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Author SHA1 Message Date
Evan Cheng
ae26b91353 Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit. 
llvm-svn: 123015
 2011-01-07 19:35:30 +00:00
David Greene
e9b2fb7e0d Rename lisp-like functions as suggested by Gabor Greif as loooong time 
ago.  This is both easier to learn and easier to read.

llvm-svn: 123001
 2011-01-07 17:05:37 +00:00
Benjamin Kramer
a842a10fc1 Try to unbreak the arm buildbot. 
llvm-svn: 122999
 2011-01-07 11:35:21 +00:00
Bob Wilson
8341c8971d Add testcases for PR8411 (vget_low and vget_high implemented as shuffles). 
llvm-svn: 122997
 2011-01-07 06:44:14 +00:00
Bob Wilson
22f18a7e94 Add ARM patterns to match EXTRACT_SUBVECTOR nodes. 
Also fix an off-by-one in SelectionDAGBuilder that was preventing shuffle
vectors from being translated to EXTRACT_SUBVECTOR.
Patch by Tim Northover.

The test changes are needed to keep those spill-q tests from testing aligned
spills and restores.  If the only aligned stack objects are spill slots, we
no longer realign the stack frame.  Prior to this patch, an EXTRACT_SUBVECTOR
was legalized by loading from the stack, which created an aligned frame index.
Now, however, there is nothing except the spill slot in the stack frame, so
I added an aligned alloca.

llvm-svn: 122995
 2011-01-07 04:59:04 +00:00
Bob Wilson
d9a324ac11 Fix a comment typo. 
llvm-svn: 122994
 2011-01-07 04:58:58 +00:00
Bob Wilson
bcbb3375dd Change EXTRACT_SUBVECTOR to require a constant index. 
We were never generating any of these nodes with variable indices, and there
was one legalizer function asserting on a non-constant index.  If we ever have
a need to support variable indices, we can add this back again.

llvm-svn: 122993
 2011-01-07 04:58:56 +00:00
Bill Wendling
0bf94c2188 Early exit if we don't have invokes. The 'Unwinds' vector isn't modified unless 
we have invokes, so there is no functionality change here.

llvm-svn: 122990
 2011-01-07 02:54:45 +00:00
Duncan Sands
06444485ee Fix the other problem reported in PR8582. Testcase and patch by 
Nadav Rotem.

llvm-svn: 122983
 2011-01-06 23:45:22 +00:00
Duncan Sands
883391f3f2 Add a testcase for PR8582, which mysteriously fixed itself, in case the problem 
comes back some day.

llvm-svn: 122982
 2011-01-06 23:04:29 +00:00
Eric Christopher
16127008fd Add some fairly duplicated code to let type legalization split illegal 
typed atomics. This will lower exclusively to libcalls at the moment.

llvm-svn: 122979
 2011-01-06 22:28:56 +00:00
Chris Lattner
2fd8a095b1 With Benjamin's recent amazing patches, we should be able to do even better things :) 
llvm-svn: 122978
 2011-01-06 22:25:00 +00:00
Chris Lattner
6430d12360 use isNullValue() to simplify code, add an assert. 
llvm-svn: 122977
 2011-01-06 22:24:29 +00:00
Devang Patel
7cb0e7c2ef Emit 128 bit constant. 
This fixes PR 8913 crash.

llvm-svn: 122971
 2011-01-06 21:39:25 +00:00
Bob Wilson
461eb28678 PR8921: LDM/POP do not support interworking prior to v5t. 
llvm-svn: 122970
 2011-01-06 19:24:41 +00:00
Bob Wilson
f4a821c3d3 Remove extra whitespace. 
llvm-svn: 122969
 2011-01-06 19:24:36 +00:00
Bob Wilson
42b8976610 Fix comment typo. 
llvm-svn: 122968
 2011-01-06 19:24:32 +00:00
Benjamin Kramer
4e31a65344 Add a note from llvmdev, this time with more info. 
llvm-svn: 122966
 2011-01-06 17:35:50 +00:00
Abramo Bagnara
d4c067af6e Fixed parsing of hex floats. 
llvm-svn: 122963
 2011-01-06 16:55:14 +00:00
Rafael Espindola
64814fff0b Correctly disassemble truncated asm. 
Patch by Richard Simth.

llvm-svn: 122962
 2011-01-06 16:48:42 +00:00
Benjamin Kramer
fb2bb22b6f InstCombine: Turn _chk functions into the "unsafe" variant if length and max langth are equal. 
This happens when we take the (non-constant) length from a malloc.

llvm-svn: 122961
 2011-01-06 14:22:52 +00:00
Benjamin Kramer
33e41f4986 EarlyCSE does this now (and GVN always did it). 
llvm-svn: 122960
 2011-01-06 13:19:46 +00:00
Benjamin Kramer
5834b2bab8 InstCombine: If we call llvm.objectsize on a malloc call we can replace it with the size passed to malloc. 
llvm-svn: 122959
 2011-01-06 13:11:05 +00:00
Benjamin Kramer
d5e1c24646 InstCombine: Teach llvm.objectsize folding to look through GEPs. 
llvm-svn: 122958
 2011-01-06 13:07:49 +00:00
Benjamin Kramer
dcff486813 Remove dead code and silence warnings. 
llvm-svn: 122957
 2011-01-06 13:01:02 +00:00
Evan Cheng
1a1771584e Use movups to lower memcpy and memset even if it's not fast (like corei7). 
The theory is it's still faster than a pair of movq / a quad of movl. This
will probably hurt older chips like P4 but should run faster on current
and future Intel processors. rdar://8817010

llvm-svn: 122955
 2011-01-06 07:58:36 +00:00
Chris Lattner
40973baa5f add a note about object size from drystone, add a poorly optimized loop from 179.art. 
llvm-svn: 122954
 2011-01-06 07:41:22 +00:00
Chris Lattner
69ff12968c add a trivial instcombine missed in Dhrystone 
llvm-svn: 122953
 2011-01-06 07:09:23 +00:00
Evan Cheng
cb39cc2164 Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy 
etc. takes an option OptSize. If OptSize is true, it would return
the inline limit for functions with attribute OptSize.

