[llvm-bugs] [Bug 31285] New: We need a way to specify FP denormal behavior on a per-instruction basis

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31285

            Bug ID: 31285
           Summary: We need a way to specify FP denormal behavior on a
                    per-instruction basis
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: andrew.kaylor at intel.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

As per the discussion in the comments for https://reviews.llvm.org/D27028, we
need a way to control flush-to-zero behavior of floating point operations on a
per instructions basis.

Currently there is a TargetMachine option and a set of function attributes for
controlling denormal behavior.  It isn't clear to me whether this approach is
sufficient for the needs of all architectures.

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