4bb7b6fae3
As part of https://discourse.llvm.org/t/rfc-remove-most-constant-expressions/63179, this removes support for the floating-point binop constant expressions fadd, fsub, fmul, fdiv and frem. As part of this change, the C APIs LLVMConstFAdd, LLVMConstFSub, LLVMConstFMul, LLVMConstFDiv and LLVMConstFRem are removed. The LLVMBuild APIs should be used instead. Differential Revision: https://reviews.llvm.org/D129478