[PATCH] Use the 'arcp' fast-math-flag when combining repeated FP divisors

[Akira Hatanaka]

To preserve backward compatibility, I think we should make sure functions using fast math attributes (e.g., "unsafe-fp-math" in test/CodeGen/PowerPC/fdiv-combine.ll) still get optimized after we migrate to modeling those flags at the node-level (using autoupgrade?).


http://reviews.llvm.org/D9708

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