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104 Commits

Author SHA1 Message Date
Chris Lattner
06e4402e71 Add DCE as integral part of the level raising to avoid processing instructions that are dead 
llvm-svn: 1084
 2001-11-01 07:00:51 +00:00
Chris Lattner
8b30d77212 * Implement expression type conversion for constant values 
* Fix a problem setting a name on a constant value that died because no symbol table was passed in
* Add some comments describing the passes
* Implement a new peephole:
     // Peephole optimize the following instructions:
     // %t = cast <T1>* %P to <T2> * ;; If T1 is losslessly convertable to T2
     // store <T2> %V, <T2>* %t
     //
     // Into:
     // %t = cast <T2> %V to <T1>
     // store <T1> %t2, <T1>* %P

llvm-svn: 1080
 2001-11-01 05:57:59 +00:00
Chris Lattner
261785f670 * Convert getelementptr/store pairs into a single store 
* Convert getelementptr/load pairs into a single load

llvm-svn: 1075
 2001-11-01 03:12:34 +00:00
Chris Lattner
01dc694896 Initial checkin of level raising code, after move and cleanup and expands from the opt directory 
llvm-svn: 1074
 2001-11-01 02:42:08 +00:00