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This commit enables forming vector extloads for ARM. It only does so for legal types, and when we can't fold the extension in a wide/long form of the user instruction. Enabling it for larger types isn't as good an idea on ARM as it is on X86, because: - we pretend that extloads are legal, but end up generating vld+vmov - we have instructions like vld {dN, dM}, which can't be generated when we "manually expand" extloads to vld+vmov. For legal types, the combine doesn't fire that often: in the integration tests only in a big endian testcase, where it removes a pointless AND. Related to rdar://19723053 Differential Revision: http://reviews.llvm.org/D7423 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231396 91177308-0d34-0410-b5e6-96231b3b80d8 |
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