gcc 源码分析--gimple 关键数据结构

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VIP免费原创最新推荐文章于 2026-09-09 09:28:04 发布 748 阅读 AI 写同款· GEO 优化 ›

GCC源码分析（五）——指令生成一、前言　　又有好久没写了，的确很忙。前篇介绍了GCC的pass格局，它是GCC中间语言部分的核心架构，也是贯穿整个编译流程的核心。在完成优化处理之后，GCC必须做的最后一步就是生成最后的编译结果，通常情况下就是汇编文件（文本或者二进制并不重要）。　　前面也讲到了，GCC中间语言的核心数据结构是GENERIC、GIMPLE和RTL。其中的RTL就是和指令紧密相关的一种结构，它是指令生成的起阅读详情

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