Files
clang-p2996/llvm/test/CodeGen/X86
Simon Pilgrim 369cd349b9 [X86][SSE] Lower suitably sign-extended mul vXi64 using PMULDQ
PMULDQ returns the 64-bit result of the signed multiplication of the lower 32-bits of vXi64 vector inputs, we can lower with this if the sign bits stretch that far.

Differential Revision: https://reviews.llvm.org/D27657

llvm-svn: 289426
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