Commit Graph

35235 Commits

Author SHA1 Message Date
Duncan Sands
ca0ed74485 Eliminate the remaining uses of getTypeSize. This
should only effect x86 when using long double.  Now
12/16 bytes are output for long double globals (the
exact amount depends on the alignment).  This brings
globals in line with the rest of LLVM: the space
reserved for an object is now always the ABI size.
One tricky point is that only 10 bytes should be
output for long double if it is a field in a packed
struct, which is the reason for the additional
argument to EmitGlobalConstant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43688 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-05 00:04:43 +00:00
Owen Anderson
83430bce1d Another step of stronger PHI elimination down.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43684 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 22:33:26 +00:00
Gordon Henriksen
bd76d66194 Deleting -emitbitcode option which did nothing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43683 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 20:28:31 +00:00
Chris Lattner
2e5d07e3ea fix typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43682 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 19:42:13 +00:00
Chris Lattner
fe6575c2bf Fix PR1761 by not printing (rip) suffix when in -static mode.
Evan, please review this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43680 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 19:23:28 +00:00
Gordon Henriksen
873390ee57 Validation fix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43679 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 18:17:58 +00:00
Gordon Henriksen
23a8ce5b95 Typo fix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43678 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 18:14:08 +00:00
Gordon Henriksen
75ff18ed2b Completing Passes.html with the exception of -emitbitcode, which should be
removed. This document could still stand for significant improvement:

  * Editing the pass descriptions; most were lifted with minimal editing from
    comments. Although implementation details were elided, many of the were not
    written for the audience that would be interested in this document.
  * More "before and after" examples.
  * More implicit dependency details. (Perhaps listing transforms in
    -std-compile-opts order would help alleviate this.)
  * Adding documentation for how to invoke passes programmatically.
  * Rearranging the document into a more logical taxonomy. For instance, putting
    profiling passes together.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43677 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 18:10:18 +00:00
Nick Lewycky
f4c164c2b5 Fix crash before main on ppc/linux with static constructors. PR1771
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43676 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 17:32:10 +00:00
Gordon Henriksen
e626bbe4b5 Fix a validation error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43675 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 16:17:00 +00:00
Gordon Henriksen
c86b67742a Finishing initial docs for all transformations in Passes.html.
Also cleaned up some comments in source files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43674 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 16:15:04 +00:00
Gordon Henriksen
5544e64765 Removing a dead reference from LLVM.xcodeproj.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43673 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 16:12:17 +00:00
Duncan Sands
3cb3650a27 Change uses of getTypeSize to getABITypeSize, getTypeStoreSize
or getTypeSizeInBits as appropriate in ScalarReplAggregates.
The right change to make was not always obvious, so it would
be good to have an sroa guru review this.  While there I noticed
some bugs, and fixed them: (1) arrays of x86 long double have
holes due to alignment padding, but this wasn't being spotted
by HasStructPadding (renamed to HasPadding).  The same goes
for arrays of oddly sized ints.  Vectors also suffer from this,
in fact the problem for vectors is much worse because basic
vector assumptions seem to be broken by vectors of type with
alignment padding.   I didn't try to fix any of these vector
problems.  (2) The code for extracting smaller integers from
larger ones (in the "int union" case) was wrong on big-endian
machines for integers with size not a multiple of 8, like i1.
Probably this is impossible to hit via llvm-gcc, but I fixed
it anyway while there and added a testcase.  I also got rid of
some trailing whitespace and changed a function name which
had an obvious typo in it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43672 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 14:43:57 +00:00
Evan Cheng
9aeaf7593b If an interval is being undone clear its preference as well since the source interval may have been undone as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43670 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 08:32:21 +00:00
Chris Lattner
03e6c7091e Fix PR1763 by allowing the 'q' constraint to work with 64-bit
regs on x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43669 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 06:51:12 +00:00
Chris Lattner
0647ebf1dc Disable tail duplication of call instructions. The cost
metric is way off for these in general, and this works around
buggy code like that in PR1764.  we'll see if there is a big
performance impact of this.  If so, I'll revert it tomorrow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43668 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-04 06:37:55 +00:00
Chris Lattner
e719831b1c finish the 'Memory in LLVM' section
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43667 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-03 22:22:30 +00:00
Chris Lattner
00c992dde0 hack and slash the first 20% of chapter seven.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43663 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-03 08:55:29 +00:00
Evan Cheng
c92da3882e There are times when the coalescer would not coalesce away a copy but the copy
can be eliminated by the allocator is the destination and source targets the
same register. The most common case is when the source and destination registers
are in different class. For example, on x86 mov32to32_ targets GR32_ which
contains a subset of the registers in GR32.

