[LLVMdev] Restrictions on bitcast of arbitrary vector types?

George Russell george at codeplay.com
Wed Feb 29 02:16:21 PST 2012


The LLVM lang ref (http://llvm.org/docs/LangRef.html#i_bitcast) notes 
that bitcast of vectors to vectors is OK, provided the vectors are of 
the same size. In attempting this on large vector types (e.g. 16xi64 -> 
16xf64), I get assertions related to Extended Value Types when 
attempting to perform code generation, but no errors at the BC level. Is 
it simply unsupported to stray outwith the set of vector types in 
SimpleValueType in ValueTypes.h ?


George Russell
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