cmd/internal/ssa: correct references to _gen folder

The gen folder was renamed to _gen in CL 435472, but references in code
and docs were not updated. This updates the references.

Change-Id: Ibadc0cdcb5bed145c3257b58465a8df370487ae5
Reviewed-on: https://go-review.googlesource.com/c/go/+/444355
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

28 files changed, 53 insertions, 53 deletions

diff --git a/src/cmd/compile/internal/ssa/README.md b/src/cmd/compile/internal/ssa/README.md
index d695fda045..27ac02b4a2 100644
--- a/src/cmd/compile/internal/ssa/README.md
+++ b/src/cmd/compile/internal/ssa/README.md
@@ -34,7 +34,7 @@ value is defined exactly once, but it may be used any number of times. A value
 mainly consists of a unique identifier, an operator, a type, and some arguments.
 
 An operator or `Op` describes the operation that computes the value. The
-semantics of each operator can be found in `gen/*Ops.go`. For example, `OpAdd8`
+semantics of each operator can be found in `_gen/*Ops.go`. For example, `OpAdd8`
 takes two value arguments holding 8-bit integers and results in their addition.
 Here is a possible SSA representation of the addition of two `uint8` values:
 
@@ -205,16 +205,16 @@ TODO: need more ideas for this section
 
 While most compiler passes are implemented directly in Go code, some others are
 code generated. This is currently done via rewrite rules, which have their own
-syntax and are maintained in `gen/*.rules`. Simpler optimizations can be written
+syntax and are maintained in `_gen/*.rules`. Simpler optimizations can be written
 easily and quickly this way, but rewrite rules are not suitable for more complex
 optimizations.
 
 To read more on rewrite rules, have a look at the top comments in
-[gen/generic.rules](gen/generic.rules) and [gen/rulegen.go](gen/rulegen.go).
+[_gen/generic.rules](_gen/generic.rules) and [_gen/rulegen.go](_gen/rulegen.go).
 
 Similarly, the code to manage operators is also code generated from
-`gen/*Ops.go`, as it is easier to maintain a few tables than a lot of code.
-After changing the rules or operators, see [gen/README](gen/README) for
+`_gen/*Ops.go`, as it is easier to maintain a few tables than a lot of code.
+After changing the rules or operators, see [_gen/README](_gen/README) for
 instructions on how to generate the Go code again.
 
 <!---
diff --git a/src/cmd/compile/internal/ssa/_gen/cover.bash b/src/cmd/compile/internal/ssa/_gen/cover.bash
index 6c860fc864..7311cfb5f3 100755
--- a/src/cmd/compile/internal/ssa/_gen/cover.bash
+++ b/src/cmd/compile/internal/ssa/_gen/cover.bash
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash 
+#!/usr/bin/env bash
 # Copyright 2020 The Go Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
@@ -9,7 +9,7 @@
 #     ./cover.bash && go tool cover -html=cover.out
 #
 # This script is needed to set up a temporary test file, so that we don't break
-# regular 'go run *.go' usage to run the generator.
+# regular 'go run .' usage to run the generator.
 
 cat >main_test.go <<-EOF
 	// +build ignore
diff --git a/src/cmd/compile/internal/ssa/_gen/main.go b/src/cmd/compile/internal/ssa/_gen/main.go
index b3fbe96ba7..6326c07645 100644
--- a/src/cmd/compile/internal/ssa/_gen/main.go
+++ b/src/cmd/compile/internal/ssa/_gen/main.go
@@ -188,7 +188,7 @@ func main() {
 
 func genOp() {
 	w := new(bytes.Buffer)
-	fmt.Fprintf(w, "// Code generated from gen/*Ops.go; DO NOT EDIT.\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 aa038255e1..80fa37a86b 100644
--- a/src/cmd/compile/internal/ssa/_gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/_gen/rulegen.go
@@ -576,8 +576,8 @@ func fprint(w io.Writer, n Node) {
 	case *File:
 		file := n
 		seenRewrite := make(map[[3]string]string)
-		fmt.Fprintf(w, "// Code generated from gen/%s%s.rules; DO NOT EDIT.\n", n.Arch.name, n.Suffix)
-		fmt.Fprintf(w, "// generated with: cd gen; go run *.go\n")
+		fmt.Fprintf(w, "// Code generated from _gen/%s%s.rules; DO NOT EDIT.\n", n.Arch.name, n.Suffix)
+		fmt.Fprintf(w, "// generated with: cd _gen; go run .\n")
 		fmt.Fprintf(w, "\npackage ssa\n")
 		for _, path := range append([]string{
 			"fmt",
diff --git a/src/cmd/compile/internal/ssa/addressingmodes.go b/src/cmd/compile/internal/ssa/addressingmodes.go
index 469ba0d494..699f6e45ae 100644
--- a/src/cmd/compile/internal/ssa/addressingmodes.go
+++ b/src/cmd/compile/internal/ssa/addressingmodes.go
@@ -196,7 +196,7 @@ var combine = map[[2]Op]Op{
 	[2]Op{OpAMD64MOVQstoreconst, OpAMD64LEAQ8}: OpAMD64MOVQstoreconstidx8,
 
