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89305e5345
Fix for PR20648 - http://llvm.org/bugs/show_bug.cgi?id=20648 This patch checks the operands of a vselect to see if all values are constants. If yes, bail out of any further attempts to create a blend or shuffle because SelectionDAGLegalize knows how to turn this kind of vselect into a single load. This already happens for machines without SSE4.1, so the added checks just send more targets down that path. Differential Revision: http://reviews.llvm.org/D4934 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216121 91177308-0d34-0410-b5e6-96231b3b80d8