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4 Commits

Author SHA1 Message Date
Eli Friedman
e1655eebc3 Silly mistake from r137777; restore significant isStructTy() checks. While here, be a bit more defensive 
with unknown instructions.

Fixes PR10687.

llvm-svn: 137836
 2011-08-17 18:10:43 +00:00
Eli Friedman
b4733f623f A bunch of misc fixes to SCCPSolver::ResolvedUndefsIn, including a fix to stop 
making random bad assumptions about instructions which are not explicitly listed.  

Includes fix for rdar://9956541, a version of "undef ^ undef should return
0 because it's easier than arguing with users".

llvm-svn: 137777
 2011-08-16 22:06:31 +00:00
Chris Lattner
9065710fcf fix PR6940: sitofp(undef) folds to 0.0, not undef. 
llvm-svn: 102358
 2010-04-26 18:21:23 +00:00
Chris Lattner
08fed5e338 fix a SCCP miscompilation that could happen when a 
forced constant is changed to a constant, we would end
up adding the instruction to the wrong worklist, 
preventing it from being properly revisited.  This fixes
rdar://7832370

llvm-svn: 100837
 2010-04-09 01:14:31 +00:00