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647013
2014 Dec 11
2
[LLVMdev] AArch64 codegen question
Hi AArch64 experts -
I'm working on a DAGCombiner patch, and it causes a change in an existing
regression test.
We're generating this:
ext v0.16b, v1.16b, v1.16b, #8
Rather than this:
mov d0, v1.d[1]
Are those logically equivalent? Is one form preferred over the other?
This is the IR test case in /test/CodeGen/AArch64/neon-scalar-copy.ll:
define <1 x i64>