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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