The GENERIC trees are converted into GIMPLE form and a subsequent control flow graph to support SSA-based optimizations.
generic树被转换成GIMPLE形式，进而转换成控制流图，以支持基于SSA的优化。
GCC 4 brings many changes to the standard compiler suite, the biggest of which is around support for optimizations with the introduction of the tree Static Single Assignment (SSA) form.
GCC4为标准的编译器套件带来了很多变化，最大的变化是为了支持优化而引入的树的StaticSingleAssignment (ssa)形式。
GCC 4 brings many changes to the standard compiler suite, the biggest of which is around support for optimizations with the introduction of the tree Static Single Assignment (SSA) form.
GCC4为标准的编译器套件带来了很多变化，最大的变化是为了支持优化而引入的树的StaticSingleAssignment (ssa)形式。
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