Commit Graph
58 Commits
Author SHA1 Message Date
Chris Bieneman cbccd8ddf5 Checking if TARGET_OS_IPHONE is defined isn't good enough for 10.7 and earlier.
Older versions of the TargetConditionals header always defined TARGET_OS_IPHONE to something (0 or 1), so we need to test not only for the existence but also if it is 1.

This resolves PR22631.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229904 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-19 19:50:52 +00:00
Chris Bieneman bc20f6088d Adding install targets for individual LLVM tools and libraries.
Summary:
* add_llvm_tool and add_llvm_library now add install-${name} targets to install specific components
* added installhdrs target to install just the LLVM headers
* The above changes only apply for single-configuration generators (Ninja, Makefiles...), not for multi-configuration generators (Visual Studio, Xcode...)

Reviewers: pete

Reviewed By: pete

Subscribers: pete, llvm-commits

Differential Revision: http://reviews.llvm.org/D7619

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229727 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-18 19:25:47 +00:00
Chris Bieneman c689d4b9f2 Fixing a CMake developer warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229721 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-18 18:52:11 +00:00
Chris Bieneman 56168c6553 Enable standard so versioning for libLLVM.
Summary: This resolves Bugzilla bug 15493.

Reviewers: chapuni, pete

Reviewed By: pete

Subscribers: pete, llvm-commits

Differential Revision: http://reviews.llvm.org/D6157

Conflicts:
	cmake/modules/AddLLVM.cmake

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229720 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-18 18:52:06 +00:00
Chris Bieneman c4300b9c01 Raising minimum required Visual Studio version to 2013.
This is based on the discussions on: [LLVMdev] [RFC] Raising LLVM minimum required MSVC version to 2013 for trunk

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229185 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-13 23:24:14 +00:00
Chris Bieneman 0213b090b8 Fixing broken bots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229176 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-13 23:10:31 +00:00
Chris Bieneman 845c00e2e6 NFC. Moving the RegisteredOptionCategories global into the CommandLineParser class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229172 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-13 22:54:32 +00:00
Chris Bieneman a87100c6d2 NFC. clang-format wants to change this from two lines to one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229171 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-13 22:54:29 +00:00
Chris Bieneman 736c14962e NFC. More code cleanup making LookupOption a member of the CommandLineParser.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229170 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-13 22:54:27 +00:00
Chris Bieneman ad83329ce5 Revert "Raising minimum required CMake version to 2.8.12.2."
This reverts commit add62ac537.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228616 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-09 22:07:49 +00:00
Chris Bieneman add62ac537 Raising minimum required CMake version to 2.8.12.2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228615 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-09 22:05:07 +00:00
Chris Bieneman 2048ee38ab NFC. Making printOptionValues an API on the parser class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227626 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-30 22:16:01 +00:00
Chris Bieneman 6f983fe160 Updating iOS.cmake to work with the latest Xcode and iOS 8 SDK.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227523 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-30 00:10:47 +00:00
Chris Bieneman b91ff6d8c5 iOS doesn't have histedit.h available. We should gate use of libedit on whether or not this headers exists.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227522 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-30 00:10:43 +00:00
Chris Bieneman 39687b93fa iOS doesn't have crt_externs.h available, so we fall back to the posix method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227521 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-30 00:10:39 +00:00
Chris Bieneman 75a1a5c24b Build fix for Visual Studio. NFC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227385 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-28 22:25:00 +00:00
Chris Bieneman b268ba8022 Moving AddLiteralOption's declaration higher up in the header to make gcc happy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227348 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-28 19:17:09 +00:00
Chris Bieneman 61b9b31ef1 Refactoring llvm command line parsing and option registration.
Summary:
The primary goal of this patch is to remove the need for MarkOptionsChanged(). That goal is accomplished by having addOption and removeOption properly sort the options.

This patch puts the new add and remove functionality on a CommandLineParser class that is a placeholder. Some of the functionality in this class will need to be merged into the OptionRegistry, and other bits can hopefully be in a better abstraction.

This patch also removes the RegisteredOptionList global, and the need for cl::Option objects to be linked list nodes.

The changes in CommandLineTest.cpp are required because these changes shift when we validate that options are not duplicated. Before this change duplicate options were only found during certain cl API calls (like cl::ParseCommandLine). With this change duplicate options are found during option construction.

