43b0c56fda
This patch introduces support for sibling call optimization, when call0 ABI is in effect. gcc/ChangeLog: * config/xtensa/xtensa-protos.h (xtensa_prepare_expand_call, xtensa_emit_sibcall): New prototypes. (xtensa_expand_epilogue): Add new argument that specifies whether or not sibling call. * config/xtensa/xtensa.cc (TARGET_FUNCTION_OK_FOR_SIBCALL): New macro definition. (xtensa_prepare_expand_call): New function in order to share the common code. (xtensa_emit_sibcall, xtensa_function_ok_for_sibcall): New functions. (xtensa_expand_epilogue): Add new argument sibcall_p and use it for sibling call handling. * config/xtensa/xtensa.md (call, call_value): Use xtensa_prepare_expand_call. (call_internal, call_value_internal): Add the condition in order to be disabled if sibling call. (sibcall, sibcall_value, sibcall_epilogue): New expansions. (sibcall_internal, sibcall_value_internal): New insn patterns, and split ones in order to take care of the indirect sibcalls. gcc/testsuite/ChangeLog: * gcc.target/xtensa/sibcalls.c: New. |
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