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fa55969acb
This fixes another bug found by llvm-stress! If we happen to be doing an i64 load or store into a stack slot that has less than a 4-byte alignment, then the frame-index elimination may need to use an indexed load or store instruction (because the offset may not be a multiple of 4, a requirement of the STD/LD instructions). The extra register needed to hold the offset comes from the register scavenger, and it is possible that the scavenger will need to use an emergency spill slot. As a result, we need to make sure that a spill slot is allocated when doing an i64 load/store into a less-than-4-byte-aligned stack slot. Because test cases for things like this tend to be fairly fragile, I've concatenated a few small bugpoint-reduced test cases together to form the regression test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185907 91177308-0d34-0410-b5e6-96231b3b80d8 |
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