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8fe9488a40
This is a fix for PR21709 ( http://llvm.org/bugs/show_bug.cgi?id=21709 ). When we have 2 consecutive 16-byte loads that are merged into one 32-byte vector, we can use a single 32-byte load instead. But we don't do this for SandyBridge / IvyBridge because they have slower 32-byte memops. We also don't bother using 32-byte *integer* loads on a machine that only has AVX1 (btver2) because those operands would have to be split in half anyway since there is no support for 32-byte integer math ops. Differential Revision: http://reviews.llvm.org/D6492 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224344 91177308-0d34-0410-b5e6-96231b3b80d8