Module Name:    src
Committed By:   rin
Date:           Mon Sep 12 08:11:51 UTC 2022

Modified Files:
        src/doc: HACKS

Log Message:
Document -O0 hack for ibm4xx copy{in,out}() for clang 13.0.0.


To generate a diff of this commit:
cvs rdiff -u -r1.230 -r1.231 src/doc/HACKS

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/doc/HACKS
diff -u src/doc/HACKS:1.230 src/doc/HACKS:1.231
--- src/doc/HACKS:1.230	Wed Aug 10 13:38:26 2022
+++ src/doc/HACKS	Mon Sep 12 08:11:51 2022
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.230 2022/08/10 13:38:26 rin Exp $
+# $NetBSD: HACKS,v 1.231 2022/09/12 08:11:51 rin Exp $
 #
 # This file is intended to document workarounds for currently unsolved
 # (mostly) compiler bugs.
@@ -1054,3 +1054,13 @@ descr
 
 	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105209
 kcah
+
+hack	compile copy{in,out}() for ibm4xx with -O0 for clang
+cdate	Mon Sep 12 08:06:36 UTC 2022
+who	rin
+port	evbppc
+file	sys/arch/powerpc/ibm4xx/trap.c: 1.99
+descr
+	clang 13.0.0 miscompiles copy{in,out}() with -O[12]. As a result,
+	kernel cannot execute /sbin/init.
+kcah

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