Commit Graph

87613 Commits

Author SHA1 Message Date
Reed Kotler
2c3a4641a7 This patch is needed to make c++ exceptions work for mips16.
Mips16 is really a processor decoding mode (ala thumb 1) and in the same
program, mips16 and mips32 functions can exist and can call each other.

If a jal type instruction encounters an address with the lower bit set, then
the processor switches to mips16 mode (if it is not already in it). If the
lower bit is not set, then it switches to mips32 mode.

The linker knows which functions are mips16 and which are mips32.
When relocation is performed on code labels, this lower order bit is
set if the code label is a mips16 code label.

In general this works just fine, however when creating exception handling
tables and dwarf, there are cases where you don't want this lower order
bit added in.

This has been traditionally distinguished in gas assembly source by using a
different syntax for the label.

lab1:      ; this will cause the lower order bit to be added
lab2=.     ; this will not cause the lower order bit to be added

In some cases, it does not matter because in dwarf and debug tables
the difference of two labels is used and in that case the lower order
bits subtract each other out.

To fix this, I have added to mcstreamer the notion of a debuglabel.
The default is for label and debug label to be the same. So calling
EmitLabel and EmitDebugLabel produce the same result.

For various reasons, there is only one set of labels that needs to be
modified for the mips exceptions to work. These are the "$eh_func_beginXXX" 
labels.

Mips overrides the debug label suffix from ":" to "=." .

This initial patch fixes exceptions. More changes most likely
will be needed to DwarfCFException to make all of this work
for actual debugging. These changes will be to emit debug labels in some
places where a simple label is emitted now.

Some historical discussion on this from gcc can be found at:
http://gcc.gnu.org/ml/gcc-patches/2008-08/msg00623.html
http://gcc.gnu.org/ml/gcc-patches/2008-11/msg01273.html 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170279 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-16 04:00:45 +00:00
Benjamin Kramer
388fc6a988 X86: Add a couple of target-specific dag combines that turn VSELECTS into psubus if possible.
We match the pattern "x >= y ? x-y : 0" into "subus x, y" and two special cases
if y is a constant. DAGCombiner canonicalizes those so we first have to undo the
canonicalization for those cases. The pattern occurs in gzip when the loop
vectorizer is enabled. Part of PR14613.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170273 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 16:47:44 +00:00
Chandler Carruth
d12de95585 Add a corollary test for PR14572. We got this code path correct already.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170271 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 09:31:54 +00:00
Chandler Carruth
19820053fe Relax an overly aggressive assert to fix PR14572.
The alloca width is based on the alloc size, not the type size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170270 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 09:26:06 +00:00
Chandler Carruth
5db4bceb47 Make '-mtune=x86_64' assume fast unaligned memory accesses.
Not all chips targeted by x86_64 have this feature, but a dramatically
increasing number do. Specifying a chip-specific tuning parameter will
continue to turn the feature on or off as appropriate for that
particular chip, but the generic flag should try to achieve the best
performance on the most widely available hardware. Today, the number of
chips with fast UA access dwarfs those without in the x86-64 space.

Note that this also brings LLVM's code generation for this '-march' flag
more in line with that of modern GCCs. Reviewed by Dan Gohman.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170269 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 09:01:13 +00:00
Chandler Carruth
0625929cc5 Actually update the grammar of this sentence to reflect the removal of CellSPU.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170268 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 08:56:20 +00:00
NAKAMURA Takumi
0005093db6 Revert r170246, "Enable the loop vectorizer by default."
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170267 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 06:11:13 +00:00
Reed Kotler
ed23fa8e55 This code implements most of mips16 hardfloat as it is done by gcc.
In this case, essentially it is soft float with different library routines.
The next step will be to make this fully interoperational with mips32 floating
point and that requires creating stubs for functions with signatures that
contain floating point types.

I have a more sophisticated design for mips16 hardfloat which I hope to
implement at a later time that directly does floating point without the need
for function calls.

