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7 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen 0241308954 Expand V_SET0 to xorps by default. 
The xorps instruction is smaller than pxor, so prefer that encoding.

The ExecutionDepsFix pass will switch the encoding to pxor and xorpd
when appropriate.

llvm-svn: 143996
 2011-11-07 19:15:58 +00:00
Bruno Cardoso Lopes fa1ca3070b Change all checks regarding the presence of any SSE level to always 
take into consideration the presence of AVX. This change, together with
the SSEDomainFix enabled for AVX, makes AVX codegen to always (hopefully)
emit the same code as SSE for 128-bit vector ops. I don't
have a testcase for this, but AVX now beats SSE in performance for
128-bit ops in the majority of programas in the llvm testsuite

llvm-svn: 139817
 2011-09-15 18:27:36 +00:00
Bruno Cardoso Lopes ff8d8a830e Fix PR10845. SUBREG_TO_REG shouldn't be used when the input and 
destination types are equal!

llvm-svn: 139553
 2011-09-12 22:59:23 +00:00
Bruno Cardoso Lopes 296256fb32 Add support for 256-bit versions of VSHUFPD and VSHUFPS. 
llvm-svn: 138546
 2011-08-25 02:58:26 +00:00
Bruno Cardoso Lopes 2e99f1b3aa Instead of always leaving the work to the generic legalizer when 
there is no support for native 256-bit shuffles, be more smart in some
cases, for example, when you can extract specific 128-bit parts and use
regular 128-bit shuffles for them. Example:

For this shuffle:
  shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32>
                <i32 1, i32 0, i32 7, i32 6>

This was expanded to:
  vextractf128  $1, %ymm1, %xmm2
  vpextrq $0, %xmm2, %rax
  vmovd %rax, %xmm1
  vpextrq $1, %xmm2, %rax
  vmovd %rax, %xmm2
  vpunpcklqdq %xmm1, %xmm2, %xmm1
  vpextrq $0, %xmm0, %rax
  vmovd %rax, %xmm2
  vpextrq $1, %xmm0, %rax
  vmovd %rax, %xmm0
  vpunpcklqdq %xmm2, %xmm0, %xmm0
  vinsertf128 $1, %xmm1, %ymm0, %ymm0
  ret

Now we get:
  vshufpd $1, %xmm0, %xmm0, %xmm0
  vextractf128  $1, %ymm1, %xmm1
  vshufpd $1, %xmm1, %xmm1, %xmm1
  vinsertf128 $1, %xmm1, %ymm0, %ymm0

llvm-svn: 137733
 2011-08-16 18:21:54 +00:00
Bruno Cardoso Lopes 043c820800 Fix PR10492 by teaching MOVHLPS and MOVLPS mask matching to be more strict. 
llvm-svn: 137324
 2011-08-11 18:59:13 +00:00
Bruno Cardoso Lopes 337a7fdb13 Rename and tidy up tests 
llvm-svn: 137103
 2011-08-09 03:04:23 +00:00