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* [gcc r12-1922] aix: align text CSECTs to at least 32 bytes.
@ 2021-06-30 0:41 David Edelsohn
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From: David Edelsohn @ 2021-06-30 0:41 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:652abe22205f268c90b3b15f28c56c030ef68a34
commit r12-1922-g652abe22205f268c90b3b15f28c56c030ef68a34
Author: David Edelsohn <dje.gcc@gmail.com>
Date: Tue May 11 21:07:19 2021 -0400
aix: align text CSECTs to at least 32 bytes.
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_xcoff_section_type_flags):
Increase code CSECT alignment to at least 32 bytes.
* config/rs6000/xcoff.h (TEXT_SECTION_ASM_OP): Add 32 byte
alignment designation.
Diff:
---
gcc/config/rs6000/rs6000.c | 6 +++++-
gcc/config/rs6000/xcoff.h | 3 ++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 2c249e186e1..075c156ae13 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
/* Subroutines used for code generation on IBM RS/6000.
Copyright (C) 1991-2021 Free Software Foundation, Inc.
Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
@@ -21361,8 +21362,11 @@ rs6000_xcoff_section_type_flags (tree decl, const char *name, int reloc)
flags |= SECTION_BSS;
/* Align to at least UNIT size. */
- if ((flags & SECTION_CODE) != 0 || !decl || !DECL_P (decl))
+ if (!decl || !DECL_P (decl))
align = MIN_UNITS_PER_WORD;
+ /* Align code CSECT to at least 32 bytes. */
+ else if ((flags & SECTION_CODE) != 0)
+ align = MAX ((DECL_ALIGN (decl) / BITS_PER_UNIT), 32);
else
/* Increase alignment of large objects if not already stricter. */
align = MAX ((DECL_ALIGN (decl) / BITS_PER_UNIT),
diff --git a/gcc/config/rs6000/xcoff.h b/gcc/config/rs6000/xcoff.h
index 5ba565f63bb..f3546fadf33 100644
--- a/gcc/config/rs6000/xcoff.h
+++ b/gcc/config/rs6000/xcoff.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
/* Definitions of target machine for GNU compiler,
for some generic XCOFF file format
Copyright (C) 2001-2021 Free Software Foundation, Inc.
@@ -249,7 +250,7 @@
#define DOUBLE_INT_ASM_OP "\t.llong\t"
/* Output before instructions. */
-#define TEXT_SECTION_ASM_OP "\t.csect .text[PR]"
+#define TEXT_SECTION_ASM_OP "\t.csect .text[PR],5"
/* Output before writable data. */
#define DATA_SECTION_ASM_OP \
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