Displaying 1 result from an estimated 1 matches for "if13".
Did you mean:
f13
2017 Jun 10
3
Fusing contract fadd/fsub with normal fmul
Hi,
On LLVM 5.0 (current trunk), fadd/fsub and fmul that are both marked
with `contract` or `fast` can be merged to a fma instruction by the
backend.
I'm wondering about the exact semantic of this new flag as well as
`fast` and in particular, would it be valid to do this when only the
`fadd`/`fsub` (and not the `fmul`) is marked with `contract` or at
least `fast`. The reasoning is that doing