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[IR] Add AllowContract to FastMathFlags

Description

[IR] Add AllowContract to FastMathFlags

-ffp-contract=fast does not currently work with LTO because it's passed as a
TargetOption to the backend rather than in the IR. This adds it to
FastMathFlags.

This is toward fixing PR25721

Differential Revision: https://reviews.llvm.org/D31164

Details

Committed
anemetMar 28 2017, 1:11 PM
Differential Revision
D31164: [IR] Add AllowContract to FastMathFlags
Parents
rL298938: [DAGCombiner] add helper function for and-of-setcc folds; NFC
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