Michael Gottesman 3ba6b7c663 [sil-combine] Make output of (extract (load)) -> (load (element_addr)) deterministic by not using pointer address as a sorting criteria for vardecls. ...

Instead for vardecls, we use the index of the field in the structdecl itself as
a stable ordering of vardecls.

I validated that the indeterminism was gone by running the failing test 1000
times in a row. Doug and I were hitting the indeterminism with well less than
100 iterations before, so I feel the number of iterations is sufficient.

Swift SVN r13859

2014-02-13 04:57:54 +00:00

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