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Roman Tereshin 8d6ff4c0af [MachineCSE][GlobalISel] Making sure MachineCSE works mid-GlobalISel (again) 
Change of approach, it looks like it's a much better idea to deal with
the vregs that have LLTs and reg classes both properly, than trying to
avoid creating those across all GlobalISel passes and all targets.

The change mostly touches MachineRegisterInfo::constrainRegClass,
which is apparently only used by MachineCSE. The changes are NFC for
any pipeline but one that contains MachineCSE mid-GlobalISel.

NOTE on isCallerPreservedOrConstPhysReg change in MachineCSE:

    There is no test covering it as the only way to insert a new pass
(MachineCSE) from a command line I know of is llc's -run-pass option,
which only works with MIR, but MIRParser freezes reserved registers upon
MachineFunctions creation, making it impossible to reproduce the state
that exposes the issue.

Reviwed By: aditya_nandakumar

Differential Revision: https://reviews.llvm.org/D53144

llvm-svn: 344822
 		2018-10-20 00:06:15 +00:00
clang Revert "[Driver] Reland: Default Android toolchains to libc++." 2018-10-19 19:23:01 +00:00
clang-tools-extra [clangd] Set workspace root when initializing ClangdServer, disallow mutation. 2018-10-19 15:42:23 +00:00
compiler-rt Revert commit r344670 as the test fails on a bot http://lab.llvm.org:8011/builders/clang-cmake-armv7-full/builds/2683/. 2018-10-19 04:09:32 +00:00
debuginfo-tests Revert "(Retry) Add a basic integration test for C++ smart pointers" 2018-08-20 19:53:33 +00:00
libclc configure: Rework support for gfx9+ devices that were added post LLVM 3.9 2018-09-15 22:02:01 +00:00
libcxx [libcxx] [test] Add missing <stdexcept> to map at tests. 2018-10-19 23:49:15 +00:00
libcxxabi cxa_demangle: make demangler's parsing functions overridable 2018-10-16 14:29:14 +00:00
libunwind [CMake] Link to compiler-rt if LIBUNWIND_USE_COMPILER_RT is ON. 2018-10-08 18:35:00 +00:00
lld [COFF] Fix error handling on duplicates for import library symbols 2018-10-19 06:39:36 +00:00
lldb [PDB] Test variadic function type in PDB 2018-10-19 19:30:59 +00:00
llgo Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm [MachineCSE][GlobalISel] Making sure MachineCSE works mid-GlobalISel (again) 2018-10-20 00:06:15 +00:00
openmp [OpenMP] Convert KMP_DYNAMIC_LIB to a 0 or 1 guard everywhere 2018-10-05 17:59:39 +00:00
parallel-libs Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
polly [TI removal] Generically discuss terminators rather than use the soon to 2018-10-18 07:43:30 +00:00
README.md Update the project name in README.md 2018-10-19 00:03:01 +00:00

README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.