From: David Edelsohn <dje.gcc@gmail.com>
Date: Thu, 26 Aug 2021 21:14:18 +0000 (-0400)
Subject: aix: packed struct alignment [PR102068]
X-Git-Tag: basepoints/gcc-13~5135
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5faf7120398c9bf290758891a975da1f727d631a;p=thirdparty%2Fgcc.git

aix: packed struct alignment [PR102068]

Further fixes to structure alignment when the structure is packed
and contains double.  This patch checks for packed attribute
at the top level.

gcc/ChangeLog:

	PR target/102068
	* config/rs6000/rs6000.c (rs6000_adjust_field_align): Use
	computed alignment if the entire struct has attribute packed.
---

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index e073b26b4307..05fb6aad4b07 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -7955,7 +7955,7 @@ rs6000_slow_unaligned_access (machine_mode mode, unsigned int align)
 unsigned int
 rs6000_special_adjust_field_align (tree type, unsigned int computed)
 {
-  if (computed <= 32)
+  if (computed <= 32 || TYPE_PACKED (type))
     return computed;
 
   /* Strip initial arrays.  */