gcc: Nvidia PTX Variable Attributes

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1 6.32.11 Nvidia PTX Variable Attributes
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1 These variable attributes are supported by the Nvidia PTX back end:
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1 'shared'
1      Use this attribute to place a variable in the '.shared' memory
1      space.  This memory space is private to each cooperative thread
1      array; only threads within one thread block refer to the same
1      instance of the variable.  The runtime does not initialize
1      variables in this memory space.
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