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2 Commits

Author SHA1 Message Date
Bruno Cardoso Lopes
7df357f552 [X86][MMX] Improve transfer from mmx to i32 
Improve EXTRACT_VECTOR_ELT DAG combine to catch conversion patterns
between x86mmx and i32 with more layers of indirection.

Before:
  movq2dq %mm0, %xmm0
  movd %xmm0, %eax
After:
  movd %mm0, %eax

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227969 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-03 14:46:49 +00:00
Bruno Cardoso Lopes
d821e0a5cc [X86][MMX] Add tests for MMX extract element 
LLVM ToT produces poor MMX code compared to 3.5. However, part of the previous
functionality can be achieved by using -x86-experimental-vector-widening-legalization.
Add tests to be sure we don't regress again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227869 91177308-0d34-0410-b5e6-96231b3b80d8
 2015-02-02 22:00:48 +00:00