[PATCH] Compile gcc.target/i386/pr78904-4a.c with -mtune=generic

[H.J. Lu via Gcc-patches]

commit e95395926a84a2406faefe0995295d199d595440
Author: Uros Bizjak <ubiz...@gmail.com>
Date:   Thu Jun 18 20:12:48 2020 +0200

    i386: Fix mode of ZERO_EXTRACT RTXes, remove ext_register_operand predicate.

caused

FAIL: gcc.target/i386/pr78904-4a.c scan-assembler [ \t]movb[\t ]+%.h, t

when compiled with --target_board='unix{-m32\ -march=cascadelake}'.  With
-mtune=generic:

        movzwl  4(%esp), %edx
        movl    8(%esp), %eax
        movb    %dh, t(%eax)
        ret

With -mtune=cascadelake:

        movzbl  5(%esp), %edx
        movl    8(%esp), %eax
        movb    %dl, t(%eax)
        ret

Add -mtune=generic for --target_board='unix{-m32\ -march=cascadelake}'.
---
 gcc/testsuite/gcc.target/i386/pr78904-4a.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/i386/pr78904-4a.c 
b/gcc/testsuite/gcc.target/i386/pr78904-4a.c
index 5e6159a7648..6a100c01667 100644
--- a/gcc/testsuite/gcc.target/i386/pr78904-4a.c
+++ b/gcc/testsuite/gcc.target/i386/pr78904-4a.c
@@ -1,7 +1,7 @@
 /* PR target/78904 */
 /* { dg-do compile } */
 /* { dg-require-effective-target nonpic } */
-/* { dg-options "-O2 -masm=att" } */
+/* { dg-options "-O2 -masm=att -mtune=generic" } */
 
 typedef __SIZE_TYPE__ size_t;
 
-- 
2.26.2