Lang, Great, thanks!
Can you please add support for making a*c - b into fma(a, c, -b), etc. This is very important for performance on PPC (because this gets pattern-matched into a single instruction). -Hal On Wed, 26 Sep 2012 17:12:50 -0700 Lang Hames <[email protected]> wrote: > Hi All, > > This patch adds support for the FP_CONTRACT pragma to clang. It adds > a bit to BinaryOperator and CXXOperatorCallExpr to track the > FP_CONTRACT pragma state as each AST node is constructed. Pragma > state is made to follow scope correctly by having an RAII object save > and restore the state when the parser encounters a new compound > statement body. The -ffp-contract option is tested during codegen, > and fmuladd intrinsics (representing fusing opportunities) are output > only if --ffp-contract=on. > > This patch does NOT include warnings/errors for specifying > FP_CONTRACT in invalid contexts that could be confusing (e.g. > introducing FP_CONTRACT at class scope). I think it's reasonable to > start by supporting valid use cases, and add restrictions/diagnostics > in a follow-up patch. > > Comments and feedback most welcome. > > Cheers, > Lang. -- Hal Finkel Postdoctoral Appointee Leadership Computing Facility Argonne National Laboratory _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
