Criteria for placing a register variable in the CPU register?

Question

Declaring a variable register is a suggestion to the compiler so that, if possible, a specific automatic variable is assigned, if possible.

But how does the compiler decide when to put the registration variable in the CPU register? What algorithm / mechanism does it use to solve?

Thank,

Naveen

Answer 1

In the event that Norman Ramsey does not notice this and does not respond, perhaps a pointer to one of his documents will be in order.

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Answer 2

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Answer 3

, GCC (4.5.x +) SSA- ( ), SSA-

Answer 4

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