[gcc r11-9724] s390: Fix up *cmp_and_trap_unsigned_int<mode> constraints [PR104775]

[gcc r11-9724] s390: Fix up *cmp_and_trap_unsigned_int<mode> constraints [PR104775]

[Jakub Jelinek]

https://gcc.gnu.org/g:2ef4d28e59e3117dd1457e9ad08b7e1b48ab9830

commit r11-9724-g2ef4d28e59e3117dd1457e9ad08b7e1b48ab9830
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Mar 7 11:14:04 2022 +0100

    s390: Fix up *cmp_and_trap_unsigned_int<mode> constraints [PR104775]
    
    The following testcase fails to assemble due to clgte %r6,0(%r1,%r10)
    insn not being accepted by assembler.
    My rough understanding is that in the RSY-b insn format the spot
    in other formats used for index registers is used instead for M3 what
    kind of comparison it is, so this patch follows what other similar
    instructions use for constraint (i.e. one without index register).
    
    2022-03-07  Jakub Jelinek  <jakub@redhat.com>
    
            PR target/104775
            * config/s390/s390.md (*cmp_and_trap_unsigned_int<mode>): Use
            S constraint instead of T in the last alternative.
    
            * gcc.target/s390/pr104775.c: New test.
    
    (cherry picked from commit 2472dcaa8cb9e02e902f83d419c3ee7e0f3d9041)

Diff:
---
 gcc/config/s390/s390.md                  |  2 +-
 gcc/testsuite/gcc.target/s390/pr104775.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md
index 97a306768a5..5f817c52437 100644
--- a/gcc/config/s390/s390.md
+++ b/gcc/config/s390/s390.md
@@ -9587,7 +9587,7 @@
 (define_insn "*cmp_and_trap_unsigned_int<mode>"
   [(trap_if (match_operator 0 "s390_unsigned_integer_comparison"
 	       [(match_operand:GPR 1 "register_operand" "d,d,d")
-		(match_operand:GPR 2 "general_operand"  "d,D,T")])
+		(match_operand:GPR 2 "general_operand"  "d,D,S")])
 	    (const_int 0))]
   "TARGET_Z10"
   "@
diff --git a/gcc/testsuite/gcc.target/s390/pr104775.c b/gcc/testsuite/gcc.target/s390/pr104775.c
new file mode 100644
index 00000000000..fd4258bb36f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/pr104775.c
@@ -0,0 +1,14 @@
+/* PR target/104775 */
+/* { dg-do assemble { target s390_zEC12_hw } } */
+/* { dg-options "-O2 -march=zEC12" } */
+
+long a[64];
+void bar (void);
+
+void
+foo (int x, int y)
+{
+  if (x != a[y])
+    bar ();
+  __builtin_trap ();
+}