llvm-svn: 122952
 2011-01-06 06:52:41 +00:00
Chris Lattner
83067bc3e7 implement constant folding support for an exotic constant expr: 
ret i64 ptrtoint (i8* getelementptr ([1000 x i8]* @X, i64 1, i64 sub (i64 0, i64 ptrtoint ([1000 x i8]* @X to i64))) to i64)

to "ret i64 1000".  This allows us to correctly compute the trip count
on a loop in PR8883, which occurs with std::fill on a char array.  This
allows us to transform it into a memset with a constant size.

llvm-svn: 122950
 2011-01-06 06:19:46 +00:00
Evan Cheng
70711ea54d Revert r122936. I'll re-implement the change. 
llvm-svn: 122949
 2011-01-06 06:17:53 +00:00
Michael J. Spencer
223074e281 UnitTests/Path: Add magical tests. This will also test identify_magic. 
llvm-svn: 122948
 2011-01-06 05:58:02 +00:00
Michael J. Spencer
2b6edb1efa UnitTests/Path: More ASSERT_NO_ERROR cleanup. 
llvm-svn: 122947
 2011-01-06 05:57:54 +00:00
Cameron Zwarich
246056cbb7 Add the CallInst optimizations that don't involve expanding inline assembly to 
OptimizeInst() so that they can be used on a worklist instruction.

llvm-svn: 122945
 2011-01-06 02:56:42 +00:00
Cameron Zwarich
314d16039a Move the GEP handling in CodeGenPrepare to OptimizeInst(). 
llvm-svn: 122944
 2011-01-06 02:44:52 +00:00
Cameron Zwarich
40cfb75bd7 Split the optimizations in CodeGenPrepare that don't manipulate the iterators 
into a separate function, so that it can be called from a loop using a worklist
rather than a loop traversing a whole basic block.

llvm-svn: 122943
 2011-01-06 02:37:26 +00:00
Jakob Stoklund Olesen
b3e7b27c1f Zap the last two -Wself-assign warnings in llvm. 
Simplify RALinScan::DowngradeRegister with TRI::getOverlaps while we are there.

llvm-svn: 122940
 2011-01-06 01:33:22 +00:00
Jakob Stoklund Olesen
7b1480ff12 Add the SpillPlacement analysis pass. 
This pass precomputes CFG block frequency information that can be used by the
register allocator to find optimal spill code placement.

Given an interference pattern, placeSpills() will compute which basic blocks
should have the current variable enter or exit in a register, and which blocks
prefer the stack.

The algorithm is ready to consume block frequencies from profiling data, but for
now it gets by with the static estimates used for spill weights.

This is a work in progress and still not hooked up to RegAllocGreedy.

llvm-svn: 122938
 2011-01-06 01:21:53 +00:00
Bill Wendling
b3bf7cd562 Fix test to coincide with r122934 change from PR8919. 
llvm-svn: 122937
 2011-01-06 01:09:35 +00:00
Evan Cheng
d425aa5d2a r105228 reduced the memcpy / memset inline limit to 4 with -Os to avoid blowing 
up freebsd bootloader. However, this doesn't make much sense for Darwin, whose
-Os is meant to optimize for size only if it doesn't hurt performance.
rdar://8821501

llvm-svn: 122936
 2011-01-06 01:04:47 +00:00
Evan Cheng
2af40ae781 Avoid zero extend bit test operands to pointer type if all the masks fit in 
the original type of the switch statement key.
rdar://8781238

llvm-svn: 122935
 2011-01-06 01:02:44 +00:00
Bill Wendling
a59afdaec5 PR8919 - LLVM incorrectly generates "_alloca" as the stack probing call. That 
works only on MinGW32. On 64-bit, the function to call is "__chkstk".
Patch by KS Sreeram!

llvm-svn: 122934
 2011-01-06 00:50:34 +00:00
Bill Wendling
fae0dd1afa PR8918 - When used with MinGW64, LLVM generates a "calll __main" at the 
beginning of the "main" function. The assembler complains about the invalid
suffix for the 'call' instruction. The right instruction is "callq __main".
Patch by KS Sreeram!

llvm-svn: 122933
 2011-01-06 00:47:10 +00:00
Cameron Zwarich
eeea9f7113 Stop reallocating SunkAddrs for each basic block. When we move to an instruction 
worklist, the key will need to become std::pair<BasicBlock*, Value*>.

llvm-svn: 122932
 2011-01-06 00:42:50 +00:00
Owen Anderson
ba8ae674d7 Reorder, rename, and document some members to make this easier to follow. 
llvm-svn: 122929
 2011-01-05 23:26:22 +00:00
Evan Cheng
bf92316fab Optimize: 
r1025 = s/zext r1024, 4
  r1026 = extract_subreg r1025, 4
to:
  r1026 = copy r1024

llvm-svn: 122925
 2011-01-05 23:06:49 +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
0caa2500c0 silence more self assignment warnings. 
llvm-svn: 122920
 2011-01-05 22:26:52 +00:00
Jakob Stoklund Olesen
ce25984bae Add a hidden command line option to display edge bundle graphs as they are 
calculated.

llvm-svn: 122912
 2011-01-05 21:50:24 +00:00
Jakob Stoklund Olesen
bd9910dbe2 Silence a warning from non-standard warning avoidance code. 
llvm-svn: 122911
 2011-01-05 21:50:21 +00:00