 	// These instructions are re-split differently for performance, see needSplit above.
-	// TODO if 386 versions are created, also update needSplit and gen/386splitload.rules
+	// TODO if 386 versions are created, also update needSplit and _gen/386splitload.rules
 	[2]Op{OpAMD64CMPBload, OpAMD64ADDQ}: OpAMD64CMPBloadidx1,
 	[2]Op{OpAMD64CMPWload, OpAMD64ADDQ}: OpAMD64CMPWloadidx1,
 	[2]Op{OpAMD64CMPLload, OpAMD64ADDQ}: OpAMD64CMPLloadidx1,
diff --git a/src/cmd/compile/internal/ssa/op.go b/src/cmd/compile/internal/ssa/op.go
index d1b88d9f09..81e8d21fe9 100644
--- a/src/cmd/compile/internal/ssa/op.go
+++ b/src/cmd/compile/internal/ssa/op.go
@@ -16,7 +16,7 @@ import (
 // An Op encodes the specific operation that a Value performs.
 // Opcodes' semantics can be modified by the type and aux fields of the Value.
 // For instance, OpAdd can be 32 or 64 bit, signed or unsigned, float or complex, depending on Value.Type.
-// Semantics of each op are described in the opcode files in gen/*Ops.go.
+// Semantics of each op are described in the opcode files in _gen/*Ops.go.
 // There is one file for generic (architecture-independent) ops and one file
 // for each architecture.
 type Op int32
diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go
index dc0f0386b0..9087815d72 100644
--- a/src/cmd/compile/internal/ssa/opGen.go
+++ b/src/cmd/compile/internal/ssa/opGen.go
@@ -1,4 +1,4 @@
-// Code generated from gen/*Ops.go; DO NOT EDIT.
+// Code generated from _gen/*Ops.go; DO NOT EDIT.
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/regalloc.go b/src/cmd/compile/internal/ssa/regalloc.go
index 02faf8a7bd..806f6985c8 100644
--- a/src/cmd/compile/internal/ssa/regalloc.go
+++ b/src/cmd/compile/internal/ssa/regalloc.go
@@ -626,7 +626,7 @@ func (s *regAllocState) init(f *Func) {
 			// Note that for Flag_shared (position independent code)
 			// we do need to be careful, but that carefulness is hidden
 			// in the rewrite rules so we always have a free register
-			// available for global load/stores. See gen/386.rules (search for Flag_shared).
+			// available for global load/stores. See _gen/386.rules (search for Flag_shared).
 		case "amd64":
 			s.allocatable &^= 1 << 15 // R15
 		case "arm":
diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go
index 77ff4b100e..bf0135c2c8 100644
--- a/src/cmd/compile/internal/ssa/rewrite.go
+++ b/src/cmd/compile/internal/ssa/rewrite.go
@@ -1165,7 +1165,7 @@ func ccARM64Eval(op Op, flags *Value) int {
 }
 
