arm/testsuite: Fix testcase for PR99977

Some targets (eg arm-none-uclinuxfdpiceabi) do not support Thumb-1,
and since the testcase forces -march=armv8-m.base, we need to check
whether this option is actually supported.

Using dg-add-options arm_arch_v8m_base ensure that we pass -mthumb as
needed too.

2021-05-19  Christophe Lyon  <christophe.lyon@linaro.org>

	PR target/99977
	gcc/testsuite/
	* gcc.target/arm/pr99977.c: Require arm_arch_v8m_base.

diff --git a/gcc/testsuite/gcc.target/arm/pr99977.c b/gcc/testsuite/gcc.target/arm/pr99977.c
index 7911899..db330e4 100644 (file)
--- a/gcc/testsuite/gcc.target/arm/pr99977.c
+++ b/gcc/testsuite/gcc.target/arm/pr99977.c
@@ -1,5 +1,7 @@
 /* { dg-do compile } */
-/* { dg-options "-march=armv8-m.base -mfloat-abi=soft -O2" } */
+/* { dg-require-effective-target arm_arch_v8m_base_ok } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_arch_v8m_base } */
 _Bool f1(int *p) { return __sync_bool_compare_and_swap (p, -1, 2); }
 _Bool f2(int *p) { return __sync_bool_compare_and_swap (p, -8, 2); }
 int g1(int *p) { return __sync_val_compare_and_swap (p, -1, 2); }