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As discussed on PR28461 we currently miss the chance to lower "fptosi <2 x double> %arg to <2 x i32>" to cvttpd2dq due to its use of illegal types. This patch adds support for fptosi to 2i32 from both 2f64 and 2f32. It also recognises that cvttpd2dq zeroes the upper 64-bits of the xmm result (similar to D23797) - we still don't do this for the cvttpd2dq/cvttps2dq intrinsics - this can be done in a future patch. Differential Revision: https://reviews.llvm.org/D23808 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284459 91177308-0d34-0410-b5e6-96231b3b80d8
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