llvm/lib
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
..
Analysis Teach computeKnownBits to look through addrspacecast. 2014-07-15 01:55:03 +00:00
AsmParser Update the MemoryBuffer API to use ErrorOr. 2014-07-06 17:43:13 +00:00
Bitcode Fix a bug in the conversion to ErrorOr. 2014-07-04 20:05:56 +00:00
CodeGen [RegisterCoalescer] Add new subtarget hook allowing targets to opt-out of coalescing. 2014-07-15 17:18:41 +00:00
DebugInfo Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
ExecutionEngine [RuntimeDyld] Handle endiannes differences between the host and target while 2014-07-14 23:19:50 +00:00
IR Document the maximum LLVM IR alignment, which is 1 << 29 or 0.5 GiB 2014-07-15 01:16:09 +00:00
IRReader Update the MemoryBuffer API to use ErrorOr. 2014-07-06 17:43:13 +00:00
LineEditor [CMake] Use LINK_LIBS instead of target_link_libraries(). 2014-02-26 06:41:29 +00:00
Linker Include <tuple> to make buildbots happy 2014-06-27 18:38:12 +00:00
LTO Prune Redundant libdeps in CMake's target_link_libraries and LLVMBuild.txt. 2014-07-15 11:37:03 +00:00
MC CodeGen: Stick constant pool entries in COMDAT sections for WinCOFF 2014-07-14 22:57:27 +00:00
Object Object/LLVMBuild.txt: Sort required_libraries by alphabetical order. 2014-07-14 02:52:08 +00:00
Option Generic: add range-adapter for option parsing. 2014-07-09 13:03:37 +00:00
ProfileData Update the MemoryBuffer API to use ErrorOr. 2014-07-06 17:43:13 +00:00
Support Fix a -Wunused-local-typedefs warning 2014-07-14 22:46:45 +00:00
TableGen Update the MemoryBuffer API to use ErrorOr. 2014-07-06 17:43:13 +00:00
Target [RegisterCoalescer] Add new subtarget hook allowing targets to opt-out of coalescing. 2014-07-15 17:18:41 +00:00
Transforms MergeFunc patch from Björn Steinbrink. 2014-07-15 10:46:51 +00:00
CMakeLists.txt ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00
LLVMBuild.txt ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00
Makefile ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00