From: Pan Li <pan2.li@intel.com>
Date: Fri, 19 May 2023 23:49:00 +0000 (+0800)
Subject: Mode-Switching: Fix local array maybe uninitialized warning
X-Git-Tag: basepoints/gcc-15~9122
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=65c7725eecb868f4b5fa7d7de72ea428e2ba61a1;p=thirdparty%2Fgcc.git

Mode-Switching: Fix local array maybe uninitialized warning

There are 2 local array in function optimize_mode_switching. It will be
initialized conditionally at the beginning but then always consumed in
another loop. It may trigger the warning maybe-uninitialized, and may
result in build failure when enable werror, aka warning as error.

This patch will initialize the local array to zero explictly when
declaration.

Signed-off-by: Pan Li <pan2.li@intel.com>

gcc/ChangeLog:

	* mode-switching.cc (entity_map): Initialize the array to zero.
	(bb_info): Ditto.
---

diff --git a/gcc/mode-switching.cc b/gcc/mode-switching.cc
index 2d2818f5674d..64ae2bc29c30 100644
--- a/gcc/mode-switching.cc
+++ b/gcc/mode-switching.cc
@@ -499,8 +499,8 @@ optimize_mode_switching (void)
   bool need_commit = false;
   static const int num_modes[] = NUM_MODES_FOR_MODE_SWITCHING;
 #define N_ENTITIES ARRAY_SIZE (num_modes)
-  int entity_map[N_ENTITIES];
-  struct bb_info *bb_info[N_ENTITIES];
+  int entity_map[N_ENTITIES] = {};
+  struct bb_info *bb_info[N_ENTITIES] = {};
   int i, j;
   int n_entities = 0;
   int max_num_modes = 0;