From: David du Colombier <0intro@gmail.com>
Date: Mon, 20 May 2024 17:00:09 +0000 (+0200)
Subject: cmd/compile: disable AlignHot on plan9/386
X-Git-Tag: go1.23rc1~260
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=1cb13ac7f6ece4374056555c2c3b7802ba2de28d;p=gostls13.git

cmd/compile: disable AlignHot on plan9/386

CL 577935 enabled hot block alignment on 386
and amd64 architecture.

However, this change broke the plan9/386 build.

This change disables  AlignHot on plan9/386.

Updates #67502.

Change-Id: If73b066824c7218a9408c6e8f06aec5908b7a64f
Reviewed-on: https://go-review.googlesource.com/c/go/+/586835
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
---

diff --git a/src/cmd/compile/internal/base/flag.go b/src/cmd/compile/internal/base/flag.go
index fe515aafbf..8c17c5f27d 100644
--- a/src/cmd/compile/internal/base/flag.go
+++ b/src/cmd/compile/internal/base/flag.go
@@ -363,6 +363,11 @@ func ParseFlags() {
 
 	// set via a -d flag
 	Ctxt.Debugpcln = Debug.PCTab
+
+	// https://golang.org/issue/67502
+	if buildcfg.GOOS == "plan9" && buildcfg.GOARCH == "386" {
+		Debug.AlignHot = 0
+	}
 }
 
 // registerFlags adds flag registrations for all the fields in Flag.