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Commit 75cf2e03 authored by Duncan Sands's avatar Duncan Sands
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Fix a bug in which a node could be added to the 

worklist twice: UpdateNodeOperands could morph
a new node into a node already on the worklist.
We would then recalculate the NodeId for this
existing node and add it to the worklist.  The
testcase is ARM/cse-libcalls.ll, the problem
showing up once UpdateNodeOperands is taught to
do CSE for calls.

llvm-svn: 58246
parent 7b700575
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