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4488 Commits

Author SHA1 Message Date
Devang Patel
deafefabae A loop may be unswitched multiple times. Reconstruct dom info. at the end. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55806 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 22:43:59 +00:00
Devang Patel
027bb92541 Initialize loop data first. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55792 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 20:36:36 +00:00
Devang Patel
10b359ccb6 Do not unswitch if the function notes say we're optimizing this function for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55786 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 18:55:13 +00:00
Andrew Lenharth
eb50479714 try to seperate the mechanism into something others can use 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55785 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 18:51:26 +00:00
Dale Johannesen
53bfbbccbf Add intrinsic forms of pow and exp2. The non-intrinsic 
forms remain to handle older IR files, but will go away soon.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55781 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 18:30:46 +00:00
Dan Gohman
ae73dc1448 Tidy up several unbeseeming casts from pointer to intptr_t. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 17:05:41 +00:00
Andrew Lenharth
ef7803217a cleanup as per Duncan's review 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55766 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-04 14:34:22 +00:00
Devang Patel
7bbb4339f9 Update inline threshold for current function if the notes say, optimize for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55745 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 23:06:09 +00:00
Owen Anderson
0c7f91cf84 Fix a bug that prevented PRE from applying in some cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55744 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 23:06:07 +00:00
Andrew Lenharth
cf996d4b56 Initial version of a Partial Specialization IPO pass. It triggers a couple hundred times on 176.gcc. I don't know the performance impact yet, the heuristic is quite simple still. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55734 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 21:00:28 +00:00
Devang Patel
7946e7b8a4 Fix typo in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55720 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 20:25:40 +00:00
Devang Patel
79cca4f49f Add parentheses to make code more readable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55717 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 19:57:15 +00:00
Devang Patel
3fb68373c4 Fix comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55716 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 19:52:17 +00:00
Devang Patel
22ec199fa0 Add custom inliner that handles only functions that are marked as always_inline. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55713 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 18:50:53 +00:00
Devang Patel
67243399dd Handle "always inline" note during inline cost analysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55712 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 18:47:45 +00:00
Devang Patel
5e06010462 Check noinline note and ignore other notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55711 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 18:46:35 +00:00
Devang Patel
910c120a7c Handle "noinline" note inside the simple inliner. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55708 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 18:10:21 +00:00
Nick Lewycky
23c04309fb Don't apply this transform to vectors. Fixes PR2756. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55690 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 06:24:21 +00:00
Devang Patel
e925ccc553 Add additional check to ensure that iv is canonicalized. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55682 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 00:29:13 +00:00
Devang Patel
a9348dc7ac Check iteration count. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55680 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 00:10:56 +00:00
Devang Patel
c72139134c While removing PHI, use basicblock to identify incoming value. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55678 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 00:02:42 +00:00
Devang Patel
cb7f483d8c s/FP_AlwaysInline/FN_NOTE_AlwaysInline/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55676 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-02 22:43:57 +00:00
Devang Patel
108f92e376 If all IV uses are extending integer IV then change the type of IV itself, if possible. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55674 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-02 22:18:08 +00:00
Devang Patel
691e52445e respect inline=never and inline=always notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55673 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-02 22:16:13 +00:00
Duncan Sands
3cd652d530 Add a small pass that sets the readnone/readonly 
attributes on functions, based on the result of
alias analysis.  It's not hardwired to use
GlobalsModRef even though this is the only (AFAIK)
alias analysis that results in this pass actually
doing something.  Enable as follows:
  opt ... -globalsmodref-aa -markmodref ...
Advantages of this pass: (1) records the result
of globalsmodref in the bitcode, meaning it is
available for use by later passes (currently
the pass manager isn't smart enough to magically
make an advanced alias analysis available to all
later passes), which may expose more optimization
opportunities; (2) hopefully speeds up compilation
when code is optimized twice, for example when a
file is compiled to bitcode, then later LTO is done
on it: marking functions readonly/readnone when
producing the initial bitcode should speed up alias
analysis during LTO; (3) good for discovering that
globalsmodref doesn't work very well :)
Not currently turned on by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55604 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-01 11:40:11 +00:00
Devang Patel
18bb2788a0 Do not apply the transformation if the target does not support DestTy natively. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55433 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-27 20:55:23 +00:00
Devang Patel
541532724e Fix typos and whitespaces. Other cosmetic changes based on feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55424 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-27 17:50:18 +00:00
Owen Anderson
516eb1c139 Put a heuristic in place to prevent GVN from falling into bad cases with massively complicated CFGs. 
This speeds up a particular testcase from 12+ hours to 5 seconds with little perceptible loss of quality.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55391 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-26 22:07:42 +00:00
Devang Patel
a0b3909d43 If IV is used in a int-to-float cast inside the loop then try to eliminate the cast operation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55374 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-26 17:57:54 +00:00
Chris Lattner
7eb01bfc16 improve encapsulation of the BBExecutable set. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55271 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-23 23:39:31 +00:00
Chris Lattner
cf712dee93 Switch an assortment of maps, sets and vectors to more efficient versions, 
patch contributed by m-s!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55270 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-23 23:36:38 +00:00
Chris Lattner
944fac71e0 Switch the asmprinter (.ll) and all the stuff it requires over to 
use raw_ostream instead of std::ostream.  Among other goodness,
this speeds up llvm-dis of kc++ with a release build from 0.85s
to 0.49s (88% faster).

