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* [gcc r11-3283] testsuite: add another test for the rotate vectorization miscompilation
@ 2020-09-18 13:07 Jakub Jelinek
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From: Jakub Jelinek @ 2020-09-18 13:07 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:3d3fe967b0961cb59f5df03ae2a55d83dc4bbd34
commit r11-3283-g3d3fe967b0961cb59f5df03ae2a55d83dc4bbd34
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri Sep 18 15:05:53 2020 +0200
testsuite: add another test for the rotate vectorization miscompilation
This time with short and char where the used mask used to be larger
than it should have been.
2020-09-18 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/97081
* gcc.dg/vect/pr97081-2.c: New test.
Diff:
---
gcc/testsuite/gcc.dg/vect/pr97081-2.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/gcc/testsuite/gcc.dg/vect/pr97081-2.c b/gcc/testsuite/gcc.dg/vect/pr97081-2.c
new file mode 100644
index 00000000000..98ad3c3fe17
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr97081-2.c
@@ -0,0 +1,32 @@
+/* PR tree-optimization/97081 */
+
+#include "tree-vect.h"
+
+unsigned short s[1024];
+unsigned char c[1024];
+
+__attribute__((noipa)) void
+foo (int n)
+{
+ for (int i = 0; i < 1024; i++)
+ s[i] = (s[i] << n) | (s[i] >> (__SIZEOF_SHORT__ * __CHAR_BIT__ - n));
+ for (int i = 0; i < 1024; i++)
+ c[i] = (c[i] << n) | (c[i] >> (__CHAR_BIT__ - n));
+}
+
+int
+main ()
+{
+ check_vect ();
+ for (int i = 0; i < 1024; i++)
+ {
+ s[i] = i;
+ c[i] = i;
+ }
+ foo (3);
+ for (int i = 0; i < 1024; i++)
+ if (s[i] != (unsigned short) ((i << 3) | (i >> (__SIZEOF_SHORT__ * __CHAR_BIT__ - 3)))
+ || c[i] != (unsigned char) ((((unsigned char) i) << 3) | (((unsigned char) i) >> (__CHAR_BIT__ - 3))))
+ __builtin_abort ();
+ return 0;
+}
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