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6 Commits

Author SHA1 Message Date
Frits van Bommel 0bb2ad2cf7 Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code. 
llvm-svn: 128379
 2011-03-27 14:26:13 +00:00
Chris Lattner b9681ad442 fix a bug I introduced, no idea how this didn't repro right. 
llvm-svn: 116462
 2010-10-14 00:30:00 +00:00
Chris Lattner c7bd5740eb hack to unbreak buildbots 
llvm-svn: 116461
 2010-10-14 00:26:10 +00:00
Chris Lattner 698661c741 add uadd_ov/usub_ov to apint, consolidate constant folding 
logic to use the new APInt methods.  Among other things this
implements rdar://8501501 - llvm.smul.with.overflow.i32 should constant fold

which comes from "clang -ftrapv", originally brought to my attention from PR8221.

llvm-svn: 116457
 2010-10-14 00:05:07 +00:00
Evan Phoenix 44e5dbcaf0 Extend ConstantFolding to understand signed overflow variants 
llvm-svn: 83338
 2009-10-05 22:53:52 +00:00
Chris Lattner 59d939894b teach the optimizer how to constant fold uadd/usub intrinsics. 
llvm-svn: 83295
 2009-10-05 05:26:04 +00:00