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17a870f07c
This is the FP sibling of D43141 with the corresponding IR change in rL327212. We can't propagate undef here because if a variable operand is a NaN, these binops must propagate NaN. Neither global nor node-level fast-math makes a difference. If we have 'nnan', I think later folds can turn the NaN into undef. The tests in X86/fp-undef.ll are meant to be the definitive verification for these folds - everything reduces identically now. The other test changes are collateral damage. They may need to be altered to preserve their intent. Differential Revision: https://reviews.llvm.org/D47026 llvm-svn: 332920
Low Level Virtual Machine (LLVM)
This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.