Other interesting changes:
 1) This makes Value::print be non-virtual.
 2) AP[S]Int and ConstantRange can no longer print to ostream directly, 
    use raw_ostream instead.
 3) This fixes a bug in raw_os_ostream where it didn't flush itself 
    when destroyed.
 4) This adds a new SDNode::print method, instead of only allowing "dump".


A lot of APIs have both std::ostream and raw_ostream versions, it would
be useful to go through and systematically anihilate the std::ostream 
versions.

This passes dejagnu, but there may be minor fallout, plz let me know if
so and I'll fix it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55263 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-23 22:23:09 +00:00
Chris Lattner
3793325cb3 Add a new trivial -inst-namer pass which makes it possible to diff the 
before/after effects of a pass, crazy!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55230 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-23 06:07:02 +00:00
Chris Lattner
88e6dc8bf1 Fix PR2423 by checking all indices for out of range access, not only 
indices that start with an array subscript.  x->field[10000] is just 
as bad as (*X)[14][10000].


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55226 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-23 05:21:06 +00:00
Chris Lattner
2dba6a1bdb consolidate DenseMapInfo implementations, and add one for std::pair. 
Patch contributed by m-s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55167 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-22 05:08:25 +00:00
Nick Lewycky
5d52c4501a Revert r54876 r54877 r54906 and r54907. Evan found that these caused a 20% 
slowdown in bzip2.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55113 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-21 05:56:10 +00:00
Evan Cheng
ab5d5e360e Silence a compiler warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55087 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-20 23:36:48 +00:00
Mon P Wang
4f5ca2cf80 Fixed shuffle optimizations to handle non power of 2 vectors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55035 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-20 02:23:25 +00:00
Chris Lattner
7de3b5db26 don't use the result of WriteAsOperand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54979 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-19 04:45:19 +00:00
Nick Lewycky
e86389dd2a Make this comment clearer. Instead of using an ambiguous ~ (not) on an icmp 
predicate, swap the order of the operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54907 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 20:02:02 +00:00
Nick Lewycky
91a0f78265 Consider the case where xor by -1 and xor by 128 have been combined already to 
produce an xor by 127.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54906 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 19:58:24 +00:00
Gordon Henriksen
5eca075b74 Rename some GC classes so that their roll will hopefully be clearer. 
In particular, Collector was confusing to implementors. Several
thought that this compile-time class was the place to implement
their runtime GC heap. Of course, it doesn't even exist at runtime.
Specifically, the renames are:

