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PR target/38900 * config/i386/i386.h (CONDITIONAL_REGISTER_USAGE): Move to i386.c. (enum reg_class): Add CLOBBERED_REGS. (REG_CLASS_NAMES, REG_CLASS_CONTENTS): Likewise. * config/i386/i386.c (ix86_conditional_register_usage): Moved from CONDITIONAL_REGISTER_USAGE; build CLOBBERED_REGS for 64-bit. (ix86_function_ok_for_sibcall): Tidy. Disallow MS->SYSV sibcalls. (ix86_expand_call): Use sibcall_insn_operand when needed. Don't force 64-bit sibcalls into R11. * config/i386/constraints.md (U): New constraint. * config/i386/i386.md (sibcall_1, sibcall_value_1): Use it. (sibcall_1_rex64, sibcall_value_1_rex64): Likewise. (sibcall_1_rex64_v, sibcall_value_1_rex64_v): Remove. From-SVN: r149373
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