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Some of the musttail tests (eg musttail7.c) fail on arm-eabi because check_effective_target_musttail pass, but the actual code in the test is rejected. The reason is that on arm-eabi with the default configuration, the compiler targets armv4t for which TARGET_INTERWORK is true, making arm_function_ok_for_sibcall reject a tail-call candidate if TREE_ASM_WRITTEN (decl) is false. For more recent architecture versions, TARGET_INTERWORK is false, hence the problem was not seen on all arm configurations. musttail7.c is in turn rejected because f2 is recursive, so TREE_ASM_WRITTEN is false. However, the same code used in check_effective_target_musttail is not recursive and the function body for foo has TREE_ASM_WRITTEN == true. The simplest fix is to remove the (empty) body for foo () in check_effective_target_musttail. For consistency, do the same with check_effective_target_tail_call. gcc/testsuite/ChangeLog: PR testsuite/116080 * lib/target-supports.exp (check_effective_target_tail_call): Remove foo's body. (check_effective_target_musttail): Likewise. |
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