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05e11fab87
use of illegal integer types: instead, use a stack slot and copying via integer registers. The existing code is still used if the bitconvert is to a legal integer type. This fires on the PPC testcases 2007-09-08-unaligned.ll and vec_misaligned.ll. It looks like equivalent code is generated with these changes, just permuted, but it's hard to tell. With these changes, nothing in LegalizeDAG produces illegal integer types anymore. This is a prerequisite for removing the LegalizeDAG type legalization code. While there I noticed that the existing code doesn't handle trunc store of f64 to f32: it turns this into an i64 store, which represents a 4 byte stack smash. I added a FIXME about this. Hopefully someone more motivated than I am will take care of it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60964 91177308-0d34-0410-b5e6-96231b3b80d8
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