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Fix transmute::<T, U> where T requires a bigger alignment than U #33233

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Fix transmute::<T, U> where T requires a bigger alignment than U #33233

wants to merge 1 commit into from
+58 −1

Commits on Apr 27, 2016

  1. Fix transmute::<T, U> where T requires a bigger alignment than U 

    For types that are not bitcast-compatible, transmute tries to avoid
generating a temporary by translating its source expression directly
into its destination, but when the source type has a bigger alignment
requirement than the destination, this can lead to code that breaks due
to misaligned stores. So in that case we need to generate a temporary
for the source expression and then copy that into the destination,
setting the proper alignment information on the memcpy/store.

Fixes rust-lang#32947
    @dotdash
    dotdash committed Apr 27, 2016
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