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* Handle '.' correctly in hex float literal parsing.Eli Friedman2013-07-171-30/+20
| | | | | | | | | | | There were a couple of different loops that were not handling '.' correctly in APFloat::convertFromHexadecimalString; these mistakes could lead to assertion failures and incorrect rounding for overlong hex float literals. Fixes PR16643. llvm-svn: 186539
* Fix a funny typo. Thanks to Aaron Ballman for noticing.Rafael Espindola2013-07-171-1/+1
| | | | llvm-svn: 186532
* Add FILE_SHARE_WRITE to openFileForRead.Rafael Espindola2013-07-171-1/+1
| | | | | | | | | | | | | | This should fix the windows bots. It looks like the failing tests are of the form prog1 > file prog2 file and prog2 fails trying to read the file. The best fix would probably be to close stdout/stderr in prog1, but it was not the intention of 186511 to change this, so just restore the old behavior for now. llvm-svn: 186530
* Split openFileForRead into Windows and Unix versions.Rafael Espindola2013-07-173-15/+40
| | | | | | | | | | | This has some advantages: * Lets us use native, utf16 windows functions. * Easy to produce good errors on windows about trying to use a directory when we want a file. * Simplifies the unix version a bit. llvm-svn: 186511
* Ensure sys::getProcessTriple always uses a normalized triple. Patch byDuncan Sands2013-07-171-1/+1
| | | | | | Thomas B. Jablin, from PR16636. llvm-svn: 186501
* Don't fallback to copy + delete in rename.Rafael Espindola2013-07-171-11/+2
| | | | | | | | | Rename's documentation says "Files are renamed as if by POSIX rename()". and it is used for atomically updating output files from a temporary. Having rename fallback to a non atomic copy has the potential to hide bugs, like using a temporary file in /tmp instead of a unique name next to the final destination. llvm-svn: 186483
* raw_ostream.cpp: Introduce <fcntl.h> to let O_BINARY provided. Or, ↵NAKAMURA Takumi2013-07-171-0/+5
| | | | | | | | llvm::outs() would be set to O_TEXT by default. llvm/test/Object/check_binary_output.ll is expected to pass on win32. llvm-svn: 186480
* Add a wrapper for open.Rafael Espindola2013-07-166-54/+66
| | | | | | | This centralizes the handling of O_BINARY and opens the way for hiding more differences (like how open behaves with directories). llvm-svn: 186447
* [Support] Add a Unicode conversion wrapper from UTF16 to UTF8Reid Kleckner2013-07-161-0/+55
| | | | | | | | | | | This is to support parsing UTF16 response files in LLVM/lib/Option for lld and clang. Reviewers: hans Differential Revision: http://llvm-reviews.chandlerc.com/D1138 llvm-svn: 186426
* Create files with mode 666. This matches the behavior of other unix tools.Rafael Espindola2013-07-161-1/+1
| | | | llvm-svn: 186414
* [Support] Fix some warnings when self-hosting clang on WindowsReid Kleckner2013-07-162-2/+5
| | | | llvm-svn: 186413
* [APFloat] PR16573: Avoid losing mantissa bits in ppc_fp128 to double truncationUlrich Weigand2013-07-161-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When truncating to a format with fewer mantissa bits, APFloat::convert will perform a right shift of the mantissa by the difference of the precision of the two formats. Usually, this will result in just the mantissa bits needed for the target format. One special situation is if the input number is denormal. In this case, the right shift may discard significant bits. This is usually not a problem, since truncating a denormal usually results in zero (underflow) after normalization anyway, since the result format's exponent range is usually smaller than the target format's. However, there is one case where the latter property does not hold: when truncating from ppc_fp128 to double. In particular, truncating a ppc_fp128 whose first double of the pair is denormal should result in just that first double, not zero. The current code however performs an excessive right shift, resulting in lost result bits. This is then caught in the APFloat::normalize call performed by APFloat::convert and causes an assertion failure. This patch checks for the scenario of truncating a denormal, and attempts to (possibly partially) replace the initial mantissa right shift by decrementing the exponent, if doing so will still result in a valid *target format* exponent. Index: test/CodeGen/PowerPC/pr16573.ll =================================================================== --- test/CodeGen/PowerPC/pr16573.ll (revision 0) +++ test/CodeGen/PowerPC/pr16573.ll (revision 