Erich Keane 97da34e015 [OpenACC] Add 'collapse' clause AST/basic Sema implementation (#109461) ...

The 'collapse' clause on a 'loop' construct is used to specify how many
nested loops are associated with the 'loop' construct. It takes an
optional 'force' tag, and an integer constant expression as arguments.

There are many other restrictions based on the contents of the loop/etc,
but those are implemented in followup patches, for now, this patch just
adds the AST node and does basic argument checking on the loop-count.

2024-10-01 06:40:21 -07:00

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