[llvm] X86: make VBMI2 funnel shifts use VSHLD/VSHRD for const splats (PR #169401)
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Thu Nov 27 00:43:04 PST 2025
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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/X86/X86ISelLowering.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 0913c119f..96bf45088 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -57655,7 +57655,7 @@ static SDValue combineFunnelShift(SDNode *N, SelectionDAG &DAG,
if (IsFSHR)
std::swap(Op0, Op1);
unsigned Opcode = IsFSHR ? X86ISD::VSHRD : X86ISD::VSHLD;
-
+
return DAG.getNode(Opcode, DL, VT, {Op0, Op1, Imm});
}
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https://github.com/llvm/llvm-project/pull/169401
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