0) @@ -0,0 +1,11 @@ +; RUN: llc < %s | FileCheck %s + +target triple = "powerpc64-unknown-linux-gnu" + +define double @test() { + %1 = fptrunc ppc_fp128 0xM818F2887B9295809800000000032D000 to double + ret double %1 +} + +; CHECK: .quad -9111018957755033591 + Index: lib/Support/APFloat.cpp =================================================================== --- lib/Support/APFloat.cpp (revision 185817) +++ lib/Support/APFloat.cpp (working copy) @@ -1956,6 +1956,23 @@ X86SpecialNan = true; } + // If this is a truncation of a denormal number, and the target semantics + // has larger exponent range than the source semantics (this can happen + // when truncating from PowerPC double-double to double format), the + // right shift could lose result mantissa bits. Adjust exponent instead + // of performing excessive shift. + if (shift < 0 && isFiniteNonZero()) { + int exponentChange = significandMSB() + 1 - fromSemantics.precision; + if (exponent + exponentChange < toSemantics.minExponent) + exponentChange = toSemantics.minExponent - exponent; + if (exponentChange < shift) + exponentChange = shift; + if (exponentChange < 0) { + shift -= exponentChange; + exponent += exponentChange; + } + } + // If this is a truncation, perform the shift before we narrow the storage. if (shift < 0 && (isFiniteNonZero() || category==fcNaN)) lostFraction = shiftRight(significandParts(), oldPartCount, -shift); llvm-svn: 186409
* Add a version of sys::fs::status that uses fstat.Rafael Espindola2013-07-162-40/+68
| | | | llvm-svn: 186378
* Instead friending status, provide windows and posix constructors to file_status.Rafael Espindola2013-07-162-25/+18
| | | | | | | This opens the way of having static helpers in the .inc files that can construct a file_status. llvm-svn: 186376
* Remove an extra is_directory call.Rafael Espindola2013-07-151-11/+0
| | | | | | I checked that opening a directory on windows does fail, so this saves a "stat". llvm-svn: 186345
* Add include to hopefully fix windows build.Craig Topper2013-07-151-0/+1
| | | | llvm-svn: 186310
* Revert part of 186302 to fix buildbots.Craig Topper2013-07-151-1/+2
| | | | llvm-svn: 186303
* Use llvm::array_lengthof to replace sizeof(array)/sizeof(array[0]).Craig Topper2013-07-152-7/+4
| | | | llvm-svn: 186301
* Add DW_AT_GNU_odr_signature to the set of dwarf attributes.Eric Christopher2013-07-141-0/+1
| | | | llvm-svn: 186296
* Windows/TimeValue.inc: Mute prefixed '0' on %d to emulate %e.NAKAMURA Takumi2013-07-121-0/+5
| | | | | | It fixes compatibility in llvm/test/Object/archive-toc.test. llvm-svn: 186142
* Add back code for supporting old mingw versions. Should bring the bots back.Rafael Espindola2013-07-111-3/+13
| | | | llvm-svn: 186096
* Don't use a potentially expensive shift if all we want is one set bit.Benjamin Kramer2013-07-111-1/+1
| | | | | | No functionality change. llvm-svn: 186095
* Looks like some versions of mingw don't have errno_t. Use int.Rafael Espindola2013-07-111-1/+1
| | | | llvm-svn: 186092
* Use move semantics if possible to construct ConstantRanges.Benjamin Kramer2013-07-111-5/+6
| | | | | | | Arithmetic on ConstantRanges creates a lot of large temporary APInts that benefit from move semantics. llvm-svn: 186091
* Fix a FIXME about the format and add a test.Rafael Espindola2013-07-112-26/+16
| | | | | | | While at it, use strftime on Unix too and use the thread safe versions of localtime. llvm-svn: 186090
* MemoryBuffer::getFile handles zero sized files, no need to duplicate the test.Rafael Espindola2013-07-101-21/+2
| | | | llvm-svn: 186018
* Use status to implement file_size.Rafael Espindola2013-07-102-35/+1
| | | | | | | | | | The status function is already using a syscall that returns the file size. Remember it and implement file_size as a simple wrapper. No functionally change, but clients that already use status now can avoid calling file_size. llvm-svn: 186016
* Revert r185852.Manman Ren2013-07-081-5/+0
| | | | llvm-svn: 185861
* Find xdot or xdot.py.Matt Arsenault2013-07-081-3/+3
| | | | | | Ubuntu installs this as xdot, so finding xdot.py would fail. llvm-svn: 185860
* StringRef: add DenseMapInfo for StringRef.Manman Ren2013-07-081-0/+5
| | | | | | | | Remove the implementation in include/llvm/Support/YAMLTraits.h. Added a DenseMap type DITypeHashMap in DebugInfo.h: DenseMap<std::pair<StringRef, unsigned>, MDNode*> llvm-svn: 185852
* We now always create files with the correct permissions. Simplify the interface.Rafael Espindola2013-07-082-65/+1
| | | | llvm-svn: 185834
