[PATCH] D23000: [X86] Improve 64-bit shifts on 32-bit targets (PR14593)

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: eli.friedman, bkramer, spatel.
RKSimon added a subscriber: llvm-commits.
RKSimon set the repository for this revision to rL LLVM.

As discussed on PR14593, this patch adds support for lowering to SHLD/SHRD from the patterns generated by DAGTypeLegalizer::ExpandShiftWithKnownAmountBit.

Repository:
  rL LLVM

https://reviews.llvm.org/D23000

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/legalize-shift-64.ll
  test/CodeGen/X86/shift-double.ll

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