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authorFrancis Visoiu Mistrih <francisvm@yahoo.com>2018-08-17 14:46:56 +0000
committerFrancis Visoiu Mistrih <francisvm@yahoo.com>2018-08-17 14:46:56 +0000
commit8bff8325341ecc93369b92c3c56627e8cf5d26a7 (patch)
treedda84207b7af30f43bbef311eea048a732a852f4 /lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp
parent9e50e915fa2cb54011bc837dd4dc7e1793d9f0de (diff)
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[X86] Fix liveness information when expanding X86::EH_SjLj_LongJmp64
test/CodeGen/X86/shadow-stack.ll has the following machine verifier errors: ``` *** Bad machine code: Using a killed virtual register *** - function: bar - basic block: %bb.6 entry (0x7fdc81857818) - instruction: %3:gr64 = MOV64rm killed %2:gr64, 1, $noreg, 8, $noreg - operand 1: killed %2:gr64 *** Bad machine code: Using a killed virtual register *** - function: bar - basic block: %bb.6 entry (0x7fdc81857818) - instruction: $rsp = MOV64rm killed %2:gr64, 1, $noreg, 16, $noreg - operand 1: killed %2:gr64 *** Bad machine code: Virtual register killed in block, but needed live out. *** - function: bar - basic block: %bb.2 entry (0x7fdc818574f8) Virtual register %2 is used after the block. ``` The fix here is to only copy the machine operand's register without the kill flags for all the instructions except the very last one of the sequence. I had to insert dummy PHIs in the test case to force the NoPHI function property to be set to false. More on this here: https://llvm.org/PR38439 Differential Revision: https://reviews.llvm.org/D50260 llvm-svn: 340033
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp')
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