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2 Commits

Author SHA1 Message Date
Chris Lattner
eccec47f5c prevent jump threading from merging blocks when their address is 
taken (and used!).  This prevents merging the blocks (invalidating
the block addresses) in a case like this:

#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })

void foo() {
  printf("%p\n", _THIS_IP_);
  printf("%p\n", _THIS_IP_);
  printf("%p\n", _THIS_IP_);
}

which fixes PR4151.

llvm-svn: 125829
 2011-02-18 04:43:06 +00:00
Frits van Bommel
1494a2f6fe Implement jump threading of 'indirectbr' by keeping track of whether we're looking for ConstantInt*s or BlockAddress*s. 
llvm-svn: 121066
 2010-12-06 23:36:56 +00:00