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2 Commits

Author SHA1 Message Date
Bill Wendling 361c0e5f9c Strengthen check for div inst-combining. 
llvm-svn: 60276
 2008-11-30 04:33:53 +00:00
Bill Wendling 70635adea3 Instcombine was illegally transforming -X/C into X/-C when either X or C 
overflowed on negation. This commit checks to make sure that neithe C nor X
overflows. This requires that the RHS of X (a subtract instruction) be a
constant integer.

llvm-svn: 60275
 2008-11-30 03:42:12 +00:00