  Collector               -> GCStrategy
  CollectorMetadata       -> GCFunctionInfo
  CollectorModuleMetadata -> GCModuleInfo
  CollectorRegistry       -> GCRegistry
  Function::getCollector  -> getGC (setGC, hasGC, clearGC)

Several accessors and nested types have also been renamed to be
consistent. These changes should be obvious.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54899 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 18:44:35 +00:00
Evan Cheng
ee2aa85f44 Revert 54821. It's miscompiling 252.eon and 447.dealII 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54878 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 08:07:31 +00:00
Nick Lewycky
cbe23e33ba I found a better place for this optz'n. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54877 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 07:54:14 +00:00
Nick Lewycky
1b344bc986 Xor'ing both sides of icmp by sign-bit is equivalent to swapping signedness of 
the predicate.

Also, make this optz'n apply in more cases where it's safe to do so.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54876 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 07:34:14 +00:00
Chris Lattner
fad86b003a Rework the routines that convert AP[S]Int into a string. Now, instead of 
returning an std::string by value, it fills in a SmallString/SmallVector
passed in.  This significantly reduces string thrashing in some cases.

More specifically, this:
 - Adds an operator<< and a print method for APInt that allows you to 
   directly send them to an ostream.
 - Reimplements APInt::toString to be much simpler and more efficient
   algorithmically in addition to not thrashing strings quite as much.

This speeds up llvm-dis on kc++ by 7%, and may also slightly speed up the
asmprinter.  This also fixes a bug I introduced into the asmwriter in a
previous patch w.r.t. alias printing.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54873 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-17 07:19:36 +00:00
Owen Anderson
3688f268cb Remove GCSE, ValueNumbering, and LoadValueNumbering. These have been deprecated for almost a year; it's finally time for them to go away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-15 21:31:02 +00:00
Devang Patel
35115f92e4 Reapply 54786. Add overflow and number of mantissa bits checks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54821 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-15 21:21:34 +00:00
Evan Cheng
21066541ae Revert 54786. It's not checking for overflows, etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54813 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-15 08:12:11 +00:00
Chris Lattner
2806dffc73 use smallvector instead of vector for a couple worklists. This speeds up instcombine 
by ~10% on some testcases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54811 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-15 04:03:01 +00:00
Bill Wendling
7a7cf6b984 Temporarily revert r54792. It's causing an ICE during bootstrapping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54804 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 23:05:24 +00:00
Devang Patel
1df183f554 Use DenseMap. Patch by Pratik Solanki. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54792 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 21:31:10 +00:00
Devang Patel
79ceb4463e If IV is used in a int-to-float cast inside the loop then try to eliminate the cast opeation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54786 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 20:58:31 +00:00
Dan Gohman
a8c763b307 Use empty() instead of begin() == end(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54780 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 18:13:49 +00:00
Matthijs Kooijman
c1f1d46f00 Replace two for loops with while(!X->use_empty()) loops. This prevents 
invalidating the iterator by deleting the current use. This fixes a segfault on
64 bit linux reported in PR2675.

Also remove an unneeded if.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54778 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-14 15:03:05 +00:00
Dan Gohman
a60832b018 Fix a bogus srem rule - a negative value srem'd by a power-of-2 
can have a non-negative result; for example, -16%16 is 0. Also,
clarify the related comments. This fixes PR2670.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54767 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-13 23:12:35 +00:00
Dan Gohman
2edeb63ece Fix SCCP's handling of struct value loads and stores. SCCP doesn't 
track individual leaf values in such cases, so it needs to treat
struct values as normal values in this case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54760 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-13 21:22:48 +00:00
Devang Patel
c677de2713 Rename. s/FindIVForUser/FindIVUserForCond/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54754 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-13 20:31:11 +00:00
Devang Patel
d16aba22c9 Check sign to detect overflow before changing compare stride. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54710 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-13 02:05:14 +00:00
Bill Wendling
f9e67aca52 Remove tabs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54707 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-12 23:15:44 +00:00
Chris Lattner
b8cd4d3d49 Implement support for simplifying vector comparisons by 0.0 and 1.0 like we 
do for scalars.  Patch contributed by Nicolas Capens

