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14 Commits

Author SHA1 Message Date
Simon Pilgrim d7518896ff [X86][SSE] Fix domains for VZEXT_LOAD type instructions 
Add the missing domain equivalences for movss, movsd, movd and movq zero extending loading instructions.

Differential Revision: https://reviews.llvm.org/D27684

llvm-svn: 289825
 2016-12-15 16:05:29 +00:00
Simon Pilgrim 8893bd95f0 [X86][SSE] Consistently set MOVD/MOVQ load/store/move instructions to integer domain 
We are being inconsistent with these instructions (and all their variants.....) with a random mix of them using the default float domain.

Differential Revision: https://reviews.llvm.org/D27419

llvm-svn: 288902
 2016-12-07 12:10:49 +00:00
Sanjay Patel 066139a3ec [x86] allow FP-logic ops when one operand is FP and result is FP 
We save an inter-register file move this way. If there's any CPU where
the FP logic is slower, we could transform this back to int-logic in 
MachineCombiner.

This helps, but doesn't solve, PR6137:
https://llvm.org/bugs/show_bug.cgi?id=6137

The 'andn' test shows that we're missing a pattern match to
recognize the xor with -1 constant as a 'not' op.

llvm-svn: 287171
 2016-11-16 22:34:05 +00:00
Sanjay Patel 7f3d51f840 [x86] add fake scalar FP logic instructions to ReplaceableInstrs to save some bytes 
We can replace "scalar" FP-bitwise-logic with other forms of bitwise-logic instructions. 
Scalar SSE/AVX FP-logic instructions only exist in your imagination and/or the bowels of 
compilers, but logically equivalent int, float, and double variants of bitwise-logic 
instructions are reality in x86, and the float variant may be a shorter instruction 
depending on which flavor (SSE or AVX) of vector ISA you have...so just prefer float all 
the time.

This is a preliminary step towards solving PR6137:
https://llvm.org/bugs/show_bug.cgi?id=6137

Differential Revision:
https://reviews.llvm.org/D26712

llvm-svn: 287122
 2016-11-16 17:42:40 +00:00
Sanjay Patel aaf430452b [x86] regenerate checks; NFC 
llvm-svn: 287051
 2016-11-15 23:09:53 +00:00
Craig Topper 9bd6241106 [X86] Remove the Fv packed logical operation alias instructions. Replace them with patterns to the regular instructions. 
This enables execution domain fixing which is why the tests changed.

llvm-svn: 278090
 2016-08-09 03:06:33 +00:00
Sanjay Patel b114fd65fc [x86] enable bitcasted fabs/fneg transforms 
The vector cases don't change because we already have folds in X86ISelLowering
to look through and remove bitcasts.

llvm-svn: 272427
 2016-06-10 20:33:50 +00:00
Sanjay Patel 13d57b94bb [x86] add tests to show current codegen for obscured fneg/fabs 
llvm-svn: 268533
 2016-05-04 19:06:03 +00:00
Sanjay Patel 309c4f93e5 [x86] replace integer logic ops with packed SSE FP logic ops 
If we have an operand to a bitwise logic op that's already in
an XMM register and the result is going to be sent to an XMM
register, then use an SSE logic op to avoid moves between the
integer and vector register files.

Related commits:
http://reviews.llvm.org/rL248395
http://reviews.llvm.org/rL248399
http://reviews.llvm.org/rL248404
http://reviews.llvm.org/rL248409
http://reviews.llvm.org/rL248415

This should solve PR22428:
https://llvm.org/bugs/show_bug.cgi?id=22428

llvm-svn: 251378
 2015-10-27 01:28:07 +00:00
Sanjay Patel 28d1598e5b add FP logic test cases to show current codegen (PR22428) 
llvm-svn: 251370
 2015-10-26 23:52:42 +00:00
Sanjay Patel 1a6534661b [x86] replace integer 'xor' ops with packed SSE FP 'xor' ops when operating on FP scalars 
Turn this:

movd %xmm0, %eax
movd %xmm1, %ecx
xorl %eax, %ecx
movd %ecx, %xmm0

into this:

xorps %xmm1, %xmm0

This is related to, but does not solve:
https://llvm.org/bugs/show_bug.cgi?id=22428

This is an extension of:
http://reviews.llvm.org/rL248395

llvm-svn: 248415
 2015-09-23 18:33:42 +00:00
Sanjay Patel aba37553c4 [x86] replace integer 'or' ops with packed SSE FP 'or' ops when operating on FP scalars 
Turn this:

movd %xmm0, %eax
movd %xmm1, %ecx
orl %eax, %ecx
movd %ecx, %xmm0

into this:

orps %xmm1, %xmm0

This is related to, but does not solve:
https://llvm.org/bugs/show_bug.cgi?id=22428

This is an extension of:
http://reviews.llvm.org/rL248395

llvm-svn: 248409
 2015-09-23 18:19:07 +00:00
Sanjay Patel df2495f331 [x86] replace integer 'and' ops with packed SSE FP 'and' ops when operating on FP scalars 
Turn this:
   movd %xmm0, %eax
   movd %xmm1, %ecx
   andl %eax, %ecx
   movd %ecx, %xmm0

into this:
   andps %xmm1, %xmm0


This is related to, but does not solve:
https://llvm.org/bugs/show_bug.cgi?id=22428

Differential Revision: http://reviews.llvm.org/D13065

llvm-svn: 248395
 2015-09-23 17:00:06 +00:00
Sanjay Patel bab5d6c636 add test file ahead of any functional changes for PR22428 
llvm-svn: 248123
 2015-09-20 15:58:00 +00:00