./lang/clang, C language family frontend for LLVM

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Branch: CURRENT, Version: 6.0.1, Package name: clang-6.0.1, Maintainer: pkgsrc-users

Low Level Virtual Machine (LLVM) is:

A compilation strategy designed to enable effective program optimization across
the entire lifetime of a program. LLVM supports effective optimization at
compile time, link-time (particularly interprocedural), run-time and offline
(i.e., after software is installed), while remaining transparent to developers
and maintaining compatibility with existing build scripts.

A virtual instruction set - LLVM is a low-level object code representation that
uses simple RISC-like instructions, but provides rich, language-independent,
type information and dataflow (SSA) information about operands. This combination
enables sophisticated transformations on object code, while remaining
light-weight enough to be attached to the executable. This combination is key to
allowing link-time, run-time, and offline transformations.

A compiler infrastructure - LLVM is also a collection of source code that
implements the language and compilation strategy. The primary components of the
LLVM infrastructure are a GCC-based C & C++ front-end, a link-time optimization
framework with a growing set of global and interprocedural analyses and
transformations, static back-ends for the X86, X86-64, PowerPC 32/64, ARM,
Thumb, IA-64, Alpha and SPARC architectures, a back-end which emits portable C
code, and a Just-In-Time compiler for X86, X86-64, PowerPC 32/64 processors.


Required to run:
[textproc/libxml2] [lang/llvm]

Required to build:
[lang/python27] [pkgtools/cwrappers]

Master sites:

SHA1: d93d8f3e3d7eb549ac58507383f7fcbdd78804d7
RMD160: c280cd2037b19f9bd733944b765f9ca23b35e0a4
Filesize: 11626.73 KB

Version history: (Expand)


CVS history: (Expand)


   2018-08-09 16:56:42 by Jonathan Perkin | Files touched by this commit (6)
Log message:
clang: Use the full LLVM suite on SunOS.

This enables compiler-rt, libcxx, and libunwind, as well as fixing various
assumptions in the code about what should be set on SunOS.  In bulk builds
a while back this was able to compete favourably with GCC.
   2018-08-07 12:44:50 by Adam Ciarcinski | Files touched by this commit (16) | Package updated
Log message:
llvm: updated to 6.0.1

6.0.1:

Non-comprehensive list of changes in this release

Support for retpolines was added to help mitigate “branch target injection” \ 
(variant 2) of the “Spectre” speculative side channels described by Project \ 
Zero and the Spectre paper.
The Redirects argument of llvm::sys::ExecuteAndWait and llvm::sys::ExecuteNoWait \ 
was changed to an ArrayRef of optional StringRef‘s to make it safer and more \ 
convenient to use.
The backend name was added to the Target Registry to allow run-time information \ 
to be fed back into TableGen. Out-of-tree targets will need to add the name used \ 
in the def X : Target definition to the call to RegisterTarget.
The Debugify pass was added to opt to facilitate testing of debug info \ 
preservation. This pass attaches synthetic DILocations and DIVariables to the \ 
instructions in a Module. The CheckDebugify pass determines how much of the \ 
metadata is lost.
Significantly improved quality of CodeView debug info for Windows.
Preliminary support for Sanitizers and sibling features on X86(_64) NetBSD \ 
(ASan, UBsan, TSan, MSan, SafeStack, libFuzzer).

Changes to the LLVM IR
----------------------
The fast-math-flags (FMF) have been updated. Previously, the ‘fast’ flag \ 
indicated that floating-point reassociation was allowed and all other flags were \ 
set too. The ‘fast’ flag still exists, but there is a new flag called \ 
‘reassoc’ to indicate specifically that reassociation is allowed. A new bit \ 
called ‘afn’ was also added to selectively allow approximations for common \ 
mathlib functions like square-root. The new flags provide more flexibility to \ 
enable/disable specific floating-point optimizations. Making the optimizer \ 
respond appropriately to these flags is an ongoing effort.

Changes to the AArch64 Target
-----------------------------
Enabled the new GlobalISel instruction selection framework by default at -O0.

Changes to the ARM Target
-------------------------
Support for enabling SjLj exception handling on platforms where it isn’t the \ 
default.

Changes to the Hexagon Target
-----------------------------
The Hexagon backend now supports V65 ISA.
The -mhvx option now takes an optional value that specifies the ISA version of \ 
the HVX coprocessor. The available values are v60, v62 and v65. By default, the \ 
value is set to be the same as the CPU version.
The compiler option -mhvx-double is deprecated and will be removed in the next \ 
release of the compiler. Programmers should use the -mhvx-length option to \ 
specify the desired vector length: -mhvx-length=64b for 64-byte vectors and \ 
-mhvx-length=128b for 128-byte vectors. While the current default vector length \ 
is 64 bytes, users should always specify the length explicitly, since the \ 
default value may change in the future.
The target feature hvx-double is deprecated and will be removed in the next \ 
release. LLVM IR generators should use target features hvx-length64b and \ 
hvx-length128b to indicate the vector length. The length should always be \ 
specified when HVX code generation is enabled.