The allocator can do 2 things:
1. Set the preferred allocation for the destination of a copy to that of its source.
2. After allocation is done, change the allocation of a copy destination (if
   legal) so the copy can be eliminated.

This eliminates 443 extra moves from 403.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43662 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-03 07:20:12 +00:00
Dan Gohman
111c4f897e Add std:: to sort calls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43652 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 22:24:01 +00:00
Dan Gohman
b61f2f061f Change illegal uses of ++ to uses of STLExtra.h's next function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43651 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 22:22:02 +00:00
Ted Kremenek
24384d1d1e Added overloaded version of Deserializer::ReadOwnedPtr which allows
the target pointer to be passed by reference.  This can result in less
typing, as the object to be deserialized can be inferred from the
argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43647 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 18:04:20 +00:00
Evan Cheng
a9d641e574 Unbreak tailcall opt.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43646 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 17:45:40 +00:00
Evan Cheng
deb36bd9d4 Add run line.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43645 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 17:36:58 +00:00
Evan Cheng
7277a7d031 One more extract_subreg coalescing bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43644 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 17:35:08 +00:00
Chris Lattner
253945899b add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43642 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 17:04:20 +00:00
Duncan Sands
e414cdacb4 Fix a thinko.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43639 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 15:18:06 +00:00
Neil Booth
e3d936ac9c Remove some unnecessary C-style statics.
Restore an assertion that arithmetic can be performed on this format.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43638 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 15:10:05 +00:00
Chris Lattner
b5d81b3e66 fix typos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43637 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 05:54:25 +00:00
Chris Lattner
58f2c874d3 Finish chapter 6, and add a spiffy demo that shows off the language.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43636 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 05:42:52 +00:00
Owen Anderson
1ef14f6e76 VAArgInst does, in fact, read memory.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43633 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 04:01:21 +00:00
Hartmut Kaiser
f2af25b2c1 Updated VC++ build system
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43631 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 01:44:08 +00:00
Evan Cheng
9df7dc52e8 Missing a getNumOperands check.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43630 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-02 01:26:22 +00:00
Neil Booth
43a4b28e94 Add back line whose removal somehow crept into prior patch
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43627 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 22:51:07 +00:00
Neil Booth
ee7ae384f5 When converting to integer, do bit manipulations in the destination
memory rather than in a copy of the APFloat.  This avoids problems
when the destination is wider than our significand and is cleaner.

Also provide deterministic values in all cases where conversion
fails, namely zero for NaNs and the minimal or maximal value
respectively for underflow or overflow.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43626 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 22:43:37 +00:00
Ted Kremenek
ff37ccc570 Removed ReadVal from SerializeTrait<T>, and also removed it from
Deserializer.

There were issues with Visual C++ barfing when instantiating
SerializeTrait<T> when "T" was an abstract class AND
SerializeTrait<T>::ReadVal was *never* called:

template <typename T>
struct SerializeTrait {
 <SNIP>
  static inline T ReadVal(Deserializer& D) { T::ReadVal(D); }
 <SNIP>
};

Visual C++ would complain about "T" being an abstract class, even
though ReadVal was never instantiated (although one of the other
member functions were).

Removing this from the trait is not a big deal.  It was used hardly
ever, and users who want "read-by-value" deserialization can simply
call the appropriate methods directly instead of relying on
trait-based-dispatch.  The trait dispatch for
serialization/deserialization is simply sugar in many cases (like this
one).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43624 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 22:23:34 +00:00
Duncan Sands
514ab348fd Executive summary: getTypeSize -> getTypeStoreSize / getABITypeSize.
The meaning of getTypeSize was not clear - clarifying it is important
now that we have x86 long double and arbitrary precision integers.
The issue with long double is that it requires 80 bits, and this is
not a multiple of its alignment.  This gives a primitive type for
which getTypeSize differed from getABITypeSize.  For arbitrary precision
integers it is even worse: there is the minimum number of bits needed to
hold the type (eg: 36 for an i36), the maximum number of bits that will
be overwriten when storing the type (40 bits for i36) and the ABI size
(i.e. the storage size rounded up to a multiple of the alignment; 64 bits
for i36).

This patch removes getTypeSize (not really - it is still there but
deprecated to allow for a gradual transition).  Instead there is:

(1) getTypeSizeInBits - a number of bits that suffices to hold all
values of the type.  For a primitive type, this is the minimum number
of bits.  For an i36 this is 36 bits.  For x86 long double it is 80.
This corresponds to gcc's TYPE_PRECISION.

