Nikita Popov 8654837372 [ConstantFolding] Fold undef for integer intrinsics ... This fixes https://bugs.llvm.org/show_bug.cgi?id=40110. This implements handling of undef operands for integer intrinsics in ConstantFolding, in particular for the bitcounting intrinsics (ctpop, cttz, ctlz), the with.overflow intrinsics, the saturating math intrinsics and the funnel shift intrinsics. The undef behavior follows what InstSimplify does for the general cas e of non-constant operands. For the bitcount intrinsics (where InstSimplify doesn't do undef handling -- there cannot be a combination of an undef + non-constant operand) I'm using a 0 result if the intrinsic is defined for zero and undef otherwise. Differential Revision: https://reviews.llvm.org/D55950 llvm-svn: 350971		2019-01-11 21:18:00 +00:00
..
bitcount.ll	[ConstantFolding] Fold undef for integer intrinsics	2019-01-11 21:18:00 +00:00
cast-vector.ll
funnel-shift.ll	[ConstantFolding] Fold undef for integer intrinsics	2019-01-11 21:18:00 +00:00
gep-constanfolding-error.ll
gep-zeroinit-vector.ll	[ConstantFold] Disallow folding vector geps into bitcasts	2018-06-01 19:34:35 +00:00
gep.ll	Prevent Constant Folding From Optimizing inrange GEP	2018-09-11 01:53:36 +00:00
min-max.ll	[ConstantFolding] Constant fold minimum and maximum intrinsics	2018-10-19 18:15:32 +00:00
saturating-add-sub.ll	[ConstantFolding] Fold undef for integer intrinsics	2019-01-11 21:18:00 +00:00
timeout.ll
vector-undef-elts.ll	[InstCombine] remove unnecessary shuffle undef folding	2018-08-29 13:24:34 +00:00
vectorgep-crash.ll