[llvm-commits] [llvm-gcc] USELESS-BITCASTS.patch (please apply)

[Reid Spencer]

Here's a small patch to llvm-convert.cpp that prevents llvm-gcc from
creating useless bit casts. It just checks to make sure that the types
are different before inserting a cast. This saves a bit of memory and
gives InstCombine less work to do as these useless casts were being
inserted in numerous places only to be stripped out again later.

Reid.
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