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Commit Graph

33417 Commits

Author SHA1 Message Date
Owen Anderson
55b794723f Take advantage of undefined behavior if the source program tries to GEP
beyond the end of an alloca to make FastDSE faster and more aggressive.

llvm-svn: 39945
2007-07-16 23:34:39 +00:00
Reid Spencer
67ae861705 Normally, we don't want to install and we only need to build tools.
llvm-svn: 39944
2007-07-16 23:25:52 +00:00
Reid Spencer
c72a7b8362 No, we're not looking for a directory named /config.status.
Sigh .. fix copy & paste error.

llvm-svn: 39939
2007-07-16 22:54:42 +00:00
Reid Spencer
d43a77df41 In ModuleInfo.txt, make sure that the script being executed can be
found by prepending a .
In build-for-llvm-top.sh, dereference variables for exansion.

llvm-svn: 39936
2007-07-16 22:25:13 +00:00
Reid Spencer
9cd476449b Prepare for the future when llvm doesn't depend on llvm-gcc-4-0.
This also avoids a fork bomb from the llvm-top/build script which
doesn't know how to handle cycles in the dependence graph.

llvm-svn: 39933
2007-07-16 22:11:02 +00:00
Reid Spencer
01cc8f3c76 Remove insignificant test no longer needed.
llvm-svn: 39931
2007-07-16 22:03:36 +00:00
Owen Anderson
efc00e35cf Add support for walking up memory def chains, which enables finding many more
dead stores on 400.perlbench.

llvm-svn: 39929
2007-07-16 21:52:50 +00:00
Owen Anderson
f01c29815d Use realloc() to (potentially) resize the contents of SmallPtrSet in place.
llvm-svn: 39926
2007-07-16 21:27:44 +00:00
Reid Spencer
9496d63260 Return Undef if the block has no dominator. This was required to allow
llvm-gcc build to succeed. Without this change it fails in libstdc++
compilation. This causes no regressions in dejagnu tests. However, 
someone who knows this code better might want to review it.

llvm-svn: 39924
2007-07-16 21:03:44 +00:00
Dan Gohman
ef7c87f4d8 Use ConstantFoldFP for folding all unary floating-point operations which may
have an error, and refector out the code for binary operators into
ConstantFoldBinaryFP and use it for all binary floating-point operations
which may have an error. These functions still rely exclusively on errno
to detect errors though.

llvm-svn: 39923
2007-07-16 15:26:22 +00:00
Dan Gohman
e538b98446 Fix the documentation for llvm.sqrt so that sqrt(0) has defined behavior,
which appears to be the intent.

llvm-svn: 39922
2007-07-16 14:37:41 +00:00
Dan Gohman
0ba554c0c8 Fix comments about vectors to use the current wording.
llvm-svn: 39921
2007-07-16 14:29:03 +00:00
Dan Gohman
0c1259b7e4 Remove the trailing semicolon from function declarations in LLVM,
where it's interpreted as a comment, not part of the syntax.

llvm-svn: 39920
2007-07-16 13:37:30 +00:00
Bill Wendling
643f24f815 Fix validation errors
llvm-svn: 39917
2007-07-16 08:52:56 +00:00
Bill Wendling
120450ce00 Clean up some formatting
llvm-svn: 39916
2007-07-16 08:46:40 +00:00
Bill Wendling
c569c42d1a Clean up some formatting. Add some doc_code div tags.
llvm-svn: 39915
2007-07-16 08:44:39 +00:00
Reid Spencer
07f97e6e8e Prepare for building from llvm-top. Unfortunately, this doesn't work because
of the cyclic depndency between llvm and llvm-gcc-4-0.

llvm-svn: 39910
2007-07-16 08:05:18 +00:00
Chris Lattner
66b7f0c956 Repair a regression in Transforms/InstCombine/mul.ll that Reid noticed.
llvm-svn: 39896
2007-07-16 04:15:34 +00:00
Chris Lattner
96a035fce7 rename function to avoid llvm-upgrade warning
llvm-svn: 39895
2007-07-16 04:09:00 +00:00
Nick Lewycky
6cdd641e1d Start adding and cleaning up comments.
llvm-svn: 39894
2007-07-16 02:58:37 +00:00
Nick Lewycky
43e5fd5be7 Handle decrementing loops properly. Fixes PR1533.
Always pass the constant as the second parameter to HowManyLessThans.

Remove obsolete "isSigned" parameter.

llvm-svn: 39893
2007-07-16 02:08:00 +00:00
Chris Lattner
03bc1d9018 add a helper method.
llvm-svn: 39885
2007-07-15 23:32:03 +00:00
Chris Lattner
f2fd4e185e new testcase
llvm-svn: 39882
2007-07-15 22:30:34 +00:00
Chris Lattner
f6a91d74e0 Implement shift-simplify.ll:test[45].
First teach instcombine that sign bit checks only demand the 
sign bit, this allows simplify demanded bits to hack on 
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.

llvm-svn: 39880
2007-07-15 20:54:51 +00:00
Chris Lattner
9cb8da1cb8 Implement shift-simplify.ll:test3, turning:
(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.

llvm-svn: 39879
2007-07-15 20:42:37 +00:00
Nick Lewycky
701e227136 Clarify the language. Pointed out by Duncan Sands.
llvm-svn: 39857
2007-07-14 17:41:03 +00:00
Nick Lewycky
05e4170839 Fix the build. Patch from Holger Schurig.
llvm-svn: 39856
2007-07-14 15:11:14 +00:00
Anton Korobeynikov
5635277c36 Long live the exception handling!
This patch fills the last necessary bits to enable exceptions
handling in LLVM. Currently only on x86-32/linux.

