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d2153694e0
This patch removes a chunk of special case logic for folding (float)sqrt((double)x) -> sqrtf(x) in InstCombineCasts and handles it in the mainstream path of SimplifyLibCalls. No functional change intended, but I loosened the restriction on the existing sqrt testcases to allow for this optimization even without unsafe-fp-math because that's the existing behavior. I also added a missing test case for not shrinking the llvm.sqrt.f64 intrinsic in case the result is used as a double. Differential Revision: http://reviews.llvm.org/D5919 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220514 91177308-0d34-0410-b5e6-96231b3b80d8