From 8264e6c39c497349881ee2259451f8ba9f1b8cd9 Mon Sep 17 00:00:00 2001
From: Georg-Johann Lay <avr@gjlay.de>
Date: Wed, 19 Apr 2017 12:20:57 +0000
Subject: [PATCH] re PR target/80462 ([avr] Incorrect "warning: uninitialized
variable 'xxx' put into program memory area" for identical strings)
PR target/80462
* config/avr/avr.c (tree.h): Include it.
(cgraph.h): Include it.
(avr_encode_section_info): Don't warn for uninitialized progmem
variable if it's just an alias.
From-SVN: r246997
---
gcc/ChangeLog | 8 ++++++++
gcc/config/avr/avr.c | 13 ++++++++++---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 85025d4a402c..1995cd536b0a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2017-04-19 Georg-Johann Lay <avr@gjlay.de>
+
+ PR target/80462
+ * config/avr/avr.c (tree.h): Include it.
+ (cgraph.h): Include it.
+ (avr_encode_section_info): Don't warn for uninitialized progmem
+ variable if it's just an alias.
+
2017-04-19 Richard Biener <rguenther@suse.de>
PR ipa/65972
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c
index dde712c49c7f..648a1256f803 100644
--- a/gcc/config/avr/avr.c
+++ b/gcc/config/avr/avr.c
@@ -25,6 +25,8 @@
#include "backend.h"
#include "target.h"
#include "rtl.h"
+#include "tree.h"
+#include "cgraph.h"
#include "c-family/c-common.h"
#include "cfghooks.h"
#include "df.h"
@@ -10127,9 +10129,14 @@ avr_encode_section_info (tree decl, rtx rtl, int new_decl_p)
&& !DECL_EXTERNAL (decl)
&& avr_progmem_p (decl, DECL_ATTRIBUTES (decl)))
{
- warning (OPT_Wuninitialized,
- "uninitialized variable %q+D put into "
- "program memory area", decl);
+ // Don't warn for (implicit) aliases like in PR80462.
+ tree asmname = DECL_ASSEMBLER_NAME (decl);
+ varpool_node *node = varpool_node::get_for_asmname (asmname);
+ bool alias_p = node && node->alias;
+
+ if (!alias_p)
+ warning (OPT_Wuninitialized, "uninitialized variable %q+D put into "
+ "program memory area", decl);
}
default_encode_section_info (decl, rtl, new_decl_p);
--
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