Chris Lattner fed8ceb56a Implement a few symbolic constant folding things. X ? Y : Y is Y. ... Fold: seteq ({ short }* cast (int 1 to { short }*), { short }* null) setlt ({ short }* cast (int 1 to { short }*), { short }* cast (int 2 to { short }*)) to false/true. These last two commonly occur in the output of compilers that tag integers, like cozmic's scheme compiler. Tested by Regression/Assembler/ConstantExprFold.llx llvm-svn: 25112		2006-01-05 07:49:30 +00:00
llvm	Implement a few symbolic constant folding things. X ? Y : Y is Y.	2006-01-05 07:49:30 +00:00