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7609017dc3
user-defined operations that use MMX register types, but the compiler shouldn't generate them on its own. This adds a Synthesizable abstraction to represent this, and changes the vector widening computation so it won't produce MMX types. (The motivation is to remove noise from the ABI compatibility part of the gcc test suite, which has some breakage right now.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101951 91177308-0d34-0410-b5e6-96231b3b80d8
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