[LLVMdev] Patch for non standard usage of math functions

[Morten Ofstad]

In lib/Analysis/ScalarEvolution.cpp there is a call to sqrt with an 
int64_t argument - To make this call in standard C++ a cast to double is 
required.

In lib/CodeGen/LiveIntervalAnalysis.cppn there is a call to pow where 
the second argument is an unsigned int. The standard C++ call is with 
'int' and the compiler does not know if it should promote the unsigned 
int to float or double so it cannot resolve the overloaded pow function. 
I solved this by casting to int...

m.

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