846f95080c
Reset StringMap's NumTombstones on clears and rehashes.
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StringMap was not properly updating NumTombstones after a clear or rehash.
This was not fatal until now because the table was growing faster than
NumTombstones could, but with the previous change of preventing infinite
growth of the table the invariant (NumItems + NumTombstones <= NumBuckets)
stopped being observed, causing infinite loops in certain situations.
Patch by José Fonseca!
llvm-svn: 128567
2011-03-30 18:32:51 +00:00
bdc1b01217
Prevent infinite growth of SmallPtrSet instances.
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Rehash but don't grow when full of tombstones.
Patch by José Fonseca!
llvm-svn: 128566
2011-03-30 18:32:48 +00:00
f587f4419c
Prevent infinite growth of SmallMap instances.
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Rehash but don't grow when full of tombstones.
Patch by José Fonseca!
llvm-svn: 128565
2011-03-30 18:32:44 +00:00
af0ed953c5
Avoid turning a floating point division with a constant power of two into a denormal multiplication.
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Some platforms may treat denormals as zero, on other platforms multiplication
with a subnormal is slower than dividing by a normal.
llvm-svn: 128555
2011-03-30 17:02:54 +00:00
03fd672609
Add APFloat::getExactInverse.
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The idea is, that if an ieee 754 float is divided by a power of two, we can
turn the division into a cheaper multiplication. This function sees if we can
get an exact multiplicative inverse for a divisor and returns it if possible.
This is the hard part of PR9587.
I tested many inputs against llvm-gcc's frotend implementation of this
optimization and didn't find any difference. However, floating point is the
land of weird edge cases, so any review would be appreciated.
llvm-svn: 128545
2011-03-30 15:42:27 +00:00
0bb2ad2cf7
Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code.
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llvm-svn: 128379
2011-03-27 14:26:13 +00:00
a4ec5b2c19
revert r128199 until it can be made to work with Frontend/dependency-gen.c.
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llvm-svn: 128218
2011-03-24 16:43:37 +00:00
e42162ad59
Remove all uses of PATH_MAX and MAXPATHLEN from PathV2.
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llvm-svn: 128199
2011-03-24 05:23:40 +00:00
2475adce37
We don't need a null terminator for the output file.
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llvm-svn: 128098
2011-03-22 19:20:47 +00:00
857e535520
Properly initialize all fields in CrashReporterCleanupContext. This caused the buildbot failure earlier.
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llvm-svn: 128071
2011-03-22 04:33:13 +00:00
9931652775
Temporarily stop recovering resources in CrashRecoveryContext while I investigate further why this works on my machine and not on others.
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llvm-svn: 128065
2011-03-22 02:06:32 +00:00
ab1a242ead
Provide a means for CrashRecovery clients to determine if code is currently running while crash recovery cleanups are being processed.
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llvm-svn: 128008
2011-03-21 18:38:03 +00:00
dce83c522c
Avoid initializing posix_spawn_file_actions_t if not used.
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- glibc falls back to fork+exec if a file actions object is present.
- On BSDs this saves a malloc.
llvm-svn: 127969
2011-03-20 15:52:24 +00:00
32aea2e401
Tweak CrashRecoveryContextCleanup to provide an easy method for clients to select between 'delete' and 'destructor' cleanups, and allow the destructor of CrashRecoveryContextCleanupRegister to be pseudo re-entrant.
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llvm-svn: 127929
2011-03-19 00:59:37 +00:00
794a0714ad
Tweak CrashRecoveryContext::GetCurrent() to return quickly if 'gCrsahRecoveryEnabled' is false. This avoids us needing to go to thread local storage for
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the performance sensitive case where we are compiling code.
llvm-svn: 127928
2011-03-19 00:59:33 +00:00
806d507b0f
setExecutable() should default to success if there's nothing custom for it.
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llvm-svn: 127891
2011-03-18 18:51:03 +00:00
bac0d769cd
raw_ostream: [PR6745] Tweak formatting (double)%e for Windows hosts.
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On MSVCRT and compatible, output of %e is incompatible to Posix by default. Number of exponent digits should be at least 2. "%+03d"
FIXME: Implement our formatter in future!
llvm-svn: 127872
2011-03-18 09:30:10 +00:00
a50db6544f
Initialize the only-used-with-PPC-double-double parts of the APFloat class. This
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makes valgrind stop complaining about uninitialized variables being read when it
accesses a bitfield (category) that shares its bits with these variables.
llvm-svn: 127871
2011-03-18 09:09:44 +00:00
7c9cc46165
Check RequiresNullTerminator first, or we might read from an invalid address.
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llvm-svn: 127853
2011-03-18 02:55:51 +00:00
c44d3cf581
Augment CrashRecoveryContext to have registered "cleanup" objects that can be used to release resources during a crash.
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llvm-svn: 127849
2011-03-18 02:05:11 +00:00
ab959a2e68
Use RequiresNullTerminator to create buffers without a null terminator
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instead of copying.
llvm-svn: 127835
2011-03-17 22:18:42 +00:00
09a51bab5d
Add an argument to APInt's magic udiv calculation to specify the number of bits that are known zero in the divided number.
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This will come in handy soon.
llvm-svn: 127828
2011-03-17 20:39:06 +00:00
76e68ea916
lib/Support/raw_ostream.cpp: On mingw, report_fatal_error() should not be called at dtor context.
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report_fatal_error() invokes exit(). We know report_fatal_error() might not write messages to stderr when any errors were detected on FD == 2.
llvm-svn: 127726
2011-03-16 02:53:39 +00:00
a3d4749e24
Windows/PathV2.inc: [PR8520] Recognize "NUL" as special (character) file.