(2) getTypeStoreSizeInBits - the maximum number of bits that is
written when storing the type (or read when reading it).  For an
i36 this is 40 bits, for an x86 long double it is 80 bits.  This
is the size alias analysis is interested in (getTypeStoreSize
returns the number of bytes).  There doesn't seem to be anything
corresponding to this in gcc.

(3) getABITypeSizeInBits - this is getTypeStoreSizeInBits rounded
up to a multiple of the alignment.  For an i36 this is 64, for an
x86 long double this is 96 or 128 depending on the OS.  This is the
spacing between consecutive elements when you form an array out of
this type (getABITypeSize returns the number of bytes).  This is
TYPE_SIZE in gcc.

Since successive elements in a SequentialType (arrays, pointers
and vectors) need to be aligned, the spacing between them will be
given by getABITypeSize.  This means that the size of an array
is the length times the getABITypeSize.  It also means that GEP
computations need to use getABITypeSize when computing offsets.
Furthermore, if an alloca allocates several elements at once then
these too need to be aligned, so the size of the alloca has to be
the number of elements multiplied by getABITypeSize.  Logically
speaking this doesn't have to be the case when allocating just
one element, but it is simpler to also use getABITypeSize in this
case.  So alloca's and mallocs should use getABITypeSize.  Finally,
since gcc's only notion of size is that given by getABITypeSize, if
you want to output assembler etc the same as gcc then getABITypeSize
is the size you want.

Since a store will overwrite no more than getTypeStoreSize bytes,
and a read will read no more than that many bytes, this is the
notion of size appropriate for alias analysis calculations.

In this patch I have corrected all type size uses except some of
those in ScalarReplAggregates, lib/Codegen, lib/Target (the hard
cases).  I will get around to auditing these too at some point,
but I could do with some help.

Finally, I made one change which I think wise but others might
consider pointless and suboptimal: in an unpacked struct the
amount of space allocated for a field is now given by the ABI
size rather than getTypeStoreSize.  I did this because every
other place that reserves memory for a type (eg: alloca) now
uses getABITypeSize, and I didn't want to make an exception
for unpacked structs, i.e. I did it to make things more uniform.
This only effects structs containing long doubles and arbitrary
precision integers.  If someone wants to pack these types more
tightly they can always use a packed struct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43620 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 20:53:16 +00:00
Duncan Sands
d0561900f3 Don't barf on empty basic blocks. Do not rely on assert
doing something - this needs to work for release builds
too.  I chose to just abort rather than following the
fancy logic of abortIfBroken, because (1) it is a pain
to do otherwise, and (2) nothing is going to work if the
module is this broken.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43611 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 10:50:26 +00:00
Bill Wendling
d03a6a9242 Silence a warning saying that the variables always resolve to "true" in an
expression.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43610 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 09:38:19 +00:00
Bill Wendling
0d642871f5 Silence, accersed warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43609 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 08:51:44 +00:00
Bill Wendling
651dfd1ff8 Get rid of compilation warning during release builds
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43608 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 08:24:40 +00:00
Chris Lattner
c9d5d2c548 Add the start of chapter 6, still much to go.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43607 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 06:49:54 +00:00
Evan Cheng
0547bab214 - Coalesce extract_subreg when both intervals are relatively small.
- Some code clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43606 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 06:22:48 +00:00
Owen Anderson
7ebba512c3 Fix test/Transforms/DeadStoreElimination/PartialStore.ll, which had been
silently failing because of an incorrect run line for some time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43605 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 05:29:16 +00:00
Chris Lattner
b5c91641b5 remove verifier command line option: this should be part of the API, not
a command line optn.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43603 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 04:43:13 +00:00
Chris Lattner
269f80c71b add a broken gcc version, thanks to P. Durante for pointing this out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43602 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 04:20:16 +00:00
Owen Anderson
765d64501c Now with less tabs!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43601 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 03:54:23 +00:00
Dale Johannesen
df17df864f Test that expand_vector_elt(v2i64) works in 32-bit mode.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43598 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 02:38:24 +00:00
Chris Lattner
e41dcdc964 Fix InstCombine/2007-10-31-StringCrash.ll by removing an obvious
(in hindsight) infinite recursion.  Simplify the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43597 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 02:30:35 +00:00
Chris Lattner
74e012afd3 Fix InstCombine/2007-10-31-RangeCrash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43596 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-01 02:18:41 +00:00