Reviewers: dexonsmith, chandlerc, pete

Reviewed By: pete

Subscribers: pete, majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D7132

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227345 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-28 19:00:25 +00:00
Chris Bieneman 4990e83b7b Re-landing changes to use ArrayRef instead of SmallVectorImpl, and new API test.
This contains the changes from r227148 & r227154, and also fixes to the test case to properly clean up the stack options.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227255 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-27 22:21:06 +00:00
Chris Bieneman 57d5adfe15 One more fix to the new API to fix const-correctness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227154 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-27 00:42:00 +00:00
Chris Bieneman f96362358f Pete Cooper suggested the new API should use ArrayRef instead of SmallVectorImpl. Also adding a test case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227148 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-26 22:50:47 +00:00
Chris Bieneman 7006a12ba3 Add new HideUnrelatedOptions API that takes a SmallVectorImpl.
Need a new API for clang-modernize that allows specifying a list of option categories to remain visible. This will allow clang-modernize to move off getRegisteredOptions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227140 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-26 21:57:29 +00:00
Chris Bieneman e0c2d280a2 Putting all the standard tool options into a "Generic" category.
Summary:
This puts all the options that CommandLine.cpp implements into a category so that the APIs to hide options can not hide based on the generic category instead of string matching a partial list of argument strings.

This patch is pretty simple and straight forward but it does impact the -help output of all tools using cl::opt. Specifically the options implemented in CommandLine.cpp (help, help-list, help-hidden, help-list-hidden, print-options, print-all-options, version) are all grouped together into an Option category, and these options are never hidden by the cl::HideUnrelatedOptions API.

Reviewers: dexonsmith, chandlerc, majnemer

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7150

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227093 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-26 16:56:00 +00:00
Chris Bieneman 40a218658a Refactoring cl::parser construction and initialization.
Summary:
Some parsers need references back to the option they are members of. This is used for handling the argument string as well as by the various pass name parsers for making pass names into flags.

Making parsers that need to refer back to the option have a reference to the option eliminates some of the members of various parsers, and enables further code cleanup.

Reviewers: dexonsmith

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7131

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226864 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-22 21:01:12 +00:00
Chris Bieneman ce93603b11 Making deleted copy constructors and operators to be private for better diagnostics when deleted is not available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226769 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-22 02:51:33 +00:00
Chris Bieneman e84c7b1116 Assigning and copying command line option objects shouldn't be allowed.
Summary:
The default copy and assignment operators for these objects probably don't actually do what the clients intend, so they should be deleted.

Places using the assignment operator to set the value of an option should cast to the option's data type first to call into the override for operator=. Places using the copy constructor just need to be changed to not copy (i.e. passing by const reference instead of value).

Reviewers: dexonsmith, chandlerc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7114

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226762 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-22 01:49:59 +00:00
Chris Bieneman f04568139a Adding a new cl::HideUnrelatedOptions API to allow clang to migrate off cl::getRegisteredOptions.
Summary: cl::getRegisteredOptions really exposes some of the innards of how command line parsing is implemented. Exposing new APIs that allow us to disentangle client code from implementation details will allow us to make more extensive changes to command line parsing.

Reviewers: chandlerc, dexonsmith, beanz

Reviewed By: dexonsmith

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7100

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226729 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-21 22:45:52 +00:00
Chris Bieneman 33943f870f Running clang-format on CommandLine.h and CommandLine.cpp.
No functional changes, I'm just going to be doing a lot of work in these files and it would be helpful if they had more current LLVM style.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225817 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-13 19:14:20 +00:00
Chris Bieneman 3d6a903779 Have llvm-c-test only use libLLVM if libLLVM has all the right components.
Summary: We should only have llvm-c-test use libLLVM if the library is built with the default set of components or if LLVM_DYLIB_COMPONENTS includes all the LLVM_LINK_COMPONENTS required for llvm-c-test. Making libLLVM always used causes build failures if libLLVM doesn't include all

Reviewers: chapuni, ributzka

Reviewed By: ributzka

Subscribers: ributzka, llvm-commits

Differential Revision: http://reviews.llvm.org/D6668

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224541 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-18 21:03:49 +00:00
Chris Bieneman eaf5997921 Adding a new option to CMake to disable C++ atexit on llvm-shlib.
Summary:
This is desirable for WebKit and other clients of the llvm-shlib because C++ exit time destructors have a tendency to crash when invoked from multi-threaded applications.