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FIXME: It is a temporal hack. We should detect as many "special file name" as possible.
llvm-svn: 127724
2011-03-16 02:53:32 +00:00
aaa9b4f824
Windows/Path.inc: [PR6270] PathV1::makeUnique(): Give arbitrary initial seed for workaround.
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FIXME: We should use sys::fs::unique_file() in future.
llvm-svn: 127723
2011-03-16 02:53:24 +00:00
d0332e4efe
Add scei vendor
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llvm-svn: 127705
2011-03-15 21:51:56 +00:00
cbe6a1ae86
Don't compute the file size if we don't need to.
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llvm-svn: 127426
2011-03-10 20:54:07 +00:00
258a605fce
Add r127409 back now that the windows file was updated.
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llvm-svn: 127417
2011-03-10 18:33:29 +00:00
510b00c67c
Try to fix the windows build.
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llvm-svn: 127416
2011-03-10 18:30:48 +00:00
e413d9d341
Revert r127409 which broke all the Windows bots.
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llvm-svn: 127413
2011-03-10 18:01:43 +00:00
ea5a137e55
Add support for MemoryBuffers that are not null terminated and add
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support for creating buffers that cover only a part of a file.
llvm-svn: 127409
2011-03-10 16:10:30 +00:00
5918457b5b
lib/Support/regcomp.c: Fix cygwin warning.
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llvm-svn: 127241
2011-03-08 12:25:29 +00:00
3e76b502a4
Windows/PathV2.inc: Eliminate redundant condition. DWORD is unsigned.
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llvm-svn: 127140
2011-03-07 00:12:53 +00:00
dfb0ad30a8
raw_ostream: while it is generally desirable to do larger writes, it can lead to
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inefficient file system buffering if the writes are not a multiple of the desired
buffer size. Avoid this by limiting the large write to a multiple of the buffer
size and copying the remainder into the buffer.
Thanks to Dan for pointing this out.
llvm-svn: 127026
2011-03-04 19:49:30 +00:00
acf0842088
raw_ostream: If writing a string that is larger than the buffer, write it directly instead of doing many buffer-sized writes.
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This caps the number of write(2) calls per string to a maximum of 2.
llvm-svn: 127010
2011-03-04 18:18:16 +00:00
06dfe8e9c5
Support: Add llvm::AreStatisticsEnabled().
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llvm-svn: 126558
2011-02-26 23:17:12 +00:00
8731d0cc83
The signed version of our "magic number" computation for the integer approximation
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of a constant had a minor typo introduced when copying it from the book, which
caused it to favor negative approximations over positive approximations in many
cases. Positive approximations require fewer operations beyond the multiplication.
In the case of division by 3, we still generate code that is a single instruction
larger than GCC's code.
llvm-svn: 126097
2011-02-21 00:22:02 +00:00
4192802280
Provide tag strings for llvm specific tags.
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llvm-svn: 125986
2011-02-18 23:06:29 +00:00
c37910ea28
improve support for OpenBSD, patch by Amit Kulkarni!
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llvm-svn: 125943
2011-02-18 17:04:56 +00:00
4f3f9c7ba9
Check the errorcode.
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llvm-svn: 125804
2011-02-18 00:47:07 +00:00
7cc6d12ad0
Enhance constant folding of bitcast operations on vectors of floats.
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Add getAllOnesValue of FP numbers to Constants and APFloat.
Add more tests.
llvm-svn: 125776
2011-02-17 21:22:27 +00:00
4c14a5cc2c
Triple::MinGW64 is deprecated and removed. We can use Triple::MinGW32 generally.
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No one uses *-mingw64. mingw-w64 is represented as {i686|x86_64}-w64-mingw32. In llvm side, i686 and x64 can be treated as similar way.
llvm-svn: 125747
2011-02-17 12:24:17 +00:00
a61736ff90
Implement a function from PathV2 whose definition is missing.
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llvm-svn: 125574
2011-02-15 17:51:19 +00:00
606bb1a2dc
Adds llvm::sys::path::is_separator() to test whether a char is a path separator
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on the host OS. Reviewed by dgregor.
llvm-svn: 125406
2011-02-11 21:24:40 +00:00
56b2ffdaba
Rip out realpath() support. It's expensive, and often a bad idea, and
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I have another way to achieve the same goal.
llvm-svn: 125239
2011-02-09 23:33:15 +00:00
f73f5ba21c
Attempt to fix the build after r125228.
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llvm-svn: 125236
2011-02-09 23:02:14 +00:00
529329e859
Add llvm::sys::path::canonical(), which provides the canonicalized
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name of a path, after resolving symbolic links and eliminating excess
path elements such as "foo/../" and "./".
This routine still needs a Windows implementation, but I don't have a
Windows machine available. Help? Please?
llvm-svn: 125228
2011-02-09 22:11:23 +00:00
189111808e
lib/Support/Errno.cpp: Check strerror_s() with HAVE_DECL_STRERROR_S in config.h.*.
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AC_CHECK_FUNCS seeks a symbol only in libs. We should check the declaration in string.h.
FIXME: I have never seen mingw(s) have strerror_s() (not _strerror_s()).
FIXME: Autoconf/CMake may seek strerror_s() with the definition MINGW_HAS_SECURE_API in future.
llvm-svn: 125172
2011-02-09 04:18:48 +00:00
aeb4c0d8fb
Windows/Windows.h: Redefine _WIN32_WINNT here. mingw-w64 tends to define it as 0x0502 in its headers.
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llvm-svn: 125171
2011-02-09 04:18:30 +00:00
28242e8ff6
Windows/Program.inc: Eliminate the declaration of SetInformationJobObject(). It should be provided with _WIN32_WINNT>=0x0500.
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llvm-svn: 125170
2011-02-09 04:18:21 +00:00
Jakob Stoklund Olesen