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re PR middle-end/54515 (cc1plus sigsegv -O2 anonymous namespace) 

2012-09-07  Markus Trippelsdorf  <markus@trippelsdorf.de>

	PR middle-end/54515
	* tree-sra.c (disqualify_base_of_expr): Check for possible
	NULL_TREE returned by get_base_address()

	* g++.dg/tree-ssa/pr54515.C: new testcase

From-SVN: r191130
This commit is contained in:
Markus Trippelsdorf 2012-09-10 09:48:28 +00:00 committed by Richard Biener
parent 2fd7c76554
commit 5b5995bdec
4 changed files with 32 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-09-10 Markus Trippelsdorf <markus@trippelsdorf.de>
PR middle-end/54515
* tree-sra.c (disqualify_base_of_expr): Check for possible
NULL_TREE returned by get_base_address()
2012-09-07 Richard Guenther <rguenther@suse.de>
Backport from mainline

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-09-10 Markus Trippelsdorf <markus@trippelsdorf.de>
PR middle-end/54515
* g++.dg/tree-ssa/pr54515.C: new testcase
2012-09-08 Mikael Morin <mikael@gcc.gnu.org>
PR fortran/54208

19
gcc/testsuite/g++.dg/tree-ssa/pr54515.C Normal file
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@ -0,0 +1,19 @@
// { dg-do compile }
// { dg-options "-O2" }
template < typename T > T h2le (T)
{
T a;
unsigned short &b = a;
short c = 0;
unsigned char (&d)[2] = reinterpret_cast < unsigned char (&)[2] > (c);
unsigned char (&e)[2] = reinterpret_cast < unsigned char (&)[2] > (b);
e[0] = d[0];
return a;
}
void
bar ()
{
h2le ((unsigned short) 0);
}

3
gcc/tree-sra.c
View File

@ -971,7 +971,8 @@ static void
disqualify_base_of_expr (tree t, const char *reason)
{
t = get_base_address (t);
if (sra_mode == SRA_MODE_EARLY_IPA
if (t
&& sra_mode == SRA_MODE_EARLY_IPA
&& TREE_CODE (t) == MEM_REF)
t = get_ssa_base_param (TREE_OPERAND (t, 0));