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Commit afa8211e authored by Craig Topper's avatar Craig Topper
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[X86] Improve lowering of (v2i64 (setgt X, -1)) on pre-SSE2 targets. Enable... 

[X86] Improve lowering of (v2i64 (setgt X, -1)) on pre-SSE2 targets. Enable v2i64 in foldVectorXorShiftIntoCmp.

Similar to D72302 but for the canonical form for the opposite case. I've changed foldVectorXorShiftIntoCmp to form a target independent setcc node instead of PCMPGT now and enabled its for v2i64 on pre-SSE4.2 targets. The setcc should eventually get lowered to PCMPGT or the new v2i64 sequence.

Differential Revision: https://reviews.llvm.org/D72318
parent b9376690
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