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20fc6ac99e
The existing code in getMemsetValue only handled integer-preferred types when
the fill value was not a constant. Make this more robust in two ways:
1. If the preferred type is a floating-point value, do the mul-splat trick on
the corresponding integer type and then bitcast.
2. If the preferred type is a vector, do the mul-splat trick on one vector
element, and then build a vector out of them.
Fixes PR22754 (although, we should also turn off use of vector types at -O0).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233749 91177308-0d34-0410-b5e6-96231b3b80d8