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Daniel Jasper 8f239f83b0 During PHI elimination, split critical edges that move copies out of loops. 
This prevents the behavior observed in llvm.org/PR22369. I am not sure
whether I am reading the code correctly, but the early exit based on
isLiveOutPastPHIs() seems to make the wrong assumption that
RegisterCoalescer won't be able to coalesce those copies later.

This change hides the new behavior behind -no-phi-elim-live-out-early-exit
as it currently breaks four tests:
 * Assertion in:
     CodeGen/Hexagon/hwloop-cleanup.ll
 * Worse code in:
     CodeGen/X86/coalescer-commute4.ll
     CodeGen/X86/phys_subreg_coalesce-2.ll
     CodeGen/X86/zlib-longest-match.ll
   The root cause here seems to be that the heuristic that determines
   the visitation order in RegisterCoalescer gets less lucky.

llvm-svn: 231064
 		2015-03-03 10:23:11 +00:00
..
Analysis TLI: Factor out sanitizeFunctionName. NFC. 2015-03-02 23:24:40 +00:00
AsmParser Cleanup after r230934 per Dave's suggestions. 2015-03-03 05:39:27 +00:00
Bitcode Add missing includes. make_unique proliferated everywhere. 2015-03-01 21:28:53 +00:00
CodeGen During PHI elimination, split critical edges that move copies out of loops. 2015-03-03 10:23:11 +00:00
DebugInfo [llvm-pdbdump] Many minor fixes and improvements 2015-03-02 04:39:56 +00:00
ExecutionEngine Add missing includes. make_unique proliferated everywhere. 2015-03-01 21:28:53 +00:00
Fuzzer [fuzzer] one more experimental search mode: -use_coverage_pairs=1 2015-02-20 03:02:37 +00:00
IR AsmWriter: Only print one space after the load type 2015-03-02 15:24:41 +00:00
IRReader Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects. 2015-02-11 03:28:02 +00:00
LTO [LTO API] fix memory leakage introduced at r230290. 2015-02-25 21:20:53 +00:00
LineEditor Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects. 2015-02-11 03:28:02 +00:00
Linker Restore LLVMLinkModules C API until it is properly deprecated. 2015-03-02 18:59:38 +00:00
MC Remove useless .debug_macinfo section setup. 2015-03-02 19:52:42 +00:00
Object Use read{16,32,64}{le,be}() instead of *reinterpret_cast<u{little,big}{16,32,64}_t>(). 2015-03-02 21:19:12 +00:00
Option Prefer SmallVector::append/insert over push_back loops. 2015-02-17 15:29:18 +00:00
ProfileData Add missing includes. make_unique proliferated everywhere. 2015-03-01 21:28:53 +00:00
Support Use read{16,32,64}{le,be}() instead of *reinterpret_cast<u{little,big}{16,32,64}_t>(). 2015-03-02 21:19:12 +00:00
TableGen Add missing includes. make_unique proliferated everywhere. 2015-03-01 21:28:53 +00:00
Target [X86] Remove some unused code from disassembler. 2015-03-03 05:24:03 +00:00
Transforms LowerBitSets: Use byte arrays instead of bit sets to represent in-memory bit sets. 2015-03-03 00:49:28 +00:00
CMakeLists.txt Reverting r227452, which adds back the fuzzer library. Now excluding the fuzzer library based on LLVM_USE_SANITIZE_COVERAGE being set or unset. 2015-01-29 16:58:29 +00:00
LLVMBuild.txt
…
Makefile Move DebugInfo to DebugInfo/DWARF. 2015-01-30 18:07:45 +00:00