This also generalizes the previous xforms to work on long double, now that 
isExactlyValue works for long double.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54653 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-11 22:06:05 +00:00
Eric Christopher
7a61d701c0 Have IRBuilder take a template argument on whether or not to preserve 
names. This can save a lot of allocations if you aren't going to be
looking at the output.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54546 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-08 19:39:37 +00:00
Matthijs Kooijman
7d942001fa Let SRETPromotion properly preserve the function name instead of (implicitly) 
postfixing it with a number.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54468 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-07 16:01:23 +00:00
Matthijs Kooijman
a7bab2c81c Fix SRETPromotion, it was generating functions without returns statements since 
r53941 (but this was not noticed due to the lack of a basic test for
SRETPromotion). 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54467 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-07 15:58:09 +00:00
Matthijs Kooijman
81ec2486b3 Add some debug output to SRETPromotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54464 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-07 15:14:04 +00:00
Dan Gohman
4ce9627e97 Fix a shufflevector instcombine that was emitting invalid masks indices 
when it meant to be emitting undef indices.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54417 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:17:32 +00:00
Evan Cheng
f5e25f32c7 Fix PR2355: bug in ChangeCompareStride. When the loop termination compare is the only use of its iv stride, the stride can be eliminated by moving it to another stride. If the scale is negative, swap the predicate instead of using a inverse predicate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54415 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:04:43 +00:00
Chris Lattner
46bbad217b optimize a common idiom generated by clang for bitfield access, PR2638. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54408 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 07:35:52 +00:00
Chris Lattner
5af5f463e1 Zap sitofp/fptoui pairs. In all cases when the sign difference 
matters, the result is undefined anyway.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54396 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 05:13:06 +00:00
Nick Lewycky
b30591ec64 Reinstate this optimization, but without the miscompile. Thanks to Bill for 
tracking down that this was breaking llvm-gcc bootstrap on Linux.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54394 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 04:54:03 +00:00
Dan Gohman
5a6c448a7e Pass the computed iteration count value to RewriteLoopExitValues 
instead of having it call getIterationCount again.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54380 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 22:34:21 +00:00
Bill Wendling
021507be82 Revert r53282. This was causing a miscompile on Linux. Also, the transformation 
looks bogus. Please see PR2629 for details on why this is breaking things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54372 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 21:23:45 +00:00
Dan Gohman
8f613f30a7 Trim #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54350 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 15:32:23 +00:00
Duncan Sands
58921feaa9 Fix comment typos. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54266 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-01 12:23:49 +00:00
Nate Begeman
5bc1ea0736 Add vector shifts to the IR, patch by Eli Friedman. 
CodeGen & Clang work coming next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54161 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-29 15:49:41 +00:00
Matthijs Kooijman
75cf9cc527 Add -unroll-allow-partial command line option that enabled the loop unroller to 
partially unroll a loop when fully unrolling would not fit under the threshold.

Patch by Mikael Lepistö.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54160 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-29 13:21:23 +00:00
Matthijs Kooijman
477f5a2f11 Restructure ArgumentPromotion a bit. Instead of just having a single boolean 
that says "unconditional loads from this argument are safe", we now keep track
of the safety per set of indices from which loads happen. This prevents
ArgPromotion from promoting loads that aren't really valid. As an added effect,
this will now disregard the the type of the indices passed to a GEP, so
"load GEP %A, i32 1" and "load GEP %A, i64 1" will result in a single argument,
not two.

This fixes PR2598, for which a testcase has been added as well.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54159 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-29 10:00:13 +00:00
Owen Anderson
80e051dfde Don't remove volatile loads. Thanks to Duncan for noticing this one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54144 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-28 20:52:42 +00:00
Owen Anderson
8aa895b19a Add support for eliminating stores that store the same value that was just loaded. 
This fixes PR2599.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54133 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-28 16:14:26 +00:00
Dan Gohman
475871a144 Rename SDOperand to SDValue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54128 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-27 21:46:04 +00:00
Dan Gohman
3eee6542f5 Put the LICM of constant GlobalVariables, introduced in r53945, under a 
command-line option, and disable it by default. It introduced performance
regressions because CodeGen is currently not able to remat such loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53997 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-24 23:57:25 +00:00
Chris Lattner
967948b4e2 "Allow LICM to sink or lift loads from constant memory. Also add a test 
case for this.

