Commit Graph

7 Commits

Author SHA1 Message Date
Bruno Cardoso Lopes 7b6c1ec22d [X86][MMX] Remove widening experimental flag from MMX tests.
Turns out that after the past MMX commits, we don't need to rely on this
flag to get better codegen for MMX. Also update the tests to become
triple neutral.

llvm-svn: 230637
2015-02-26 15:10:38 +00:00
Bruno Cardoso Lopes ab7afa9144 [X86][MMX] Reapply: Add MMX instructions to foldable tables
Reapply r230248.

Teach the peephole optimizer to work with MMX instructions by adding
entries into the foldable tables. This covers folding opportunities not
handled during isel.

llvm-svn: 230499
2015-02-25 15:14:02 +00:00
Bruno Cardoso Lopes 32173cdf06 Revert "[X86][MMX] Add MMX instructions to foldable tables"
This reverts commit r230226 since it breaks win buildbots.

llvm-svn: 230248
2015-02-23 19:53:37 +00:00
Bruno Cardoso Lopes f488e2ae69 [X86][MMX] Add MMX instructions to foldable tables
Teach the peephole optimizer to work with MMX instructions by adding
entries into the foldable tables. This covers folding opportunities not
handled during isel.

llvm-svn: 230226
2015-02-23 15:23:22 +00:00
Bruno Cardoso Lopes ab9ae87623 [X86][MMX] Handle i32->mmx conversion using movd
Implement a BITCAST dag combine to transform i32->mmx conversion patterns
into a X86 specific node (MMX_MOVW2D) and guarantee that moves between
i32 and x86mmx are better handled, i.e., don't use store-load to do the
conversion..

llvm-svn: 228293
2015-02-05 13:23:07 +00:00
Bruno Cardoso Lopes 077774b820 [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

llvm-svn: 227969
2015-02-03 14:46:49 +00:00
Bruno Cardoso Lopes f7410e5292 [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.

llvm-svn: 227869
2015-02-02 22:00:48 +00:00