[Clang][ARM] Fix tests using thumb instead arm arch on cc1 (#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 when compiling to assembly and not LLVM IR: `error:
Function 'foo' uses ARM instructions, but the target does not support
ARM mode execution.` This only happens when invoking cc1 directly and
not the Clang driver.

As a quick triage, this patch changes the tests to use `thumb`.

Uncovered by #151404

Author: tomershafir

clang/test/AST/ast-dump-arm-attr.c

@@ -2,7 +2,7 @@
 // RUN: %clang_cc1 -triple arm-apple-darwin -ast-dump -ast-dump-filter Test %s \
 // RUN: | FileCheck --strict-whitespace %s
 //
-// RUN: %clang_cc1 -triple armv8m.base-none-eabi -mcmse -ast-dump -ast-dump-filter Test %s \
+// RUN: %clang_cc1 -triple thumbv8m.base-none-eabi -mcmse -ast-dump -ast-dump-filter Test %s \
 // RUN: | FileCheck --strict-whitespace %s --check-prefix=CHECK-CMSE
 //
 // Tests with serialization:
@@ -11,8 +11,8 @@
 // RUN: | sed -e "s/ <undeserialized declarations>//" -e "s/ imported//" \
 // RUN: | FileCheck --strict-whitespace %s
 //
-// RUN: %clang_cc1 -triple armv8m.base-none-eabi -mcmse -emit-pch -o %t %s
-// RUN: %clang_cc1 -x c -triple armv8m.base-none-eabi -mcmse -include-pch %t -ast-dump-all -ast-dump-filter Test /dev/null \
+// RUN: %clang_cc1 -triple thumbv8m.base-none-eabi -mcmse -emit-pch -o %t %s
+// RUN: %clang_cc1 -x c -triple thumbv8m.base-none-eabi -mcmse -include-pch %t -ast-dump-all -ast-dump-filter Test /dev/null \
 // RUN: | sed -e "s/ <undeserialized declarations>//" -e "s/ imported//" \
 // RUN: | FileCheck --strict-whitespace %s
 

clang/test/CodeGen/arm-acle-coproc.c

@@ -4,10 +4,10 @@
 // RUN: %clang_cc1 -triple armv5te %s -E -dD -o - | FileCheck --check-prefix=CHECK-V5-TE %s
 // RUN: %clang_cc1 -triple armv5tej %s -E -dD -o - | FileCheck --check-prefix=CHECK-V5-TE %s
 // RUN: %clang_cc1 -triple armv6 %s -E -dD -o - | FileCheck --check-prefix=CHECK-V6 %s
-// RUN: %clang_cc1 -triple armv6m %s -E -dD -o - | FileCheck --check-prefix=CHECK-V6M %s
+// RUN: %clang_cc1 -triple thumbv6m %s -E -dD -o - | FileCheck --check-prefix=CHECK-V6M %s
 // RUN: %clang_cc1 -triple armv7a %s -E -dD -o - | FileCheck --check-prefix=CHECK-V7 %s
 // RUN: %clang_cc1 -triple armv7r %s -E -dD -o - | FileCheck --check-prefix=CHECK-V7 %s
-// RUN: %clang_cc1 -triple armv7m %s -E -dD -o - | FileCheck --check-prefix=CHECK-V7 %s
+// RUN: %clang_cc1 -triple thumbv7m %s -E -dD -o - | FileCheck --check-prefix=CHECK-V7 %s
 // RUN: %clang_cc1 -triple armv8a %s -E -dD -o - | FileCheck --check-prefix=CHECK-V8 %s
 // RUN: %clang_cc1 -triple armv8r %s -E -dD -o - | FileCheck --check-prefix=CHECK-V8 %s
 // RUN: %clang_cc1 -triple armv8.1a %s -E -dD -o - | FileCheck --check-prefix=CHECK-V8 %s

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
 

clang/test/Sema/builtins-arm-exclusive-124.c

@@ -1,5 +1,5 @@
-// RUN: %clang_cc1 -triple armv7m -fsyntax-only -verify %s
-// RUN: %clang_cc1 -triple armv8m.main -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple thumbv7m -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple thumbv8m.main -fsyntax-only -verify %s
 // RUN: %clang_cc1 -triple armv8.1m.main -fsyntax-only -verify %s
 
 // All these architecture versions provide 1-, 2- or 4-byte exclusive accesses,

clang/test/Sema/builtins-arm-exclusive-none.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple armv6m -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple thumbv6m -fsyntax-only -verify %s
 
 // Armv6-M does not support exclusive loads/stores at all, so all uses of
 // __builtin_arm_ldrex[d] and __builtin_arm_strex[d] is forbidden.