From: Andreas Krebbel <krebbel@linux.ibm.com>
Date: Thu, 16 Jan 2020 09:41:44 +0000 (+0100)
Subject: Work around array out of bounds warning in mkdeps
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3b5757ea87ad2274b841340335bf7536204e615b;p=gcc.git

Work around array out of bounds warning in mkdeps

This suppresses an array out of bounds warning in mkdeps.c as proposed
by Martin Sebor in the bugzilla.

array subscript 2 is outside array bounds of ‘const char [2]’

Since this warning does occur during bootstrap it currently breaks
werror builds on IBM Z.

The problem can be reproduced also on x86_64 by changing the inlining
threshold using: --param max-inline-insns-auto=80

Bootstrapped and regression tested on x86_64 and IBM Z.

libcpp/ChangeLog:

2020-01-16  Andreas Krebbel  <krebbel@linux.ibm.com>

	PR tree-optimization/92176
	* mkdeps.c (deps_add_default_target): Avoid calling apply_vpath to
	suppress an array out of bounds warning.
---

diff --git a/libcpp/mkdeps.c b/libcpp/mkdeps.c
index 6b2575a2709..09a111fcdd5 100644
--- a/libcpp/mkdeps.c
+++ b/libcpp/mkdeps.c
@@ -268,7 +268,7 @@ deps_add_default_target (class mkdeps *d, const char *tgt)
     return;
 
   if (tgt[0] == '\0')
-    deps_add_target (d, "-", 1);
+    d->targets.push (xstrdup ("-"));
   else
     {
 #ifndef TARGET_OBJECT_SUFFIX