This allows instructions like loads from global variables declared to
be constant to be moved out of loops."

Patch by Stefanus Du Toit!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53945 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-23 05:06:28 +00:00
Dan Gohman
fc74abfba5 Enable first-class aggregates support. 
Remove the GetResultInst instruction. It is still accepted in LLVM assembly
and bitcode, where it is now auto-upgraded to ExtractValueInst. Also, remove
support for return instructions with multiple values. These are auto-upgraded
to use InsertValueInst instructions.

The IRBuilder still accepts multiple-value returns, and auto-upgrades them
to InsertValueInst instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53941 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-23 00:34:11 +00:00
Dan Gohman
7375fbcbf2 Fix a bug in LSR's dead-PHI cleanup. If a PHI has a def-use chain that 
leads into a cycle involving a different PHI, LSR got stuck running
around that cycle looking for the original PHI. To avoid this, keep
track of visited PHIs and stop searching if we see one more than once.
This fixes PR2570.


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 2008-07-21 21:45:02 +00:00
Duncan Sands
6c4d8e3ee4 Supress a gcc-4.3 warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53771 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-18 21:06:02 +00:00
Owen Anderson
e98c54c47c Make PRE actually handle critical edges (by splitting them). Confirmed that bootstrap passes with this change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53762 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-18 18:03:38 +00:00
Owen Anderson
cfa94198d5 Reapply r53735. My last patch fixed the failures Dan observed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53761 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-18 17:49:43 +00:00
Owen Anderson
3ecaf1b339 Add some checks that got lost in the shuffle. This fixes 464.h264ref. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53760 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-18 17:46:41 +00:00
Dan Gohman
79c23effe2 Revert r53735. It broke SPEC 464.h264ref. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53757 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-18 16:44:49 +00:00
Owen Anderson
f7d3ecf091 Use MergeBlockIntoPredecessor to simplify some code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53735 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 20:00:46 +00:00
Owen Anderson
11f2ec8eb5 Make MergeBlockIntoPredecessor more aggressive when the same successor appears 
more than once.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53731 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 19:42:29 +00:00
Owen Anderson
c2b856e5b4 Enable PRE. My last batch of changes fixed the miscompile. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53730 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 19:41:00 +00:00
Matthijs Kooijman
bc1f989e3c Make GlobalOpt preserve address spaces when scalar replacing aggregate globals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53716 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 11:59:53 +00:00
Chris Lattner
d137ab4783 Fix PR2553 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53715 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 06:07:20 +00:00
Evan Cheng
066fcf8628 Inliner tweak. Function calls should cost more than one instruction! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53712 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 01:31:49 +00:00
Owen Anderson
b31b06d04b Factor MergeBlockIntoPredecessor out into BasicBlockUtils. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53705 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-17 00:01:40 +00:00
Owen Anderson
5d0af038a7 There's no need to iterate block merging and PRE. In fact, iterating the latter 
could cause problems for memdep when it breaks critical edges.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53691 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-16 17:52:31 +00:00
Matthijs Kooijman
780ae5e179 Redo InstCombiner::visitExtractValueInst. Instead of using the (complicate) 
FindInsertedValue, it now performs a number of simple transformations that
should result in the same effect when applied iteratively.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53673 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-16 12:55:45 +00:00
Evan Cheng
be8efa54b6 Fix PR2296. Do not transform x86_sse2_storel_dq into a full-width store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53666 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-16 07:28:14 +00:00
Owen Anderson
2b4f7bbd49 Revert this, as it seems to still be broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53627 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-15 17:59:02 +00:00