Changes to the MIPS Target
--------------------------
Fixed numerous bugs:

fpowi on MIPS64 giving incorrect results when used with a negative integer.
Usage of the asm ‘c’ constraint with the wrong datatype causing an assert/crash.
Fixed a conversion bug when using the DSP ASE.
Fixed an inconsistency where objects were not marked as using the microMIPS as \ 
when the micromips function attribute or the ”.set micromips” directive was \ 
used.
Reordered the MIPSR6 specific hazard scheduler pass to after the delay slot \ 
filler, fixing a class of rare edge case bugs where the delay slot filler would \ 
violate ISA restrictions.
Fixed a crash when using a type of unknown size with gp relative addressing.
Corrected the j macro for microMIPS.
Corrected the encoding of movep for microMIPS32r6.
Fixed an issue with the usage of insert instructions having an invalid set of \ 
operands.
Fixed an issue where TLS symbols were not marked as such.
Enabled the usage of register scavenging with MSA, due to its shorter offsets \ 
for loads and stores.
Corrected the ELF headers when using the DSP ASE.

New features:

The long branch pass now generates some R6 specific instructions when targeting \ 
MIPSR6.
The delay slot filler now performs more branch conversions if delay slots cannot \ 
be filled.
The MIPS MT ASE is now fully supported.
Added support for the lapc pseudo instruction.
Improved the selection of multiple instructions (dext, nmadd, nmsub).
Further improved microMIPS codesize reduction.

Deprecation notices:

microMIPS64R6 support was been deprecated since 5.0, and has now been completely \ 
removed.

Changes to the SystemZ Target
-----------------------------
During this release the SystemZ target has:

Added support for 128-bit atomic operations.
Added support for the “o” constraint for inline asm statements.

Changes to the X86 Target
-------------------------
During this release the X86 target has:

Added support for enabling SjLj exception handling on platforms where it isn’t \ 
the default.
Added intrinsics for Intel Extensions: VAES, GFNI, VPCLMULQDQ, AVX512VBMI2, \ 
AVX512BITALG, AVX512VNNI.
Added support for Intel Icelake CPU.
Fixed some X87 codegen bugs.
Added instruction scheduling information for Intel Sandy Bridge, Ivy Bridge, \ 
Haswell, Broadwell, and Skylake CPUs.
Improved scheduler model for AMD Jaguar CPUs.
Improved llvm-mc’s disassembler for some EVEX encoded instructions.
Add support for i8 and i16 vector signed/unsigned min/max horizontal reductions.
Improved codegen for memory comparisons
Improved codegen for i32 vector multiplies
Improved codegen for scalar integer absolute values
Improved codegen for vector integer rotations (XOP and AVX512)
Improved codegen of data being transferred between GPRs and K-registers.
Improved codegen for vector truncations.
Improved folding of address computations into gather/scatter instructions.
Gained initial support recognizing variable shuffles from vector element \ 
extracts and inserts.
Improved documentation for SSE/AVX intrinsics in intrin.h header files.
Gained support for emitting retpolines, including automatic insertion of the \ 
necessary thunks or using external thunks.
   2018-05-22 14:39:23 by Adam Ciarcinski | Files touched by this commit (10) | Package updated
Log message:
llvm: updated to 5.0.2

5.0.2:
Bug fix release.
   2018-02-07 13:10:21 by Joerg Sonnenberger | Files touched by this commit (1)
Log message:
Belatedly bump requirement. 4.0 and 5.0 are not API (nor ABI)
compatible.
   2017-12-30 11:39:25 by Adam Ciarcinski | Files touched by this commit (14) | Package updated
Log message:
llvm: updated to 5.0.1

LLVM 5.0.1:
This release contains bug-fixes for the LLVM 5.0.0 release. This
release is API and ABI compatible with 5.0.0.
   2017-12-01 20:22:13 by Adam Ciarcinski | Files touched by this commit (34) | Package updated
Log message:
llvm: updated to 5.0.0

5.0.0:
Non-comprehensive list of changes in this release
* LLVM’s WeakVH has been renamed to WeakTrackingVH and a new WeakVH has been \ 
introduced. The new WeakVH nulls itself out on deletion, but does not track \ 
values across RAUW.
* A new library named BinaryFormat has been created which holds a collection of \ 
code which previously lived in Support. This includes the file_magic structure \ 
and identify_magic functions, as well as all the structure and type definitions \ 
for DWARF, ELF, COFF, WASM, and MachO file formats.
* The tool llvm-pdbdump has been renamed llvm-pdbutil to better reflect its \ 
nature as a general purpose PDB manipulation / diagnostics tool that does more \ 
than just dumping contents.
* The BBVectorize pass has been removed. It was fully replaced and no longer \ 
used back in 2014 but we didn’t get around to removing it. Now it is gone. The \ 
SLP vectorizer is the suggested non-loop vectorization pass.
* A new tool opt-viewer.py has been added to visualize optimization remarks in \ 
HTML. The tool processes the YAML files produced by clang with the \ 
-fsave-optimization-record option.
* A new CMake macro LLVM_REVERSE_ITERATION has been added. If enabled, all \ 
supported unordered LLVM containers would be iterated in reverse order. This is \ 
useful for uncovering non-determinism caused by iteration of unordered \ 
containers. Currently, it supports reverse iteration of SmallPtrSet and \ 
DenseMap.
* A new tool llvm-dlltool has been added to create short import libraries from \ 
GNU style definition files. The tool utilizes the PE COFF SPEC Import Library \ 
Format and PE COFF Auxiliary Weak Externals Format to achieve compatibility with \ 
LLD and MSVC LINK.
   2017-07-11 21:47:38 by Adam Ciarcinski | Files touched by this commit (15)
Log message:
Changes 4.0.1:
This is a bug-fix release.
   2017-06-01 15:30:26 by Johnny C. Lam | Files touched by this commit (21)
Log message:
Use public SHLIB_TYPE instead of private _OPSYS_SHLIB_TYPE.