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* [SystemZ] Check for presence of vector support in SystemZISelLoweringJonas Paulsson2017-04-071-0/+18
A test case was found with llvm-stress that caused DAGCombiner to crash when compiling for an older subtarget without vector support. SystemZTargetLowering::combineTruncateExtract() should do nothing for older subtargets. This check was placed in canTreatAsByteVector(), which also helps in a few other places. Review: Ulrich Weigand llvm-svn: 299763
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