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Commit 07f4fa81 authored by Jakob Stoklund Olesen's avatar Jakob Stoklund Olesen
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TwoAddressInstructionPass::CoalesceExtSubRegs can insert INSERT_SUBREG 

instructions, but it doesn't really understand live ranges, so the first
INSERT_SUBREG uses an implicitly defined register.

Fix it in LiveVariableAnalysis by adding the <undef> flag.

llvm-svn: 106333
parent cf9e8a98
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