The mips16 encoding has no floating point instructions so one needs to
switch to mips32 mode to execute floating point instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170259 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 00:20:05 +00:00
Eric Christopher
b1e66d0c4f To simplify some code move the unit emission into the holders.
Make emitDIE public accordingly. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170258 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 00:04:07 +00:00
Eric Christopher
cf6b8ad784 Use begin and end label names from the section for info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170257 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15 00:04:04 +00:00
Kevin Enderby
a827a47923 Make sure the alternate PC+imm syntax of LDR instruction with a small
immediate generates the narrow version.  Needed when doing round-trip
assemble/disassemble testing using the alternate syntax that specifies
'pc' directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170255 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 23:04:25 +00:00
Michael Ilseman
07acee7a09 Add back FoldOpIntoPhi optimizations with fix. Included test cases to help catch these errors and to test the presence of the optimization itself
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170248 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 22:08:26 +00:00
Nadav Rotem
f53e7cb9b9 Enable the loop vectorizer by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170246 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 21:30:23 +00:00
Nadav Rotem
0a1e914f8f TypeLegalizer: Do not generate target specific nodes with illegal types, because we cant type-legalize them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170245 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 21:20:37 +00:00
Duncan Sands
58d15b5b21 Release notes for dragonegg 3.2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170243 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 21:10:59 +00:00
Nadav Rotem
fd360c3e24 Fix a crash in ValueTracking on vectors of pointers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170240 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 20:43:49 +00:00
Bill Schmidt
d3eb4f46f0 This patch removes some nondeterminism from direct object file output
for TLS dynamic models on 64-bit PowerPC ELF.  The default sort routine
for relocations only sorts on the r_offset field; but with TLS, there
can be two relocations with the same r_offset.  For PowerPC, this patch
sorts secondarily on descending r_type, which matches the behavior
expected by the linker.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170237 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 20:28:38 +00:00
Pedro Artigas
99cbdde619 Add more reset methods to make all objects that the backend may use for outputting code have a reset, some are not used but were declared for completeness
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170227 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 18:52:11 +00:00
Shuxin Yang
a5ed031fbc rdar://12753946
Implement rule : "x * (select cond 1.0, 0.0) -> select cond x, 0.0"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170226 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 18:46:06 +00:00
NAKAMURA Takumi
63cab6c9d2 [CMake] Move libxml2 stuff from clang to llvm/cmake.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170225 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 18:30:20 +00:00
Bill Schmidt
b453e16855 This patch improves the 64-bit PowerPC InitialExec TLS support by providing
for a wider range of GOT entries that can hold thread-relative offsets.
This matches the behavior of GCC, which was not documented in the PPC64 TLS
ABI.  The ABI will be updated with the new code sequence.

Former sequence:

  ld 9,x@got@tprel(2)
  add 9,9,x@tls

New sequence:

  addis 9,2,x@got@tprel@ha
  ld 9,x@got@tprel@l(9)
  add 9,9,x@tls

Note that a linker optimization exists to transform the new sequence into
the shorter sequence when appropriate, by replacing the addis with a nop
and modifying the base register and relocation type of the ld.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170209 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 17:02:38 +00:00
Evgeniy Stepanov
79c3742620 Fix lint warnings in MemorySanitizer.cpp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170203 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:48:31 +00:00
Chandler Carruth
9f1f63ecc2 The CellSPU backend is more than experimental, it's dead now...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170201 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:44:05 +00:00
Chandler Carruth
dea0c19ab8 Remove a section that was in 3.1's notes.
Just give a shout if this was actually still important....

