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Author SHA1 Message Date
Chris Lattner 431bef4409 fix inc/dec to honor -fwrapv and -ftrapv, implementing PR7426. 
llvm-svn: 106962
 2010-06-26 22:18:28 +00:00
Chris Lattner 0bf27620f0 Fix unary minus to trap on overflow with -ftrapv, refactoring binop 
code so we can use it from VisitUnaryMinus.

llvm-svn: 106957
 2010-06-26 21:48:21 +00:00
Chris Lattner 51924e517b Implement support for -fwrapv, rdar://7221421 
As part of this, pull together trapv handling into the same enum.

This also add support for NSW multiplies.

This also makes PCH disagreement on overflow behavior silent, since it
really doesn't matter except for warnings and codegen (no macros get 
defined etc).

llvm-svn: 106956
 2010-06-26 21:25:03 +00:00