 // logRule logs the use of the rule s. This will only be enabled if
-// rewrite rules were generated with the -log option, see gen/rulegen.go.
+// rewrite rules were generated with the -log option, see _gen/rulegen.go.
 func logRule(s string) {
 	if ruleFile == nil {
 		// Open a log file to write log to. We open in append
diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go
index 08d81451f5..0cacfe3834 100644
--- a/src/cmd/compile/internal/ssa/rewrite386.go
+++ b/src/cmd/compile/internal/ssa/rewrite386.go
@@ -1,5 +1,5 @@
-// Code generated from gen/386.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/386.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewrite386splitload.go b/src/cmd/compile/internal/ssa/rewrite386splitload.go
index 670e7f4f8f..ef3bf262b9 100644
--- a/src/cmd/compile/internal/ssa/rewrite386splitload.go
+++ b/src/cmd/compile/internal/ssa/rewrite386splitload.go
@@ -1,5 +1,5 @@
-// Code generated from gen/386splitload.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/386splitload.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index e8bbd954e2..cad37d4039 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/AMD64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/AMD64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go b/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go
index 685dd129a0..792cddd09e 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go
@@ -1,5 +1,5 @@
-// Code generated from gen/AMD64latelower.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/AMD64latelower.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64splitload.go b/src/cmd/compile/internal/ssa/rewriteAMD64splitload.go
index ae50aaa466..b443f1687e 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64splitload.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64splitload.go
@@ -1,5 +1,5 @@
-// Code generated from gen/AMD64splitload.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/AMD64splitload.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteARM.go b/src/cmd/compile/internal/ssa/rewriteARM.go
index 0aebdced40..8fa2a6af1d 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM.go
@@ -1,5 +1,5 @@
-// Code generated from gen/ARM.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/ARM.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go
index f8b6252d60..731ea980da 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM64.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/ARM64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/ARM64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteARM64latelower.go b/src/cmd/compile/internal/ssa/rewriteARM64latelower.go
index d4890fe080..49e154821d 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM64latelower.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64latelower.go
@@ -1,5 +1,5 @@
-// Code generated from gen/ARM64latelower.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/ARM64latelower.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteLOONG64.go b/src/cmd/compile/internal/ssa/rewriteLOONG64.go
index fbe49e5819..d57289e058 100644
--- a/src/cmd/compile/internal/ssa/rewriteLOONG64.go
+++ b/src/cmd/compile/internal/ssa/rewriteLOONG64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/LOONG64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/LOONG64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteMIPS.go b/src/cmd/compile/internal/ssa/rewriteMIPS.go
index 811ea9d9d3..1c8d90a07e 100644
--- a/src/cmd/compile/internal/ssa/rewriteMIPS.go
+++ b/src/cmd/compile/internal/ssa/rewriteMIPS.go
@@ -1,5 +1,5 @@
-// Code generated from gen/MIPS.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/MIPS.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteMIPS64.go b/src/cmd/compile/internal/ssa/rewriteMIPS64.go
index 1fbd556b5c..998b27dbb5 100644
--- a/src/cmd/compile/internal/ssa/rewriteMIPS64.go
+++ b/src/cmd/compile/internal/ssa/rewriteMIPS64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/MIPS64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/MIPS64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewritePPC64.go b/src/cmd/compile/internal/ssa/rewritePPC64.go
index 890e7423e1..d1bacf1bf4 100644
--- a/src/cmd/compile/internal/ssa/rewritePPC64.go
+++ b/src/cmd/compile/internal/ssa/rewritePPC64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/PPC64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/PPC64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteRISCV64.go b/src/cmd/compile/internal/ssa/rewriteRISCV64.go
index d362b668c8..f94e90f01a 100644
--- a/src/cmd/compile/internal/ssa/rewriteRISCV64.go
+++ b/src/cmd/compile/internal/ssa/rewriteRISCV64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/RISCV64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/RISCV64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteRISCV64latelower.go b/src/cmd/compile/internal/ssa/rewriteRISCV64latelower.go
index bde0164644..2cde073eec 100644
--- a/src/cmd/compile/internal/ssa/rewriteRISCV64latelower.go
+++ b/src/cmd/compile/internal/ssa/rewriteRISCV64latelower.go
@@ -1,5 +1,5 @@
-// Code generated from gen/RISCV64latelower.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/RISCV64latelower.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteS390X.go b/src/cmd/compile/internal/ssa/rewriteS390X.go
index 08bbd43759..db1747689d 100644
--- a/src/cmd/compile/internal/ssa/rewriteS390X.go
+++ b/src/cmd/compile/internal/ssa/rewriteS390X.go
@@ -1,5 +1,5 @@
-// Code generated from gen/S390X.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/S390X.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewriteWasm.go b/src/cmd/compile/internal/ssa/rewriteWasm.go
index defd40ddd1..5b7f4a8e45 100644
--- a/src/cmd/compile/internal/ssa/rewriteWasm.go
+++ b/src/cmd/compile/internal/ssa/rewriteWasm.go
@@ -1,5 +1,5 @@
-// Code generated from gen/Wasm.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/Wasm.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewritedec.go b/src/cmd/compile/internal/ssa/rewritedec.go
index 2a73a5ddc8..1b92fb8127 100644
--- a/src/cmd/compile/internal/ssa/rewritedec.go
+++ b/src/cmd/compile/internal/ssa/rewritedec.go
@@ -1,5 +1,5 @@
-// Code generated from gen/dec.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/dec.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewritedec64.go b/src/cmd/compile/internal/ssa/rewritedec64.go
index 848b0aa1e4..26036b2f0a 100644
--- a/src/cmd/compile/internal/ssa/rewritedec64.go
+++ b/src/cmd/compile/internal/ssa/rewritedec64.go
@@ -1,5 +1,5 @@
-// Code generated from gen/dec64.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/dec64.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go
index 2c6630c29d..de7f3e8bc7 100644
--- a/src/cmd/compile/internal/ssa/rewritegeneric.go
+++ b/src/cmd/compile/internal/ssa/rewritegeneric.go
@@ -1,5 +1,5 @@
-// Code generated from gen/generic.rules; DO NOT EDIT.
-// generated with: cd gen; go run *.go
+// Code generated from _gen/generic.rules; DO NOT EDIT.
+// generated with: cd _gen; go run .
 
 package ssa