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scratch/igc 10dde7db299: Avoid compiler warning in igc.c
From: |
Eli Zaretskii |
Subject: |
scratch/igc 10dde7db299: Avoid compiler warning in igc.c |
Date: |
Fri, 26 Apr 2024 03:25:15 -0400 (EDT) |
branch: scratch/igc
commit 10dde7db299f2a23f7658b0ef53b3d03752cafe7
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>
Avoid compiler warning in igc.c
* src/igc.c (fix_weak_ref): Avoid compiler warning about
dereferencing type-punned pointer, which breaks strict-aliasing
rules.
---
src/igc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/igc.c b/src/igc.c
index c2dd837a455..89a2ac3d9a7 100644
--- a/src/igc.c
+++ b/src/igc.c
@@ -1034,7 +1034,9 @@ fix_weak_ref (mps_ss_t ss, struct Lisp_Weak_Ref *wref)
{
MPS_SCAN_BEGIN (ss)
{
- const mps_word_t tagged_word = *(mps_word_t *)&wref->ref;
+ /* FIXME: The below explicitly assumes Lisp_Object is of the same
+ width as mps_word_t! */
+ const mps_word_t tagged_word = (ptrdiff_t) igc_weak_ref_deref (wref);
const enum Lisp_Type tag = tagged_word & IGC_TAG_MASK;
switch (tag)
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