[PATCH] Add NSW/NUW flags in InstCombine

[Joey Gouly]

Add the NSW or NUW flags in cases that we can detect will not produce an overflow.

Patch by Georgia Kouveli!

http://llvm-reviews.chandlerc.com/D2426

Files:
  lib/Transforms/InstCombine/InstCombine.h
  lib/Transforms/InstCombine/InstCombineAddSub.cpp
  lib/Transforms/InstCombine/InstructionCombining.cpp
  test/Transforms/InstCombine/cast.ll
  test/Transforms/InstCombine/ffs-1.ll
  test/Transforms/InstCombine/rem.ll
  test/Transforms/InstCombine/select.ll
  test/Transforms/InstCombine/sext.ll
  test/Transforms/InstCombine/zext-bool-add-sub.ll
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D2426.1.patch
Type: text/x-patch
Size: 11414 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20131217/9d134aca/attachment.bin>