The recently added arm/cortex-m55-* tests fail if the compiler does not default to thumb code.
This patch adds -mthumb to the dg-additional-options, which fixes the problem in most cases. When running the tests with an incompatible -march= value, the tests also fail because it conflicts with -mcpu=cortex-m55. I tried to add -march=armv8.1-m.main+XXX but found it awkward to get the right value for XXX to match what each test is adding to cortex-m55, so I propose to consider adding -mthumb as good enough. Maybe we can/should add dg-skip-if for -march? OK with a suitable changelog? Thanks, Christophe
cortex-m55-thumb.patch1
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