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Commit Graph

19 Commits

Author SHA1 Message Date
Craig Topper
043ec61ef1 [x86] Change u8imm operands to always print as unsigned. This makes shuffle masks and the like make way more sense.
llvm-svn: 226902
2015-01-23 08:00:59 +00:00
Stephen Lin
3ae734a60c Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion.
This was done with the following sed invocation to catch label lines demarking function boundaries:
    sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll
which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct.

llvm-svn: 186258
2013-07-13 20:38:47 +00:00
Benjamin Kramer
dced131e7e X86: When expanding PCMPGTQ to PCMPGTD we always want to compare the lower halves as unsigned.
Take #2 on fixing PR15977.

llvm-svn: 182486
2013-05-22 17:01:12 +00:00
Benjamin Kramer
6b339bee4e X86: When emulating unsigned PCMPGTQ with PCMPGTD, fix the sign bit for the smaller type.
Otherwise we'll get a mix of signed and unsigned compares.
Fixes PR15977.

llvm-svn: 182364
2013-05-21 09:58:54 +00:00
Benjamin Kramer
aeff9e581b X86: Add an SSE2 lowering for 64 bit compares when pcmpgtq (SSE4.2) isn't available.
This pattern started popping up in vectorized min/max reductions.

llvm-svn: 179797
2013-04-18 21:37:45 +00:00
Benjamin Kramer
e4eabce005 X86: Shave off one shuffle from the pcmpeqq sequence for SSE2 by making use of and commutativity.
llvm-svn: 171064
2012-12-25 13:09:08 +00:00
Benjamin Kramer
2e313ba01d X86: Custom lower <2 x i64> eq and ne when SSE41 is not available.
pcmpeqd, pshufd, pshufd, pand is cheaper than unpack + cmpq, sbbq, cmpq, sbbq + pack.
Small speedup on loop-vectorized viterbi (-march=core2).

llvm-svn: 171063
2012-12-25 12:54:19 +00:00
Manman Ren
2c236a30f6 X86 Peephole: fold loads to the source register operand if possible.
Add more comments and use early returns to reduce nesting in isLoadFoldable.
Also disable folding for V_SET0 to avoid introducing a const pool entry and
a const pool load.

rdar://10554090 and rdar://11873276

llvm-svn: 161207
2012-08-02 19:37:32 +00:00
Manman Ren
78b8d454cc X86 Peephole: fold loads to the source register operand if possible.
Machine CSE and other optimizations can remove instructions so folding
is possible at peephole while not possible at ISel.

This patch is a rework of r160919 and was tested on clang self-host on my local
machine.

rdar://10554090 and rdar://11873276

llvm-svn: 161152
2012-08-02 00:56:42 +00:00
Manman Ren
ceef7c4d9b Revert r160920 and r160919 due to dragonegg and clang selfhost failure
llvm-svn: 160927
2012-07-29 02:44:09 +00:00
Manman Ren
9494d0a2c2 X86 Peephole: fold loads to the source register operand if possible.
Trying to fix the bot by specifying a triple in the failing testing cases.

llvm-svn: 160920
2012-07-28 17:51:24 +00:00
Manman Ren
ea77f9076b X86 Peephole: fold loads to the source register operand if possible.
Machine CSE and other optimizations can remove instructions so folding
is possible at peephole while not possible at ISel.

rdar://10554090 and rdar://11873276

llvm-svn: 160919
2012-07-28 16:48:01 +00:00
Jakob Stoklund Olesen
a027a6d4f2 Enable -sse-domain-fix by default. Now with tests!
llvm-svn: 99954
2010-03-30 22:47:00 +00:00
Dan Gohman
df2896d609 Eliminate more uses of llvm-as and llvm-dis.
llvm-svn: 81290
2009-09-08 23:54:48 +00:00
Chris Lattner
1eeea0d262 add some more check for vector compares.
llvm-svn: 75024
2009-07-08 18:51:25 +00:00
Chris Lattner
c153b998d9 eliminate the v[if]cmp versions of these tests, now that [if]cmp+sext works.
llvm-svn: 74980
2009-07-08 00:49:35 +00:00
Chris Lattner
ea7bd9b484 dag combine sext(setcc) -> vsetcc before legalize. To make this safe,
VSETCC must define all bits, which is different than it was documented
to before.  Since all targets that implement VSETCC already have this
behavior, and we don't optimize based on this, just change the 
documentation.  We now get nice code for vec_compare.ll

llvm-svn: 74978
2009-07-08 00:31:33 +00:00
Chris Lattner
e2435c4f6f add support for legalizing an icmp where the result is illegal (4xi1) but
the input is legal (4 x i32)

llvm-svn: 74964
2009-07-07 23:03:54 +00:00
Chris Lattner
1de1b3155b add a trivial test that vector compares work.
llvm-svn: 74963
2009-07-07 22:51:09 +00:00