In fact, this patch adds necessary intrinsics (and their lowering) which
represent really weird target-specific gcc builtins used inside unwinder.

After corresponding llvm-gcc patch will land (easy) exceptions should be
more or less workable. However, exceptions handling support should not be 
thought as 'finished': I expect many small and not so small glitches
everywhere.

llvm-svn: 39855
2007-07-14 14:06:15 +00:00
Nick Lewycky
93d39c53b6 Use maximal intersection algorithm exclusively. Fixes miscompile bug.
llvm-svn: 39852
2007-07-14 04:28:04 +00:00
Nick Lewycky
42e8a060a0 Add alternate ConstantRange intersection algorithm.
llvm-svn: 39851
2007-07-14 02:51:34 +00:00
Evan Cheng
bb0c0f7335 Added test case from PR1540.
llvm-svn: 39845
2007-07-13 23:57:33 +00:00
Devang Patel
9166ad7658 Make LCSSA a loop pass.
llvm-svn: 39844
2007-07-13 23:57:11 +00:00
Evan Cheng
260a390840 Fix for PR1540: Specify F0, F1 are sub-registers of D0, etc.
llvm-svn: 39843
2007-07-13 23:55:50 +00:00
Owen Anderson
9ade055c0f Handle GEPs with all-zero indices in the same way we handle pointer-pointer bitcasts. Also, fix a potentia infinite loop.
This brings FastDSE to parity with old DSE on 175.vpr.

llvm-svn: 39839
2007-07-13 22:50:48 +00:00
Devang Patel
cfdf3b6eff Disable claims to preserve analysis until open issues are resolved.
llvm-svn: 39834
2007-07-13 21:53:42 +00:00
Dan Gohman
48b2f7992b Eliminate an unused parameter.
llvm-svn: 39828
2007-07-13 20:16:50 +00:00
Dan Gohman
44771cf8e8 Fix the comment for LegalizeOp to more accurately reflect what it does.
llvm-svn: 39827
2007-07-13 20:14:11 +00:00
Chris Lattner
4db194d120 remove obsolete note
llvm-svn: 39825
2007-07-13 20:08:19 +00:00
Dan Gohman
1f4580ceb4 Don't call SimplifyVBinOp for non-vector operations, following earlier review
feedback. This theoretically makes the common (scalar) case more efficient.

llvm-svn: 39823
2007-07-13 20:03:40 +00:00
Chris Lattner
e19d21fc74 fix some bugs in the manual
llvm-svn: 39822
2007-07-13 20:01:46 +00:00
Owen Anderson
275a5ef481 Be more aggressive in removing dead stores, and in removing instructions trivially dead after DSE.
This drastically improves the effect of FastDSE on kimwitu++.

llvm-svn: 39819
2007-07-13 18:26:26 +00:00
Dale Johannesen
1a9d304c35 Modify previous patch per review comments.
llvm-svn: 39817
2007-07-13 17:31:29 +00:00
Dale Johannesen
469ed8e17e Skeleton of post-RA scheduler; doesn't do anything yet.
Change name of -sched option and DEBUG_TYPE to
pre-RA-sched; adjust testcases.

llvm-svn: 39816
2007-07-13 17:13:54 +00:00
Chris Lattner
7cba3578aa Fix CodeGen/Generic/print-arith-fp.ll on sparc (PR1551)
llvm-svn: 39813
2007-07-13 16:24:10 +00:00
Gabor Greif
8a0024300f these tests do not need a triple on Solaris. Thanks sabre!
llvm-svn: 39803
2007-07-13 10:08:18 +00:00
Reid Spencer
09aba24630 Regenerate to pick up Gabor's changes.
llvm-svn: 39802
2007-07-13 10:05:30 +00:00
Gabor Greif
63ef2849b2 * llvm.spec.in: update blurb
* autoconf/AutoRegen.sh: use variables for autofoo versions
* autoconf/configure.ac: test for some more functions
                         that are not guaranteed on solaris

Note: the svn:mime-type of autoconf/AutoRegen.sh
      should be set to something that allows for
			text compares using svn diff
llvm-svn: 39800
2007-07-13 09:48:29 +00:00
Owen Anderson
0ad3e0795b Reimplement removing stores to allocas at the end of a function. This should be safe now.
llvm-svn: 39790
2007-07-12 21:41:30 +00:00
Owen Anderson
999d27d563 Make the condition-checking for free with non-trivial dependencies more correct.
llvm-svn: 39789
2007-07-12 18:08:51 +00:00
Owen Anderson
6edb47d8be Remove the end-block handling code. It was unsafe, and making it safe would have resulted in falling back to the slow DSE case. I need to think some more about the right way to handle this.
llvm-svn: 39788
2007-07-12 17:52:20 +00:00