[gcc r12-7202] match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499]

[gcc r12-7202] match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499]

[Jakub Jelinek]

https://gcc.gnu.org/g:9355a8c35883b5125851bb9b4169a1a1cd8e343f

commit r12-7202-g9355a8c35883b5125851bb9b4169a1a1cd8e343f
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Feb 11 20:27:23 2022 +0100

    match.pd: Fix up (X & Y) CMP 0 -> X CMP2 ~Y simplifications [PR104499]
    
    The following testcase ICEs on x86_64-linux, because match.pd emits
    there a NOP_EXPR cast from int*8 vector type with BLKmode to
    unsigned*8 vector type with BLKmode and vec-lowering isn't prepared
    to handle such casts.
    
    Fixed by using VIEW_CONVERT_EXPR instead.
    
    2022-02-11  Jakub Jelinek  <jakub@redhat.com>
    
            PR tree-optimization/104499
            * match.pd ((X & Y) CMP 0 -> X CMP2 ~Y): Use view_convert instead
            of convert.
    
            * gcc.c-torture/compile/pr104499.c: New test.

Diff:
---
 gcc/match.pd                                   |  2 +-
 gcc/testsuite/gcc.c-torture/compile/pr104499.c | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/match.pd b/gcc/match.pd
index 0f326233cbb..10f62284862 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -5778,7 +5778,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
       (if (TYPE_UNSIGNED (TREE_TYPE (@1)))
        (icmp @0 { csts; })
        (with { tree utype = unsigned_type_for (TREE_TYPE (@1)); }
-	 (icmp (convert:utype @0) { csts; }))))))))
+	 (icmp (view_convert:utype @0) { csts; }))))))))
 
 /* When one argument is a constant, overflow detection can be simplified.
    Currently restricted to single use so as not to interfere too much with
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr104499.c b/gcc/testsuite/gcc.c-torture/compile/pr104499.c
new file mode 100644
index 00000000000..e5d5cddc81c
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr104499.c
@@ -0,0 +1,11 @@
+/* PR tree-optimization/104499 */
+
+typedef int __attribute__((__vector_size__ (8 * sizeof (int)))) V;
+
+V v;
+
+void
+foo (void)
+{
+  v = ((1 | v) != 1);
+}