2 Commits

Author	SHA1	Message	Date
Sanjay Patel	5bac8f9b95	fixed to test features, not CPUs ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231524 91177308-0d34-0410-b5e6-96231b3b80d8	2015-03-06 21:50:42 +00:00
Andrea Di Biagio	cfdf805286	[X86] Teach how to combine horizontal binop even in the presence of undefs. ... Before this change, the backend was unable to fold a build_vector dag node with UNDEF operands into a single horizontal add/sub. This patch teaches how to combine a build_vector with UNDEF operands into a horizontal add/sub when possible. The algorithm conservatively avoids to combine a build_vector with only a single non-UNDEF operand. Added test haddsub-undef.ll to verify that we correctly fold horizontal binop even in the presence of UNDEFs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211265 91177308-0d34-0410-b5e6-96231b3b80d8	2014-06-19 10:29:41 +00:00