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re PR tree-optimization/42916 ("-fcompare-debug failure" with "-O1 -funroll-loops -ftree-vectorize") 

2010-02-19  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/42916
	* tree-vect-slp.c (vect_slp_analyze_bb): Count only real
	instructions.

	* gcc.dg/pr42916.c: New testcase.

From-SVN: r156898
This commit is contained in:
Richard Guenther 2010-02-19 15:42:31 +00:00 committed by Richard Biener
parent e5dfb95fd7
commit c7da035453
4 changed files with 38 additions and 1 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2010-02-19 Richard Guenther <rguenther@suse.de>
PR tree-optimization/42916
* tree-vect-slp.c (vect_slp_analyze_bb): Count only real
instructions.
2010-02-19 Andreas Schwab <schwab@linux-m68k.org>
* configure.ac: Replace all uses of changequote in macro arguments

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-02-19 Richard Guenther <rguenther@suse.de>
PR tree-optimization/42916
* gcc.dg/pr42916.c: New testcase.
2010-02-18 Jason Merrill <jason@redhat.com>
PR c++/42837

20
gcc/testsuite/gcc.dg/pr42916.c Normal file
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@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-O1 -funroll-loops -ftree-vectorize -fcompare-debug" } */
int seed;
static inline int hash(const char *str)
{
int h = seed++;
int i = 12;
while (i--)
h += (h << 3) ^ *str++;
return h;
}
void f(const char *str, int *h)
{
int i = 6;
while (i--)
*h++ = hash(str);
}

8
gcc/tree-vect-slp.c
View File

@ -1273,7 +1273,13 @@ vect_slp_analyze_bb (basic_block bb)
fprintf (vect_dump, "===vect_slp_analyze_bb===\n");
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
insns++;
{
gimple stmt = gsi_stmt (gsi);
if (!is_gimple_debug (stmt)
&& !gimple_nop_p (stmt)
&& !gimple_code (stmt) == GIMPLE_LABEL)
insns++;
}
if (insns > PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB))
{