66d41f8483
This reverts commit f68774fd1ad570fef850439ac163b61dc96b98f1. The original PR broke the sanitizer-aarch64-linux-bootstrap-asan builder: https://lab.llvm.org/buildbot/#/builders/24/builds/16298 The cause of the failure was exegesis producing inconsistent results across libc++ implementations when seeded with '--random-generator-seed=<seed>'. The failing Buildbot does a 2-stage build, in the 1st stage it builds LLVMs libc++ then builds LLVM with it in the 2nd stage. The exegesis implementation relies on uniform_int_distribution which doesn't guarantee consistent results across implementations. The tests seeded the RNG because FileCheck can't handle the wrap around constraint of the register pairs, e.g. { v31.1d, v0.1d }. The test is updated to no longer rely on '--random-generator-seed'. Unfortunately the tests aren't particularly good anymore, but not sure what else can be done for now.
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