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221 Commits

Author SHA1 Message Date
Alexander Kornienko f00654e31b Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 
Apparently, the style needs to be agreed upon first.

llvm-svn: 240390
 2015-06-23 09:49:53 +00:00
Alexander Kornienko 70bc5f1398 Fixed/added namespace ending comments using clang-tidy. NFC 
The patch is generated using this command:

tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py -fix \
  -checks=-*,llvm-namespace-comment -header-filter='llvm/.*|clang/.*' \
  llvm/lib/


Thanks to Eugene Kosov for the original patch!

llvm-svn: 240137
 2015-06-19 15:57:42 +00:00
Pawel Bylica 86ac44744a Fix APInt long division algorithm 
Summary: This patch fixes step D4 of Knuth's division algorithm implementation. Negative sign of the step result was not always detected due to incorrect "borrow" handling.

Test Plan: Unit test that reveals the bug included.

Reviewers: chandlerc, yaron.keren

Reviewed By: yaron.keren

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9196

llvm-svn: 235699
 2015-04-24 07:38:39 +00:00
Pawel Bylica 6eeeac7b2a Test commit. Improve comments in APInt. NFC. 
llvm-svn: 234158
 2015-04-06 13:31:39 +00:00
Yaron Keren 39fc5a6fd7 Fix rare case where APInt divide algorithm applied un-needed transformation. 
APInt uses Knuth's D algorithm for long division. In rare cases the
implementation applied a transformation that was not needed.

Added unit tests for long division. KnuthDiv() procedure is fully covered.
There is a case in APInt::divide() that I believe is never used (marked with
a comment) as all users of divide() handle trivial cases earlier.

Patch by Pawel Bylica!

  http://reviews.llvm.org/D8448

llvm-svn: 233312
 2015-03-26 19:45:19 +00:00
Benjamin Kramer b4b5150dfc [APInt] Add an isSplat helper and use it in some places. 
To complement getSplat. This is more general than the binary
decomposition method as it also handles non-pow2 splat sizes.

llvm-svn: 233195
 2015-03-25 16:49:59 +00:00
Yaron Keren 92e1b62d45 Remove many superfluous SmallString::str() calls. 
Now that SmallString is a first-class citizen, most SmallString::str()
calls are not required. This patch removes a whole bunch of them, yet
there are lots more.

There are two use cases where str() is really needed:
1) To use one of StringRef member functions which is not available in
SmallString.
2) To convert to std::string, as StringRef implicitly converts while 
SmallString do not. We may wish to change this, but it may introduce
ambiguity.

llvm-svn: 232622
 2015-03-18 10:17:07 +00:00
Yaron Keren 09fb7c6e7a Teach raw_ostream to accept SmallString. 
Saves adding .str() call to any raw_ostream << SmallString usage
and a small step towards making .str() consistent in the ADTs by
removing one of the SmallString::str() use cases, discussion at

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20141013/240026.html

I'll update the Phabricator patch http://reviews.llvm.org/D6372
for review of the Twine SmallString support, it's more complex
than this one.

llvm-svn: 231763
 2015-03-10 07:33:23 +00:00
Benjamin Kramer 37dce44f73 Drop the hacks used for partial C99 math libraries. 
All supported platforms have half-way decent C99 support.

llvm-svn: 231679
 2015-03-09 18:35:18 +00:00
Benjamin Kramer 5f6a907288 MathExtras: Bring Count(Trailing|Leading)Ones and CountPopulation in line with countTrailingZeros 
Update all callers.

llvm-svn: 228930
 2015-02-12 15:35:40 +00:00
David Majnemer 7f03920dad APInt: udivrem should use machine instructions for single-word APInts 
This mirrors the behavior of APInt::udiv and APInt::urem.  Some
architectures, like X86, have a single instruction which can compute
both division and remainder.

llvm-svn: 224217
 2014-12-14 09:41:56 +00:00
David Majnemer a252138942 InstCombine: Don't miscompile (x lshr C1) udiv C2 
We have a transform that changes:
  (x lshr C1) udiv C2
into:
  x udiv (C2 << C1)

However, it is unsafe to do so if C2 << C1 discards any of C2's bits.

This fixes PR21255.

llvm-svn: 219634
 2014-10-13 21:48:30 +00:00
Benjamin Kramer 7000ca3f55 Modernize old-style static asserts. NFC. 
llvm-svn: 219588
 2014-10-12 17:56:40 +00:00
Benjamin Kramer f9a2975417 APInt: Unfold return expressions so RVO can work. 
Saves a couple of expensive deep copies. NFC.

llvm-svn: 219487
 2014-10-10 10:18:12 +00:00
Sanjay Patel 4cb54e0a78 typo 
llvm-svn: 217597
 2014-09-11 15:41:01 +00:00
Chandler Carruth 6464826597 [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 
definition below all of the header #include lines, lib/Support edition.

llvm-svn: 206847
 2014-04-22 03:07:47 +00:00
Craig Topper c10719f55d [C++11] Make use of 'nullptr' in the Support library. 
llvm-svn: 205697
 2014-04-07 04:17:22 +00:00
Alp Toker cb40291100 Fix known typos 
Sweep the codebase for common typos. Includes some changes to visible function
names that were misspelt.

llvm-svn: 200018
 2014-01-24 17:20:08 +00:00
Michael Gottesman e1fad2b560 Remove APInt::extractBit since it is already implemented via operator[]. Change tests for extractBit to test operator[]. 
llvm-svn: 197277
 2013-12-13 22:00:19 +00:00
Michael Gottesman 4497d963fb [block-freq] Add the APInt method extractBit. 
llvm-svn: 197271
 2013-12-13 20:47:34 +00:00
Benjamin Kramer b565f89929 APInt: Simplify code. No functionality change. 
llvm-svn: 183073
 2013-06-01 11:26:39 +00:00
Michael Gottesman 9d406f4ec7 [APInt] Implement tcDecrement as a counterpart to tcIncrement. This is for use in APFloat IEEE-754R 2008 nextUp/nextDown function. 
rdar://13852078

llvm-svn: 182801
 2013-05-28 19:50:20 +00:00
Michael J. Spencer df1ecbd734 Replace Count{Leading,Trailing}Zeros_{32,64} with count{Leading,Trailing}Zeros. 
llvm-svn: 182680
 2013-05-24 22:23:49 +00:00
Jakub Staszak 773be0ce1f Use pre-inc, pre-dec when possible. 
They are generally faster (at least not slower) than post-inc, post-dec.

llvm-svn: 177608
 2013-03-20 23:56:19 +00:00
Jakub Staszak 6605c604b9 Move part of APInt implementation from header to cpp file. These methods 
require call cpp file anyway, so we wouldn't gain anything by keeping them
inline.

llvm-svn: 175579
 2013-02-20 00:17:42 +00:00