Ideally this option will be temporary, because the ideal fix is to just not have exit time destructors.

Reviewers: chapuni, ributzka

Reviewed By: ributzka

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D6572

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223805 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-09 18:49:55 +00:00
Chris Bieneman 4b57390110 EXPORTED_SYMBOL_FILE using mingw and cmake
Summary: This is a fix for the command line syntax error while building LTO when using MinGW.

Patch By: jsroemer

Reviewers: rnk

Reviewed By: rnk

Subscribers: rnk, beanz, llvm-commits

Differential Revision: http://reviews.llvm.org/D5476

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220935 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-30 22:37:58 +00:00
Chris Bieneman 8744520b53 Removing the static initializer in ManagedStatic.cpp by using llvm_call_once to initialize the ManagedStatic mutex.
Summary:
This patch adds an llvm_call_once which is a wrapper around std::call_once on platforms where it is available and devoid of bugs. The patch also migrates the ManagedStatic mutex to be allocated using llvm_call_once.

These changes are philosophically equivalent to the changes added in r219638, which were reverted due to a hang on Win32 which was the result of a bug in the Windows implementation of std::call_once.

Reviewers: aaron.ballman, chapuni, chandlerc, rnk

Reviewed By: rnk

Subscribers: majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D5922

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220932 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-30 22:07:09 +00:00
Chris Bieneman 71926e73ba Adding llvm-shlib to CMake build system with a few new bells and whistles
Summary:
This patch adds a new CMake build setting LLVM_BUILD_LLVM_DYLIB, which defaults to OFF. When set to ON, this will generate a shared library containing most of LLVM. The contents of the shared library can be overriden by specifying LLVM_DYLIB_COMPONENTS. LLVM_DYLIB_COMPONENTS can be set to a semi-colon delimited list of any LLVM components that you llvm-config can resolve.

On Windows, unless you are using Cygwin, you must specify an explicit symbol export file using LLVM_EXPORTED_SYMBOL_FILE. On Cygwin and all unix-like platforms if you do not specify LLVM_EXPORTED_SYMBOL_FILE, an export file containing only the LLVM C API will be auto-generated from the list of LLVM components specified in LLVM_DYLIB_COMPONENTS.

Reviewers: rnk

Reviewed By: rnk

Subscribers: rnk, llvm-commits

Differential Revision: http://reviews.llvm.org/D5890

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220490 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-23 17:22:14 +00:00
Chris Bieneman 3c12c29cca Updating documentation based on my change to remove the template disambiguation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219862 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-15 23:11:40 +00:00
Chris Bieneman aaf36b40cc Fixing the build failure due to compiler warnings and unnecessary disambiguation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219861 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-15 23:11:35 +00:00
Chris Bieneman c14fb89680 Defining a new API for debug options that doesn't rely on static global cl::opts.
Summary:
This is based on the discussions from the LLVMDev thread:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-August/075886.html

Reviewers: chandlerc

Reviewed By: chandlerc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5389

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219854 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-15 21:54:35 +00:00
Chris Bieneman 0df98b6821 Updating documentation as per Chandler's feedback.
This goes with the earlier commit to remove the static destructor from ManagedStatic.cpp by controlling the allocation and de-allocation of the mutex.

Summary: This is part of the ongoing work to remove static constructors and destructors.