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170200 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:43:59 +00:00
Evgeniy Stepanov
63cca4e2fd [msan] Origin stores and loads do not need explicit alignment.
Origin address is always 4 byte aligned, and the access type is always i32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170199 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:43:11 +00:00
Chandler Carruth
e6b63c1188 Remove several entries from the 3.2 release notes that were in the 3.1
release notes already. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170198 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:41:02 +00:00
Chandler Carruth
7629285b3b Fix the order of these sections of the release notes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170197 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:37:18 +00:00
Chandler Carruth
ff038d7c73 Add a rough draft of some content about the new SROA. I'll try to proof
read this and clean it up tomorrow, but hopefully it's a good
placeholder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170196 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:37:17 +00:00
Chandler Carruth
b1c83058a4 Delete a long-stale "if its ready" comment. All indications is that this
will look a bit different when we have time to get it ready to turn on,
and we won't likely need this reminder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170195 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:37:12 +00:00
Chandler Carruth
d7407cd61e Provide some actual highlight bullets for Clang.
If anyone has better highlights (I'm obviously biased by the things that
I'm excited about) jump in and add them!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170194 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 13:22:57 +00:00
Evgeniy Stepanov
e08878efa3 [msan] Refactor default shadow propagation and origin tracking.
This change moves the code for default shadow propagaition (handleShadowOr)
and origin tracking (setOriginForNaryOp) into a new builder-like class. Also
gets rid of handleShadowOrBinary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170192 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 12:54:18 +00:00
Patrik Hagglund
702474dbb2 Change TargetLowering::getLoadExtAction to take an MVT, instead of
EVT.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170183 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 09:05:13 +00:00
Nadav Rotem
31bc9e00d1 revert r170166 - disable the loop vectorizer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170172 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 01:57:00 +00:00
Nadav Rotem
44a71c4575 Enable the loop vectorizer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170166 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 00:30:34 +00:00
Nadav Rotem
a97fd7f1a8 Disable the loop vectorizer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170162 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-14 00:02:07 +00:00
Jakob Stoklund Olesen
caf946edf3 Use the new MI bundling API in MachineInstrBundle itself.
The new API is higher level than just manipulating the bundle flags
directly, and the setIsInsideBundle() function will disappear soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170159 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 23:23:46 +00:00
Shuxin Yang
200e2370dc Remove two popcount patterns which we are already able to recognize.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170158 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 23:16:19 +00:00
Nadav Rotem
9ad73e93a5 Enable the Loop Vectorizer by default for O2 and O3. Disable if-conversion by default. I plan to revert this patch later today.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170157 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 23:11:54 +00:00
David Blaikie
01bc2b39a4 Debug Info: add support to mark member variables as artificial
This is the LLVM portion of r170154.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170156 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 22:43:07 +00:00
Chris Lattner
05bc091336 fix comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170155 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 22:34:43 +00:00
Bill Schmidt
1e18b86192 This is another cleanup patch for 64-bit PowerPC TLS processing. I had
some hackery in place that hid my poor use of TblGen, which I've now sorted
out and cleaned up.  No change in observable behavior, so no new test cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170149 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 20:57:10 +00:00
Patrik Hagglund
009e1e21d4 Change TargetLowering::setTypeAction to take an MVT, instead fo EVT.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170148 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 20:42:43 +00:00
Sean Silva
c5351a0a63 docs: Improve discussion of syntax highlighting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170145 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 20:14:25 +00:00
Dmitri Gribenko
dcd3a70297 Documentation: CompilerWriterInfo.rst: update link to Intel documentation
Replaces old Pentium 4 documentation link with generic current documentation link.

Patch by Kevin Schoedel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170144 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 20:02:11 +00:00
Tom Stellard
08f2d9379c Fix warnings with -DNDEBUG
Patch by: NAKAMURA Takumi

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170142 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 19:38:52 +00:00
Bill Schmidt
dfebc4cc4c This is just a clean-up patch that simplifies the initial-exec TLS logic by
avoiding use of machine operand flags.  No change in observable behavior, so
no new test cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170141 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 18:45:54 +00:00
Patrik Hagglund
860e7cdab9 Change TargetLowering::getRepRegClassFor to take an MVT, instead of
EVT.

Accordingly, change RegDefIter to contain MVTs instead of EVTs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170140 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 18:45:35 +00:00
Roman Divacky
d14baf450b Add options to disable building of ARCMT, Rewriter and Static Analyzer
in clang. The default remains to build those.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170134 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 16:07:19 +00:00
Joel Jones
1d3b7e749d Fix spelling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170130 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 15:25:07 +00:00
NAKAMURA Takumi
0069b55b8a JITEventListener.h: Use llvm-config.h instead of config.h.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170129 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13 15:03:38 +00:00