Commit Graph

18 Commits

Author SHA1 Message Date
Evan Cheng
4760ff0763 Use a bigger hammer to fix PR11314 by disabling the "forcing two-address
instruction lower optimization" in the pre-RA scheduler.

The optimization, rather the hack, was done before MI use-list was available.
Now we should be able to implement it in a better way, perhaps in the
two-address pass until a MI scheduler is available.

Now that the scheduler has to backtrack to handle call sequences. Adding
artificial scheduling constraints is just not safe. Furthermore, the hack
is not taking all the other scheduling decisions into consideration so it's just
as likely to pessimize code. So I view disabling this optimization goodness
regardless of PR11314.

llvm-svn: 144267
2011-11-10 07:43:16 +00:00
Jakob Stoklund Olesen
9380d5daff Kill and collapse outstanding DomainValues.
DomainValues that are only used by "don't care" instructions are now
collapsed to the first possible execution domain after all basic blocks
have been processed.  This typically means the PS domain on x86.

For example, the vsel_i64 and vsel_double functions in sse2-blend.ll are
completely collapsed to the PS domain instead of containing a mix of
execution domains created by isel.

llvm-svn: 144037
2011-11-07 23:08:21 +00:00
Jakob Stoklund Olesen
b53be3a67d 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
Jakob Stoklund Olesen
32cf19caa6 Fix register-dependent X86 tests.
llvm-svn: 128867
2011-04-05 00:32:44 +00:00
Chris Lattner
68d9fae34e fix PR9210 by implementing some type legalization logic for
vector fp conversions.

llvm-svn: 125482
2011-02-14 06:30:45 +00:00
Chris Lattner
9ba0a83f2b fix a missing shuffle pattern, PR9009. Patch by Artiom Myaskouvskey!
llvm-svn: 124102
2011-01-24 03:42:46 +00:00
Chris Lattner
3ef9db5cd4 fix PR8900, a shuffle miscompilation. Patch by Nadav Rotem!
llvm-svn: 122921
2011-01-05 22:28:46 +00:00
Chris Lattner
5f911e6fe9 merge a bunch of shuffle tests into sse2.ll
llvm-svn: 112398
2010-08-29 03:19:04 +00:00
Evan Cheng
5ace6fffac Turning off post-ra scheduling for x86. It isn't a consistent win.
llvm-svn: 98810
2010-03-18 06:55:42 +00:00
Dan Gohman
44e25ed254 Don't enable the post-RA scheduler on x86 except at -O3. In its
current form, it is too expensive in compile time.

llvm-svn: 90781
2009-12-07 19:04:31 +00:00
Evan Cheng
aa03d9926d Update tests for 84931.
llvm-svn: 84932
2009-10-23 05:58:34 +00:00
David Goodwin
82c1dd9754 Allow the target to select the level of anti-dependence breaking that should be performed by the post-RA scheduler. The default is none.
llvm-svn: 84911
2009-10-22 23:19:17 +00:00
Evan Cheng
eb82c3743a Turn on post-alloc scheduling for x86.
llvm-svn: 84431
2009-10-18 19:57:27 +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
Eli Friedman
d61a2e81bc Fix test on Linux.
llvm-svn: 79140
2009-08-15 21:28:17 +00:00
Chris Lattner
d910c3a30e implement support for CHECK-NEXT: in filecheck.
llvm-svn: 79123
2009-08-15 18:32:21 +00:00
Chris Lattner
adc768c073 convert to filecheck.
llvm-svn: 79117
2009-08-15 17:28:09 +00:00
Chris Lattner
27345be0c7 rename this test to sse2.ll
llvm-svn: 79116
2009-08-15 17:24:09 +00:00