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2 Commits

Author SHA1 Message Date
Bob Wilson
8d0b53dc62 Fix handling of unreachable blocks in the SSAUpdater. The previous code only 
handled cases where a block had zero predecessors, but failed to detect other
cases like loops with no entries.  The SSAUpdater is already doing a forward
traversal through the blocks, so it is not hard to identify the blocks that
were never reached on that traversal.  This fixes the crash for ppc on the
stepanov_vector test.

llvm-svn: 103184
 2010-05-06 16:24:11 +00:00
Bob Wilson
e81252b747 Combine the implementations of the core part of the SSAUpdater and 
MachineSSAUpdater to avoid duplicating all the code.

llvm-svn: 103060
 2010-05-04 23:18:19 +00:00