[clang] [ARM] Fix test using thumb instead arm arch prefix (PR #166416)

[Tomer Shafir via cfe-commits]

https://github.com/tomershafir created https://github.com/llvm/llvm-project/pull/166416

Currently, the ARM backend incorrectly parses every `arm` prefixed arch to be non-thumb, but `armv6m` is THUMB and doesnt have ARM ops causing the test to fail: `error: Function 'foo' uses ARM instructions, but the target does not support ARM mode execution.`

As a quick triage, this change switches the test to use `thumb`.

Uncovered by https://github.com/llvm/llvm-project/pull/151404

>From 8d3b939d3796553aa1b54ab672b1dd053d4e4530 Mon Sep 17 00:00:00 2001
From: tomershafir <tomer.shafir8 at gmail.com>
Date: Tue, 4 Nov 2025 21:06:57 +0200
Subject: [PATCH] [ARM] Fix test using thumb instead arm arch prefix

Currently, the ARM backend incorrectly parses every `arm` prefixed arch to be non-thumb, but `armv6m` is THUMB and doesnt have ARM ops causing the test to fail: `error: Function 'foo' uses ARM instructions, but the target does not support ARM mode execution.`

As a quick triage, this change switches the test to use `thumb`.

Uncovered by https://github.com/llvm/llvm-project/pull/151404
---
 clang/test/CodeGen/pr45476.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/test/CodeGen/pr45476.cpp b/clang/test/CodeGen/pr45476.cpp
index c95f7fb8cd9c3..3a67904a8e568 100644
--- a/clang/test/CodeGen/pr45476.cpp
+++ b/clang/test/CodeGen/pr45476.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple armv6m-eabi -emit-llvm %s -o - | FileCheck -check-prefix=LIBCALL %s
+// RUN: %clang_cc1 -triple thumbv6m-eabi -emit-llvm %s -o - | FileCheck -check-prefix=LIBCALL %s
 // RUN: %clang_cc1 -triple armv8-eabi -emit-llvm %s -o - | FileCheck -check-prefix=NATIVE %s
 // PR45476