From: Jakub Jelinek <jakub@gcc.gnu.org>
Date: Sat, 24 Jan 2009 21:36:09 +0000 (+0100)
Subject: re PR c/38957 (return of local variable pointer)
X-Git-Tag: releases/gcc-4.4.0~752
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=849421a3e44820ac554b6b1b625709fc0239f357;p=thirdparty%2Fgcc.git

re PR c/38957 (return of local variable pointer)

	PR c/38957
	* c-typeck.c (c_finish_return): Handle POINTER_PLUS_EXPR the same way
	as PLUS_EXPR.

	* gcc.dg/pr38957.c: New test.

From-SVN: r143654
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0c957db3b6a3..ecf9e4670418 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-01-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/38957
+	* c-typeck.c (c_finish_return): Handle POINTER_PLUS_EXPR the same way
+	as PLUS_EXPR.
+
 2009-01-24  Julian Brown  <julian@codesourcery.com>
 
 	* config/arm/t-linux-eabi (LIB2FUNCS_STATIC_EXTRA): Add
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 35c8d2328783..4b9b2b30d00c 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -7226,8 +7226,10 @@ c_finish_return (tree retval)
 	{
 	  switch (TREE_CODE (inner))
 	    {
-	    CASE_CONVERT:   case NON_LVALUE_EXPR:
+	    CASE_CONVERT:
+	    case NON_LVALUE_EXPR:
 	    case PLUS_EXPR:
+	    case POINTER_PLUS_EXPR:
 	      inner = TREE_OPERAND (inner, 0);
 	      continue;
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7e40d4e49585..5425b0250da7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,8 +1,13 @@
-2009-01-24 David Billinghurst (billingd@gcc.gnu.org)
+2009-01-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/38957
+	* gcc.dg/pr38957.c: New test.
+
+2009-01-24  David Billinghurst  <billingd@gcc.gnu.org>
 
 	PR fortran/38955
 	* gfortran.dg/array_constructor_24.f: Allow tolerance when
-	comparing floats
+	comparing floats.
 
 2009-01-24  Sebastian Pop  <sebastian.pop@amd.com>
 
diff --git a/gcc/testsuite/gcc.dg/pr38957.c b/gcc/testsuite/gcc.dg/pr38957.c
new file mode 100644
index 000000000000..f94cd7627b4a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr38957.c
@@ -0,0 +1,16 @@
+/* PR c/38957 */
+/* { dg-do compile } */
+
+char *
+foo (void)
+{
+  char a[2];
+  return a+1;	/* { dg-warning "returns address of local variable" } */
+}
+
+char *
+bar (void)
+{
+  char a[2];
+  return a;	/* { dg-warning "returns address of local variable" } */
+}