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David Majnemer 3bd87826e5 [InstCombine] Clear out nsw/nuw if we modify computation in the chain
An nsw/nuw operation relies on the values feeding into it to not
overflow if 'poison' is not to be produced.  This means that
optimizations which make modifications to the bottom of a chain (like
SimplifyDemandedBits) must strip out nsw/nuw if they cannot ensure that
they will be preserved.

This fixes PR23309.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235544 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-22 20:59:28 +00:00
autoconf
bindings
cmake [cmake] Quote the path to the target exports file, fixes PR23313 2015-04-22 16:23:00 +00:00
docs
examples [Kaleidoscope] Fix incorrect use of reinterpret_cast. 2015-04-22 20:58:34 +00:00
include [Allocator] Remove memory poisoning before deallocation 2015-04-22 20:56:42 +00:00
lib [InstCombine] Clear out nsw/nuw if we modify computation in the chain 2015-04-22 20:59:28 +00:00
projects
test [InstCombine] Clear out nsw/nuw if we modify computation in the chain 2015-04-22 20:59:28 +00:00
tools Support arm32 R_ARM_V4BX relocation format 2015-04-22 15:26:43 +00:00
unittests Another test to exercise APInt divide step D6. 2015-04-22 18:49:59 +00:00
utils [TableGen] Use 'isa' to identify UnsetInits rather than comparing with the singleton object created by UnsetInit::get(). Makes it more consistent with the other types. 2015-04-22 02:09:45 +00:00
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