4 Commits

Author	SHA1	Message	Date
David Chisnall	dd84ef1e62	Add a -ftrapv-handler= option which allows a handler to invoke instead of simply aborting when a signed operation overflows. This mirrors the (GCC-incompatible) behaviour from clang 1.0 and 1.1 when -ftrapv was specified, but allows the handler to be defined for each compilation unit. ... llvm-svn: 114192	2010-09-17 18:29:54 +00:00
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