[llvm] [RISC-V] Avoid using an allocated extension name in invalid-attributes.s (PR #177094)

[Alexander Richardson via llvm-commits]

https://github.com/arichardson created https://github.com/llvm/llvm-project/pull/177094

The Y extension has been allocated and will no longer trigger an error
once https://github.com/llvm/llvm-project/pull/176870 lands. Use 't' to
test this case instead which is still marked as reserved and as far as I
know is not currently reserved for any future extensions.


>From b138fca6a3f4c2dbc73989ebdfb579e52971ad30 Mon Sep 17 00:00:00 2001
From: Alex Richardson <alexrichardson at google.com>
Date: Tue, 20 Jan 2026 21:48:29 -0800
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.8-beta.1
---
 llvm/test/MC/RISCV/invalid-attribute.s | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/llvm/test/MC/RISCV/invalid-attribute.s b/llvm/test/MC/RISCV/invalid-attribute.s
index c640fccd15ae5..b3d7cda73b35c 100644
--- a/llvm/test/MC/RISCV/invalid-attribute.s
+++ b/llvm/test/MC/RISCV/invalid-attribute.s
@@ -13,8 +13,11 @@
 .attribute arch, "foo"
 # CHECK: [[@LINE-1]]:18: error: invalid arch name 'foo', string must begin with rv32{i,e,g}, rv64{i,e,g}, or a supported profile name{{$}}
 
-.attribute arch, "rv32i2p1_y2p0"
-# CHECK: [[@LINE-1]]:18: error: invalid arch name 'rv32i2p1_y2p0', invalid standard user-level extension 'y'
+.attribute arch, "rv32i2p1_z2p0"
+# CHECK: [[@LINE-1]]:18: error: invalid arch name 'rv32i2p1_z2p0', standard user-level extension name missing after 'z'
+
+.attribute arch, "rv32i2p1_t2p0"
+# CHECK: [[@LINE-1]]:18: error: invalid arch name 'rv32i2p1_t2p0', unsupported standard user-level extension 't'
 
 .attribute stack_align, "16"
 # CHECK: [[@LINE-1]]:25: error: expected numeric constant