Merging r310241 and r310242:

Merging r310241 and r310242:
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r310241 | vitalybuka | 2017-08-07 00:12:34 -0700 (Mon, 07 Aug 2017) | 3 lines

[asan] Disable checking of arguments passed by value for --asan-force-dynamic-shadow

Fails with "Instruction does not dominate all uses!"
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r310242 | vitalybuka | 2017-08-07 00:35:33 -0700 (Mon, 07 Aug 2017) | 1 line

[asan] Fix asan dynamic shadow check before copyArgsPassedByValToAllocas
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_50@310309 91177308-0d34-0410-b5e6-96231b3b80d8