[PATCH] propagate IR-level fast-math-flags to DAG nodes

[Sanjay Patel]

In http://reviews.llvm.org/D8900#157396, @hfinkel wrote:

> Have you tried running under valgrind and/or asan/msan? Does this happen in a debug build, or just an optimized build?


Not yet; that's the next step. I wanted to see if there were structural objections to this patch before chasing down the errors.

I'm seeing the failures with both debug and optimized builds. The tests that fail regularly, but not always are:

  LLVM :: CodeGen/AArch64/aarch64-address-type-promotion.ll
  LLVM :: CodeGen/AArch64/arm64-vector-ldst.ll
  LLVM :: CodeGen/X86/cmovcmov.ll


http://reviews.llvm.org/D8900

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