen.go b/src/cmd/compile/internal/ssa/gen/rulegen.go
index 0e478d052f..d51c22ce11 100644
--- a/src/cmd/compile/internal/ssa/gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/gen/rulegen.go
@@ -148,7 +148,7 @@ func genRules(arch arch) {
 
 	// Start output buffer, write header.
 	w := new(bytes.Buffer)
-	fmt.Fprintf(w, "// autogenerated from gen/%s.rules: do not edit!\n", arch.name)
+	fmt.Fprintf(w, "// Code generated from gen/%s.rules; DO NOT EDIT.\n", arch.name)
 	fmt.Fprintln(w, "// generated with: cd gen; go run *.go")
 	fmt.Fprintln(w)
 	fmt.Fprintln(w, "package ssa")
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go
index 4b7a6b87b1..1b02256684 100644
--- a/src/cmd/compile/internal/ssa/opGen.go
+++ b/src/cmd/compile/internal/ssa/opGen.go
@@ -1,5 +1,4 @@
-// autogenerated: do not edit!
-// generated from gen/*Ops.go
+// Code generated from gen/*Ops.go; DO NOT EDIT.
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go
index 9330485813..2aed1dcb22 100644
--- a/src/cmd/compile/internal/ssa/rewrite386.go
+++ b/src/cmd/compile/internal/ssa/rewrite386.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/386.rules: do not edit!
+// Code generated from gen/386.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index 405be0cc9a..99c4a0a854 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/AMD64.rules: do not edit!
+// Code generated from gen/AMD64.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteARM.go b/src/cmd/compile/internal/ssa/rewriteARM.go
index 714ec4937a..7cb6f19897 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/ARM.rules: do not edit!
+// Code generated from gen/ARM.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go
index e7436e72f4..10f2f882c1 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM64.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/ARM64.rules: do not edit!
+// Code generated from gen/ARM64.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteMIPS.go b/src/cmd/compile/internal/ssa/rewriteMIPS.go
index 0f8321440b..3dd97ad0af 100644
--- a/src/cmd/compile/internal/ssa/rewriteMIPS.go
+++ b/src/cmd/compile/internal/ssa/rewriteMIPS.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/MIPS.rules: do not edit!
+// Code generated from gen/MIPS.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteMIPS64.go b/src/cmd/compile/internal/ssa/rewriteMIPS64.go
index 8c13431997..e2f8a22b2e 100644
--- a/src/cmd/compile/internal/ssa/rewriteMIPS64.go
+++ b/src/cmd/compile/internal/ssa/rewriteMIPS64.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/MIPS64.rules: do not edit!
+// Code generated from gen/MIPS64.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewritePPC64.go b/src/cmd/compile/internal/ssa/rewritePPC64.go
index 0c10487906..090519bd32 100644
--- a/src/cmd/compile/internal/ssa/rewritePPC64.go
+++ b/src/cmd/compile/internal/ssa/rewritePPC64.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/PPC64.rules: do not edit!
+// Code generated from gen/PPC64.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewriteS390X.go b/src/cmd/compile/internal/ssa/rewriteS390X.go
index 9db644570f..6274d5475f 100644
--- a/src/cmd/compile/internal/ssa/rewriteS390X.go
+++ b/src/cmd/compile/internal/ssa/rewriteS390X.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/S390X.rules: do not edit!
+// Code generated from gen/S390X.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewritedec.go b/src/cmd/compile/internal/ssa/rewritedec.go
index f82a26a417..539c05d4d9 100644
--- a/src/cmd/compile/internal/ssa/rewritedec.go
+++ b/src/cmd/compile/internal/ssa/rewritedec.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/dec.rules: do not edit!
+// Code generated from gen/dec.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewritedec64.go b/src/cmd/compile/internal/ssa/rewritedec64.go
index 224bb94262..605128c767 100644
--- a/src/cmd/compile/internal/ssa/rewritedec64.go
+++ b/src/cmd/compile/internal/ssa/rewritedec64.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/dec64.rules: do not edit!
+// Code generated from gen/dec64.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa
diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go
index 685d147978..bcef89cbc7 100644
--- a/src/cmd/compile/internal/ssa/rewritegeneric.go
+++ b/src/cmd/compile/internal/ssa/rewritegeneric.go
@@ -1,4 +1,4 @@
-// autogenerated from gen/generic.rules: do not edit!
+// Code generated from gen/generic.rules; DO NOT EDIT.
 // generated with: cd gen; go run *.go
 
 package ssa