Craig Topper cf461a0a32 [SelectionDAG][X86] Teach promotion legalization for fp_to_sint/fp_to_uint to insert an assertsext/assertzext based on the original type ...

If we put in an assertsext/zext here, we're able to generate better truncate code using pack on pre-avx512 targets.

Similar is already done during type legalization. This is the equivalent for op legalization

Differential Revision: https://reviews.llvm.org/D40591

llvm-svn: 319368

2017-11-29 22:15:43 +00:00

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