* Create files with the correct permission instead of changing it afterwards.Rafael Espindola2013-07-081-22/+7
| | | | | | Not intended functionality change. llvm-svn: 185830
* Remove unique_file now that it is unused.Rafael Espindola2013-07-051-17/+0
| | | | llvm-svn: 185728
* Add a createUniqueFile function and switch llvm's users of unique_file.Rafael Espindola2013-07-053-6/+16
| | | | | | | | | | | | | | This function is complementary to createTemporaryFile. It handles the case were the unique file is *not* temporary: we will rename it in the end. Since we will rename it, the file has to be in the same filesystem as the final destination and we don't prepend the system temporary directory. This has a small semantic difference from unique_file: the default mode is 0666. This matches the behavior of most unix tools. For example, with this change lld now produces files with the same permissions as ld. I will add a test of this change when I port clang over to createUniqueFile (next commit). llvm-svn: 185726
* Use sys::fs::createTemporaryFile.Rafael Espindola2013-07-051-2/+1
| | | | llvm-svn: 185719
* Add a higher level createTemporaryFile function.Rafael Espindola2013-07-051-0/+34
| | | | | | | | This function is inspired by clang's Driver::GetTemporaryPath. It hides the pattern used for uniquing and requires simple file names that are always placed in the system temporary directory. llvm-svn: 185716
* Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid ↵Craig Topper2013-07-041-1/+1
| | | | | | specifying the vector size. llvm-svn: 185606
* Reapply r185601 with a fix for the cmake build.Eric Christopher2013-07-041-0/+10
| | | | llvm-svn: 185605
* Temporarily revert 185601 as it caused cmake build regressions.Eric Christopher2013-07-041-10/+0
| | | | llvm-svn: 185603
* Add support for futimens for platforms that don't support futimes.Eric Christopher2013-07-041-0/+10
| | | | | | Patch by pashev.igor. llvm-svn: 185601
* [APFloat] Swap an early out check so we do not dereference str.end().Michael Gottesman2013-07-021-1/+1
| | | | | | | Originally if D.firstSigDigit == str.end(), we will have already dereferenced D.firstSigDigit in the first predicate. llvm-svn: 185437
* [APFloat] Ensure that we can properly parse strings that do not have null ↵Michael Gottesman2013-07-011-1/+8
| | | | | | | | terminators. rdar://14323230 llvm-svn: 185397
* Fix a bad overflow check pointed out by Ben.Jakob Stoklund Olesen2013-06-281-4/+2
| | | | llvm-svn: 185226
* Eliminate an assortment of undefined behavior.Jakob Stoklund Olesen2013-06-281-1/+5
| | | | | | Hopefully, this fixes the PPC64 buildbots. llvm-svn: 185218
* Stylistic cleanups, no functional change.Jakob Stoklund Olesen2013-06-281-10/+7
| | | | | | | | - Use static functions instead of anonymous namespace. - Appease the Doxygen lobby. - Use 0-based induction variable. llvm-svn: 185185
* Add a division operator to BlockFrequency.Jakob Stoklund Olesen2013-06-281-23/+35
| | | | | | | | | | | Allow a BlockFrequency to be divided by a non-zero BranchProbability with saturating arithmetic. This will be used to compute the frequency of a loop header given the probability of leaving the loop. Our long division algorithm already saturates on overflow, so that was a freebie. llvm-svn: 185184
* Improve comment.Rafael Espindola2013-06-281-4/+3
| | | | llvm-svn: 185141
* Suppress GCC "control reaches end of non-void function" warning.Patrik Hagglund2013-06-281-0/+1
| | | | llvm-svn: 185136
* Improvements to unique_file and createUniqueDirectory.Rafael Espindola2013-06-283-241/+235
| | | | | | | | | | | | | | | | | | | * Don't try to create parent directories in unique_file. It had two problem: * It violates the contract that it is atomic. If the directory creation success and the file creation fails, we would return an error but the file system was modified. * When creating a temporary file clang would have to first check if the parent directory existed or not to avoid creating one when it was not supposed to. * More efficient implementations of createUniqueDirectory and the unique_file that produces only the file name. Now all 3 just call into a static function passing what they want (name, file or directory). Clang also has to be updated, so tests might fail if a bot picks up this commit and not the corresponding clang one. llvm-svn: 185126
* Don't ask for a mode when we are not keeping the file.Rafael Espindola2013-06-281-2/+2
| | | | llvm-svn: 185123
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