Matt Pharr 78d62705cc Cache element types in StructType. ...

Previously, GetElementType() would end up causing dynamic allocation to
happen to compute the final element type (turning types with unbound
variability into the same type with the struct's variability) each it was
called, which was wasteful and slow.  Now we cache the result.

Another 20% perf on compiling that problematic program.

2012-05-04 13:55:38 -07:00

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