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[dev.regabi] cmd/compile: separate nowritebarrierrec from main

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Main knows a bit too much about nowritebarrierrec.
Abstract the API a little bit to make the package split easier.

Change-Id: I4b76bdb1fed73dfb0d44e1a6c86de8c2d29a9488
Reviewed-on: https://go-review.googlesource.com/c/go/+/279301
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Russ Cox 2020-12-21 01:56:46 -05:00
parent e999c17022
commit 1a523c8ab0
2 changed files with 16 additions and 9 deletions
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13
src/cmd/compile/internal/gc/dcl.go
View file

@ -15,7 +15,18 @@ import (
"strings"
)
// Declaration stack & operations
func EnableNoWriteBarrierRecCheck() {
nowritebarrierrecCheck = newNowritebarrierrecChecker()
}
func NoWriteBarrierRecCheck() {
// Write barriers are now known. Check the
// call graph.
nowritebarrierrecCheck.check()
nowritebarrierrecCheck = nil
}
var nowritebarrierrecCheck *nowritebarrierrecChecker
func testdclstack() {
if !types.IsDclstackValid() {

12
src/cmd/compile/internal/gc/main.go
View file

@ -57,8 +57,6 @@ var Target *ir.Package
// timing data for compiler phases
var timings Timings
var nowritebarrierrecCheck *nowritebarrierrecChecker
// Main parses flags and Go source files specified in the command-line
// arguments, type-checks the parsed Go package, compiles functions to machine
// code, and finally writes the compiled package definition to disk.
@ -382,7 +380,7 @@ func Main(archInit func(*Arch)) {
// We'll do the final check after write barriers are
// inserted.
if base.Flag.CompilingRuntime {
nowritebarrierrecCheck = newNowritebarrierrecChecker()
EnableNoWriteBarrierRecCheck()
}
// Phase 7: Transform closure bodies to properly reference captured variables.
@ -422,11 +420,9 @@ func Main(archInit func(*Arch)) {
compileFunctions()
if nowritebarrierrecCheck != nil {
// Write barriers are now known. Check the
// call graph.
nowritebarrierrecCheck.check()
nowritebarrierrecCheck = nil
if base.Flag.CompilingRuntime {
// Write barriers are now known. Check the call graph.
NoWriteBarrierRecCheck()
}
// Finalize DWARF inline routine DIEs, then explicitly turn off