Reviewers: chandlerc, rnk

Reviewed By: rnk

Subscribers: rnk, llvm-commits

Differential Revision: http://reviews.llvm.org/D5473

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219640 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-13 23:03:45 +00:00
Chris Bieneman 3a143ce2e7 Removing the static destructor from ManagedStatic.cpp by controlling the allocation and de-allocation of the mutex.
This patch adds a new llvm_call_once function which is used by the ManagedStatic implementation to safely initialize a global to avoid static construction and destruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219638 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-13 22:37:25 +00:00
Chris Bieneman be77ea38e6 Converting the ErrorHandlerMutex to a ManagedStatic to avoid the static constructor and destructor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219028 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-03 22:03:12 +00:00
Chris Bieneman 4bb780af42 Adding #ifdef around TermColorMutex based on feedback from Craig Topper.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218401 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-24 18:35:58 +00:00
Chris Bieneman f1a19cd9fc Converting terminalHasColors mutex to a global ManagedStatic to avoid the static destructor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218283 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-22 22:39:20 +00:00
Chris Bieneman 784954db31 Converting InstrProf's error_category to a ManagedStatic to avoid static constructors and destructors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218168 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 23:19:24 +00:00
Chris Bieneman 3b5a0bf93d Converting SpillPlacement's BlockFrequency threshold to a ManagedStatic to avoid static constructors and destructors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218163 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 22:46:28 +00:00
Chris Bieneman 1595b128e9 Converting object's error_category to a ManagedStatic to avoid static constructors and destructors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218160 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 22:09:18 +00:00
Chris Bieneman 73f6823621 Converting the JITDebugLock mutex to a ManagedStatic to avoid the static constructor and destructor.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218154 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 21:38:20 +00:00
Chris Bieneman 7d1a53b823 Converting FuncNames to a ManagedStatic to avoid static constructors and destructors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218151 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 21:07:01 +00:00
Chris Bieneman 4ea1a1185a Eliminating static destructor for the BitCodeErrorCategory by converting to a ManagedStatic.
Summary: This is part of the overall goal of removing static initializers from LLVM.

Reviewers: chandlerc

Reviewed By: chandlerc

Subscribers: chandlerc, llvm-commits

Differential Revision: http://reviews.llvm.org/D5416

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218149 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-19 20:29:02 +00:00
Chris Bieneman 0a1dc0d78f Fixing the sanitizer build failure:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux/builds/12868/steps/annotate/logs/stdio

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217987 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-17 22:09:38 +00:00
Chris Bieneman 6ba12f9f72 Fixing a build error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217983 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-17 21:06:59 +00:00
Chris Bieneman 14f9a54a8b Refactoring SimplifyLibCalls to remove static initializers and generally cleaning up the code.
Summary: This eliminates ~200 lines of code mostly file scoped struct definitions that were unnecessary.

Reviewers: chandlerc, resistor

Reviewed By: resistor

Subscribers: morisset, resistor, llvm-commits

Differential Revision: http://reviews.llvm.org/D5364

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217982 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-17 20:55:46 +00:00
Chris Bieneman 901166c939 Enabling LLVM & Clang to be cross-compiled using CMake from a single configuration command line
The basic idea is similar to the existing cross compilation support. A directory must be configured to build host versions of tablegen tools and llvm-config. This directory can be user provided (and configured), or it can be created during the build. During a build the native build directory will be configured and built to supply the tablegen tools used during the build. A user could also explicitly provide the tablegen executables to run on the CMake command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217105 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-03 23:21:18 +00:00
Chris Bieneman b9053f6cbc Removing static initializer from Debug.cpp by converting to a ManagedStatic.
This is part of our larger effort to remove static initializers from LLVM libraries.

Reviewed by: chandlerc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217053 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-03 17:50:14 +00:00
Chris Bieneman 16632ce4c7 Cleaning up remaining static initializers in Signals.inc
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216996 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-02 23:48:13 +00:00
Chris Bieneman d814e38de8 Cleaning up static initializers in Signals.inc
Reviewed by: Chandlerc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216704 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 01:05:16 +00:00
Chris Bieneman 77bf4f97bf Cleaning up static initializers in TimeValue.
Code reviewed by Chandlerc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216703 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-29 01:05:12 +00:00
Chris Bieneman ec7a144603 [RegisterCoalescer] Moving the RegisterCoalescer subtarget hook onto the TargetRegisterInfo instead of the TargetSubtargetInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213188 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-16 20:13:31 +00:00
Chris Bieneman 4722b28a3e Added documentation for SizeMultiplier in the ARM subtarget hook for register coalescing. Also fixed some 80 col violations.
No functional code changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213169 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-16 16:27:31 +00:00
Chris Bieneman 01d8611240 [RegisterCoalescer] Add new subtarget hook allowing targets to opt-out of coalescing.
The coalescer is very aggressive at propagating constraints on the register classes, and the register allocator doesn’t know how to split sub-registers later to recover. This patch provides an escape valve for targets that encounter this problem to limit coalescing.

This patch also implements such for ARM to lower register pressure when using lots of large register classes. This works around PR18825.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213078 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-15 17:18:41 +00:00