gcc 源码分析--gimple 关键数据结构

gimple 操作码，支持这些：

DEFGSCODE(GIMPLE_symbol, printable name, GSS_symbol).  */
DEFGSCODE(GIMPLE_ERROR_MARK, "gimple_error_mark", GSS_BASE)
DEFGSCODE(GIMPLE_COND, "gimple_cond", GSS_WITH_OPS)
DEFGSCODE(GIMPLE_DEBUG, "gimple_debug", GSS_WITH_OPS)
DEFGSCODE(GIMPLE_GOTO, "gimple_goto", GSS_WITH_OPS)
DEFGSCODE(GIMPLE_LABEL, "gimple_label", GSS_WITH_OPS)
DEFGSCODE(GIMPLE_SWITCH, "gimple_switch", GSS_WITH_OPS)
DEFGSCODE(GIMPLE_ASSIGN, "gimple_assign", GSS_WITH_MEM_OPS)
DEFGSCODE(GIMPLE_ASM, "gimple_asm", GSS_ASM)
DEFGSCODE(GIMPLE_CALL, "gimple_call", GSS_CALL)
DEFGSCODE(GIMPLE_TRANSACTION, "gimple_transaction", GSS_TRANSACTION)
DEFGSCODE(GIMPLE_RETURN, "gimple_return", GSS_WITH_MEM_OPS)
DEFGSCODE(GIMPLE_BIND, "gimple_bind", GSS_BIND)
DEFGSCODE(GIMPLE_CATCH, "gimple_catch", GSS_CATCH)
DEFGSCODE(GIMPLE_EH_FILTER, "gimple_eh_filter", GSS_EH_FILTER)
DEFGSCODE(GIMPLE_EH_MUST_NOT_THROW, "gimple_eh_must_not_throw", GSS_EH_MNT)
DEFGSCODE(GIMPLE_EH_ELSE, "gimple_eh_else", GSS_EH_ELSE)
DEFGSCODE(GIMPLE_RESX, "gimple_resx", GSS_EH_CTRL)
DEFGSCODE(GIMPLE_EH_DISPATCH, "gimple_eh_dispatch", GSS_EH_CTRL)
DEFGSCODE(GIMPLE_PHI, "gimple_phi", GSS_PHI)
DEFGSCODE(GIMPLE_TRY, "gimple_try", GSS_TRY)
DEFGSCODE(GIMPLE_NOP, "gimple_nop", GSS_BASE)
DEFGSCODE(GIMPLE_OMP_ATOMIC_LOAD, "gimple_omp_atomic_load",
DEFGSCODE(GIMPLE_OMP_ATOMIC_STORE, "gimple_omp_atomic_store",
DEFGSCODE(GIMPLE_OMP_CONTINUE, "gimple_omp_continue", GSS_OMP_CONTINUE)
DEFGSCODE(GIMPLE_OMP_CRITICAL, "gimple_omp_critical", GSS_OMP_CRITICAL)
DEFGSCODE(GIMPLE_OMP_FOR, "gimple_omp_for", GSS_OMP_FOR)
DEFGSCODE(GIMPLE_OMP_STRUCTURED_BLOCK, "gimple_omp_structured_block", GSS_OMP)
DEFGSCODE(GIMPLE_OMP_MASTER, "gimple_omp_master", GSS_OMP)
DEFGSCODE(GIMPLE_OMP_MASKED, "gimple_omp_masked", GSS_OMP_SINGLE_LAYOUT)
DEFGSCODE(GIMPLE_OMP_TASKGROUP, "gimple_omp_taskgroup", GSS_OMP_SINGLE_LAYOUT)
DEFGSCODE(GIMPLE_OMP_PARALLEL, "gimple_omp_parallel", GSS_OMP_PARALLEL_LAYOUT)
DEFGS