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re PR rtl-optimization/52092 (ICE: internal consistency failure)

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PR rtl-optimization/52092
	* loop-unswitch.c (unswitch_single_loop): Call copy_rtx_if_shared
	on get_iv_value result.

	* gcc.c-torture/compile/pr52092.c: New test.

Co-Authored-By: Zdenek Dvorak <ook@ucw.cz>

From-SVN: r183869
This commit is contained in:
Jakub Jelinek 2012-02-03 12:55:29 +01:00 committed by Jakub Jelinek
parent 5b5b0fa908
commit 32410d02e0
4 changed files with 39 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-02-03 Jakub Jelinek <jakub@redhat.com>
Zdenek Dvorak <ook@ucw.cz>
PR rtl-optimization/52092
* loop-unswitch.c (unswitch_single_loop): Call copy_rtx_if_shared
on get_iv_value result.
2012-02-02 Andrew Pinski <apinski@cavium.com>
PR middle-end/47982

4
gcc/loop-unswitch.c
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@ -1,5 +1,5 @@
/* Loop unswitching for GNU compiler.
Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2012
Free Software Foundation, Inc.
This file is part of GCC.
@ -367,7 +367,7 @@ unswitch_single_loop (struct loop *loop, rtx cond_checked, int num)
fprintf (dump_file, ";; Unswitching loop\n");
/* Unswitch the loop on this condition. */
nloop = unswitch_loop (loop, bbs[i], cond, cinsn);
nloop = unswitch_loop (loop, bbs[i], copy_rtx_if_shared (cond), cinsn);
gcc_assert (nloop);
/* Invoke itself on modified loops. */

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-02-03 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/52092
* gcc.c-torture/compile/pr52092.c: New test.
2012-02-02 Mikael Morin <mikael@gcc.gnu.org>
PR fortran/41587

25
gcc/testsuite/gcc.c-torture/compile/pr52092.c Normal file
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@ -0,0 +1,25 @@
/* PR rtl-optimization/52092 */
int a, b, c, d, e, f, g;
void
foo (void)
{
for (;;)
{
int *h = 0;
int i = 3;
int **j = &h;
if (e)
{
c = d || a;
g = c ? a : b;
if ((char) (i * g))
{
h = &f;
*h = 0;
}
**j = 0;
}
}
}