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[patch] Fix PR tree-optimization/46663
- From: Ira Rosen <IRAR at il dot ibm dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Wed, 1 Dec 2010 12:13:05 +0200
- Subject: [patch] Fix PR tree-optimization/46663
Hi,
This patch adds a check that FUNCTION_DECL exists for the call in
vectorizer power pattern recognition.
I am testing the patch for trunk on x86_64-suse-linux now.
The problem goes back to 4.0, how far back should I backport this fix?
Thanks,
Ira
ChangeLog:
PR tree-optimization/46663
* tree-vect-patterns.c (vect_recog_pow_pattern): Check that
FUNCTION_DECL exists.
testsuite/ChangeLog:
PR tree-optimization/46663
* gcc.dg/vect/pr46663.c: New test.
Index: testsuite/gcc.dg/vect/pr46663.c
===================================================================
--- testsuite/gcc.dg/vect/pr46663.c (revision 0)
+++ testsuite/gcc.dg/vect/pr46663.c (revision 0)
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O -ftree-vectorize -fdump-tree-vect-details
-fexceptions" } */
+
+typedef __attribute__ ((const)) int (*bart) (void);
+
+int foo (bart bar, int m)
+{
+ int i, j = 0;
+ for (i = 0; i < m; i++)
+ j += bar();
+ return j;
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
Index: tree-vect-patterns.c
===================================================================
--- tree-vect-patterns.c (revision 167324)
+++ tree-vect-patterns.c (working copy)
@@ -472,6 +472,9 @@ vect_recog_pow_pattern (gimple last_stmt
return NULL;
fn = gimple_call_fndecl (last_stmt);
+ if (fn == NULL_TREE)
+ return NULL;
+
switch (DECL_FUNCTION_CODE (fn))
{
case BUILT_IN_POWIF: