Commit Graph

83045 Commits

Author SHA1 Message Date
Bill Wendling 1c5e94a47c Sphinxify the CodingStandard documentation.
llvm-svn: 158786
2012-06-20 02:57:56 +00:00
Nick Kledzik 18497e9242 Add permissions(), map_file_pages(), and unmap_file_pages() to llvm::sys::fs and add unit test. Unix is implemented. Windows side needs to be implemented.
llvm-svn: 158770
2012-06-20 00:28:54 +00:00
Kaelyn Uhrain 2212f807c7 Don't assert when given an empty range.
llvm::RawMemoryObject handles empty ranges just fine, and the assert can
be triggered in the wild by e.g. invoking clang with a file that
included an empty pre-compiled header file when clang has been built
with assertions enabled. Without assertions enabled, clang will properly
report that the empty file is not a valid PCH.

llvm-svn: 158769
2012-06-20 00:16:40 +00:00
Jakob Stoklund Olesen 3802bbf35e Add regunit liveness support to LiveIntervals::handleMove().
When LiveIntervals is tracking fixed interference in regunits, make sure
to update those intervals as well. Currently guarded by -live-regunits.

llvm-svn: 158766
2012-06-19 23:50:18 +00:00
Bill Wendling 152c38503e Alphabetize.
llvm-svn: 158764
2012-06-19 23:47:58 +00:00
Chad Rosier 651f9a485a Tidy up.
llvm-svn: 158762
2012-06-19 23:37:57 +00:00
Chad Rosier 7369692790 Add an ensureMaxAlignment() function to MachineFrameInfo (analogous to
ensureAlignment() in MachineFunction).  Also, drop setMaxAlignment() in
favor of this new function.  This creates a main entry point to setting
MaxAlignment, which will be helpful for future work.  No functionality
change intended.

llvm-svn: 158758
2012-06-19 22:59:12 +00:00
Lang Hames 39fb1d08dc Add DAG-combines for aggressive FMA formation.
This patch adds DAG combines to form FMAs from pairs of FADD + FMUL or
FSUB + FMUL. The combines are performed when:
(a) Either
      AllowExcessFPPrecision option (-enable-excess-fp-precision for llc)
        OR
      UnsafeFPMath option (-enable-unsafe-fp-math)
    are set, and
(b) TargetLoweringInfo::isFMAFasterThanMulAndAdd(VT) is true for the type of
    the FADD/FSUB, and
(c) The FMUL only has one user (the FADD/FSUB).

If your target has fast FMA instructions you can make use of these combines by
overriding TargetLoweringInfo::isFMAFasterThanMulAndAdd(VT) to return true for
types supported by your FMA instruction, and adding patterns to match ISD::FMA
to your FMA instructions.

llvm-svn: 158757
2012-06-19 22:51:23 +00:00
Jakob Stoklund Olesen 2db1125b15 80 col.
llvm-svn: 158755
2012-06-19 22:50:53 +00:00
Chad Rosier bb335c96f9 Typo. Patch by Cameron McInally <cameron.mcinally@nyu.edu>.
llvm-svn: 158754
2012-06-19 22:28:18 +00:00
Bill Wendling 444075a281 Add Projects.rst to the toctree.
llvm-svn: 158753
2012-06-19 22:25:41 +00:00
Bill Wendling 34ffc89e93 Use correct capitalization.
llvm-svn: 158752
2012-06-19 22:25:17 +00:00
Jakob Stoklund Olesen 77a0cfb19a Add a triple.
The test was failing on Linux because of asm syntax differences.

llvm-svn: 158748
2012-06-19 21:46:25 +00:00
Jakob Stoklund Olesen 0f855e4263 Implement PPCInstrInfo::isCoalescableExtInstr().
The PPC::EXTSW instruction preserves the low 32 bits of its input, just
like some of the x86 instructions. Use it to reduce register pressure
when the low 32 bits have multiple uses.

This requires a small change to PeepholeOptimizer since EXTSW takes a
64-bit input register.

This is related to PR5997.

llvm-svn: 158743
2012-06-19 21:14:34 +00:00
Jakob Stoklund Olesen 8eb9905a7c Style: Don't reuse variables for multiple purposes.
No functional change.

llvm-svn: 158742
2012-06-19 21:10:18 +00:00
Marshall Clow 5d30133294 New test tool: obj2yaml
llvm-svn: 158730
2012-06-19 18:02:35 +00:00
Bill Wendling 7f0d23e427 Indent coding examples.
llvm-svn: 158728
2012-06-19 17:48:06 +00:00
Bill Wendling fb370510e7 Remove bad HTML tags. Add missing :.
llvm-svn: 158726
2012-06-19 17:43:57 +00:00
Chandler Carruth 198422a475 Fix PR13148, an inf-loop in StringMap.
StringMap suffered from the same bug as DenseMap: when you explicitly
construct it with a small number of buckets, you can arrange for the
tombstone-based growth path to be followed when the number of buckets
was less than '8'. In that case, even with a full map, it would compare
'0' as not less than '0', and refuse to grow the table, leading to
inf-loops trying to find an empty bucket on the next insertion. The fix
is very simple: use '<=' as the comparison. The same fix was applied to
DenseMap as well during its recent refactoring.

Thanks to Alex Bolz for the great report and test case. =]

llvm-svn: 158725
2012-06-19 17:40:35 +00:00
Chandler Carruth fc3856d9fb Remove some superfluous SCOPED_TRACEs from this unit test.
GoogleTest already prints errors with all the information about which
test case contained the error.

llvm-svn: 158724
2012-06-19 17:40:29 +00:00
Benjamin Kramer 83aa94711b Emit TableGen's header comment with C-style comments, so it can be used from C89 code.
Should silence warnings when compiling the X86 disassembler.

llvm-svn: 158723
2012-06-19 17:04:16 +00:00
Jan Wen Voung 7f5d79f864 Have ARM ELF use correct reloc for "b" instr.
The condition code didn't actually matter for arm "b" instructions,
unlike "bl".  It should just use the R_ARM_JUMP24 reloc.

llvm-svn: 158722
2012-06-19 16:03:02 +00:00
Hal Finkel d465810f7c Mark most PPC register classes to avoid write-after-write.
For processors with the G5-like instruction-grouping scheme, this helps avoid
early group termination due to a write-after-write dependency within the group.
It should also help on pipelined embedded cores.

On POWER7, over the test suite, this gives an average 0.5% speedup. The largest
speedups are:

SingleSource/Benchmarks/Stanford/Quicksort - 33%
MultiSource/Applications/d/make_dparser - 21%
MultiSource/Benchmarks/FreeBench/analyzer/analyzer - 12%
MultiSource/Benchmarks/MiBench/telecomm-FFT/telecomm-fft - 12%

Largest slowdowns:

SingleSource/Benchmarks/Stanford/Bubblesort - 23%
MultiSource/Benchmarks/Prolangs-C++/city/city - 21%
MultiSource/Benchmarks/BitBench/uuencode/uuencode - 16%
MultiSource/Benchmarks/mediabench/mpeg2/mpeg2dec/mpeg2decode - 13%

llvm-svn: 158719
2012-06-19 13:57:17 +00:00
Aaron Ballman f98d813948 Updating the credits after r158717
llvm-svn: 158718
2012-06-19 13:52:33 +00:00
Bill Wendling 6bf4417261 Put flag names on one line.
llvm-svn: 158715
2012-06-19 09:29:05 +00:00
Bill Wendling f0d91f3beb Fix italicized text.
llvm-svn: 158714
2012-06-19 09:27:54 +00:00
Bill Wendling b746402512 Use correct URL.
llvm-svn: 158713
2012-06-19 09:26:15 +00:00
Bill Wendling 5901a4e5f3 Fix numbering of list items.
llvm-svn: 158712
2012-06-19 09:25:04 +00:00
Bill Wendling f06ac97fd7 Fix some Sphinx mistakes.
llvm-svn: 158711
2012-06-19 09:23:23 +00:00
Bill Wendling a84e2df4f9 First attempt at Sphinx. Convert the Projects.html file to Sphinx format.
llvm-svn: 158709
2012-06-19 09:18:34 +00:00
Michael J. Spencer 96ebd91d6c [Support/PathV2] Fix out of bounds access in identify_magic when the file is empty.
llvm-svn: 158704
2012-06-19 05:29:57 +00:00
Akira Hatanaka 9f96bb8619 Make MipsLongBranch::runOnMachineFunction return true.
llvm-svn: 158702
2012-06-19 03:45:29 +00:00
Akira Hatanaka 9846239bbc Use MachineBasicBlock::instr_iterator instead of MachineBasicBlock::iterator in
MipsCodeEmitter.cpp.

llvm-svn: 158701
2012-06-19 03:39:45 +00:00
Hal Finkel 1cc27e44a4 Add support for generating reg+reg preinc stores on PPC.
PPC will now generate STWUX and friends.

llvm-svn: 158698
2012-06-19 02:34:32 +00:00
Rafael Espindola 31567515ed really add a triple :-(
llvm-svn: 158696
2012-06-19 02:17:35 +00:00
Rafael Espindola f2ae4075c8 Add a triple to the test.
llvm-svn: 158695
2012-06-19 01:42:34 +00:00
Rafael Espindola ca3e0ee8b3 Move the support for using .init_array from ARM to the generic
TargetLoweringObjectFileELF. Use this to support it on X86. Unlike ARM,
on X86 it is not easy to find out if .init_array should be used or not, so
the decision is made via TargetOptions and defaults to off.

Add a command line option to llc that enables it.

llvm-svn: 158692
2012-06-19 00:48:28 +00:00
Nuno Lopes f9abcb7ba9 revert r158660, since Chris has some issues with this patch (namely using code to reprent information only used by the compiler)
Original commit msg:
add the 'alloc' metadata node to represent the size of offset of buffers pointed to by pointers.
This metadata can be attached to any instruction returning a pointer

llvm-svn: 158688
2012-06-18 23:34:26 +00:00
David Blaikie 2417379c63 Don't copy a potentially-uninitialized variable.
Based on review discussion of r158638 with Chandler Carruth, Tobias von Koch, and Duncan Sands and a -Wmaybe-uninitialized warning from GCC.

llvm-svn: 158685
2012-06-18 22:31:28 +00:00
Manman Ren 6e1fd46fdf ARM: use NOEN loads and stores if possible when handling struct byval.
This change is to be enabled in clang.

rdar://9877866

llvm-svn: 158684
2012-06-18 22:23:48 +00:00
Hal Finkel 8eac009633 Allow up to 64 functional units per processor itinerary.
This patch changes the type used to hold the FU bitset from unsigned to uint64_t.
This will be needed for some upcoming PowerPC itineraries.

llvm-svn: 158679
2012-06-18 21:08:18 +00:00
Michael J. Spencer 626a4ecf3a [docs] Port FAQ over to Sphinx.
Patch by Mikael Lyngvig!

llvm-svn: 158677
2012-06-18 20:21:38 +00:00
Marshall Clow d3e2a76ca4 Added accessors for getting coff_relocation info
llvm-svn: 158675
2012-06-18 19:47:16 +00:00
Jim Grosbach cb540f5cff ARM: Define generic HINT instruction.
The NOP, WFE, WFI, SEV and YIELD instructions are all hints w/
a different immediate value in bits [7,0]. Define a generic HINT
instruction and refactor NOP, WFI, WFI, SEV and YIELD to be
assembly aliases of that.

rdar://11600518

llvm-svn: 158674
2012-06-18 19:45:50 +00:00
Jim Grosbach 9ec06a15d6 TableGen: AsmMatcher missing-features list minimization.
When returning a 'cannot match due to missing CPU features' error code,
if there are multiple potential matches with different feature sets,
return the smallest set of missing features from the alternatives as
that's most likely to be the one that's desired.

llvm-svn: 158673
2012-06-18 19:45:46 +00:00
Simon Atanasyan 15c4aed428 Add mipsel-* to the list of targets recognized by configure script.
llvm-svn: 158670
2012-06-18 19:06:25 +00:00
Nuno Lopes b7c941bad9 add the 'alloc' metadata node to represent the size of offset of buffers pointed to by pointers.
This metadata can be attached to any instruction returning a pointer

llvm-svn: 158660
2012-06-18 16:04:04 +00:00
Joel Jones 3237ce737e This change handles a another case for generating the bic instruction
when a compile time constant is known.  This occurs when implicitly zero 
extending function arguments from 16 bits to 32 bits.  The 8 bit case doesn't
need to be handled, as the 8 bit constants are encoded directly, thereby
not needing a separate load instruction to form the constant into a register.

<rdar://problem/11481151>

llvm-svn: 158659
2012-06-18 14:51:32 +00:00
Chandler Carruth a1da0bf5ef Add a regression test for the bug exposed by r158087, which has been
temporarily reverted.

This test is annoyingly overspecified, but I don't know of another way
to thoroughly test the saving and restoring of the registers. While this
will have to be adjusted even with the issue fixed in order to re-apply
r158087, those adjustments should very clearly indicate that it is still
correct (%esp getting restored prior to pops), whereas without it, this
case can easily slip under the radar.

Still, any suggestions for improvements are very welcome.

All credit to Matt Beaumont-Gay for reducing this out of an insane
Address Sanitizer crash to a reasonably small seg-faulting C program
when built with -mstackrealign. I just reduced it to IR, which was much
simpler. =]

llvm-svn: 158656
2012-06-18 09:15:04 +00:00
Chandler Carruth 2cc11fd8c7 Temporarily revert r158087.
This patch causes problems when both dynamic stack realignment and
dynamic allocas combine in the same function. With this patch, we no
longer build the epilog correctly, and silently restore registers from
the wrong position in the stack.

Thanks to Matt for tracking this down, and getting at least an initial
test case to Chad. I'm going to try to check a variation of that test
case in so we can easily track the fixes required.

llvm-svn: 158654
2012-06-18 07:03:12 +00:00