search for: test_vector_copy_dup_dv2d

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2014 Dec 11
2
[LLVMdev] AArch64 codegen question
...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> @test_vector_copy_dup_dv2D(<1 x i64> %a, <2 x i64> %c) { ; CHECK-LABEL: test_vector_copy_dup_dv2D ; CHECK: {{dup|mov}} {{d[0-9]+}}, {{v[0-9]+}}.d[1] %vget_lane = extractelement <2 x i64> %c, i32 1 %vset_lane = insertelement <1 x i64> undef, i64 %vget_lane, i32 0 ret <1 x i64> %vset_lan...