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[X86][SSE] combineSubToSubus - remove SSE2 early-out.

Authored by RKSimon on Jan 12 2021, 3:50 AM.

Description

[X86][SSE] combineSubToSubus - remove SSE2 early-out.

SSE2 truncation codegen has improved over the past few years (mainly due to better shuffle lowering/combining and computeKnownBits) - its no longer necessary to early-out from v8i32/v8i64 truncations.

This was noticed while looking at completing PR40111 and moving combineSubToSubus to DAGCombine entirely.

Details

Committed
RKSimonJan 12 2021, 4:52 AM
Parents
rG09db958e37b3: [RISCV] Improve scalable-vector shift tests (NFC)
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