[PATCH] RISC-V: Revive test case PR 102957

[Tsukasa OI <research_trasio@irq.a4lg.com>]

From: Tsukasa OI <research_trasio@irq.a4lg.com>

Commit c283c4774d1c ("RISC-V: Throw compilation error for unknown
extensions") changed how do we handle unknown extensions and
commit 6f709f79c915a ("[committed] [RISC-V] Fix expected diagnostic messages
in testsuite") "fixed" test failures caused by that change (on pr102957.c,
by testing the error message after the first change).

However, the latter change will break the original intent of PR 102957 test
case because we wanted to make sure that we can parse a valid two-letter
extension name.

Fortunately, there is a valid two-letter extension name, 'Zk' (standard
scalar cryptography extension superset with NIST algorithm suite).

This commit puts this extension name and revives the intent of the test case
for PR 102957.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/pr102957.c: Remove "dg-error" because we don't
	need to test for error message.  Use the 'Zk' extension to continue
	testing whether we can use valid two-letter extensions.
---
 gcc/testsuite/gcc.target/riscv/pr102957.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.target/riscv/pr102957.c b/gcc/testsuite/gcc.target/riscv/pr102957.c
index 5273ee6c5018..fe6241466354 100644
--- a/gcc/testsuite/gcc.target/riscv/pr102957.c
+++ b/gcc/testsuite/gcc.target/riscv/pr102957.c
@@ -1,7 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-march=rv64gzb -mabi=lp64" } */
+/* { dg-options "-march=rv64gzk -mabi=lp64" } */
 int foo()
 {
 }
-
-/* { dg-error "extension 'zb' starts with 'z' but is unsupported standard extension" "" { target *-*-* } 0 } */

base-commit: bcda361daaec8623c91d0dff3ea8e576373b5f50
-- 
2.41.0