[release-branch.go1.20] cmd/compile: disable inline static init optimization

There are a plenty of regression in 1.20 with this optimization. This CL
disable inline static init, so it's safer to backport to 1.20 branch.

The optimization will be enabled again during 1.21 cycle.

Fixes #58444

Change-Id: If5916008597b46146b4dc7108c6b389d53f35e95
Reviewed-on: https://go-review.googlesource.com/c/go/+/467015
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/467035
Run-TryBot: Matthew Dempsky <mdempsky@google.com>

src/cmd/compile/internal/base/flag.go

@@ -167,7 +167,7 @@ func ParseFlags() {
 
 	Debug.ConcurrentOk = true
 	Debug.InlFuncsWithClosures = 1
-	Debug.InlStaticInit = 1
+	Debug.InlStaticInit = 0
 	if buildcfg.Experiment.Unified {
 		Debug.Unified = 1
 	}

test/fixedbugs/issue56778.go

@@ -1,4 +1,4 @@
-// compiledir
+// compiledir -d=inlstaticinit=1
 
 // Copyright 2022 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/inline.go

@@ -1,4 +1,4 @@
-// errorcheckwithauto -0 -m -d=inlfuncswithclosures=1
+// errorcheckwithauto -0 -m -d=inlfuncswithclosures=1 -d=inlstaticinit=1
 
 // Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/noinit.go

@@ -1,4 +1,4 @@
-// run
+// run -gcflags=-d=inlstaticinit=1
 //go:build !gcflags_noopt
 
 // Copyright 2010 The Go Authors. All rights reserved.