Hal Finkel f0c1388dd1 Improve instruction scheduling for the PPC POWER7 ... Aside from a few minor latency corrections, the major change here is a new hazard recognizer which focuses on better dispatch-group formation on the POWER7. As with the PPC970's hazard recognizer, the most important thing it does is avoid load-after-store hazards within the same dispatch group. It uses the POWER7's special dispatch-group-terminating nop instruction (instead of inserting multiple regular nop instructions). This new hazard recognizer makes use of the scheduling dependency graph itself, built using AA information, to robustly detect the possibility of load-after-store hazards. significant test-suite performance changes (the error bars are 99.5% confidence intervals based on 5 test-suite runs both with and without the change -- speedups are negative): speedups: MultiSource/Benchmarks/FreeBench/pcompress2/pcompress2 -0.55171% +/- 0.333168% MultiSource/Benchmarks/TSVC/CrossingThresholds-dbl/CrossingThresholds-dbl -17.5576% +/- 14.598% MultiSource/Benchmarks/TSVC/Reductions-dbl/Reductions-dbl -29.5708% +/- 7.09058% MultiSource/Benchmarks/TSVC/Reductions-flt/Reductions-flt -34.9471% +/- 11.4391% SingleSource/Benchmarks/BenchmarkGame/puzzle -25.1347% +/- 11.0104% SingleSource/Benchmarks/Misc/flops-8 -17.7297% +/- 9.79061% SingleSource/Benchmarks/Shootout-C++/ary3 -35.5018% +/- 23.9458% SingleSource/Regression/C/uint64_to_float -56.3165% +/- 25.4234% SingleSource/UnitTests/Vectorizer/gcc-loops -18.5309% +/- 6.8496% regressions: MultiSource/Benchmarks/ASCI_Purple/SMG2000/smg2000 18.351% +/- 12.156% SingleSource/Benchmarks/Shootout-C++/methcall 27.3086% +/- 14.4733% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197099 91177308-0d34-0410-b5e6-96231b3b80d8		2013-12-12 00:19:11 +00:00
..
Analysis	Don't #include heavy Dominators.h file in LoopInfo.h. This change reduces	2013-12-07 21:20:17 +00:00
AsmParser
Bitcode	Remove unused value.	2013-12-07 02:27:52 +00:00
CodeGen	Fix an over-constrained assertion in MachineFunction::addLiveIn.	2013-12-12 00:15:47 +00:00
DebugInfo
ExecutionEngine	Prune redundant dependencies in LLVMBuild.txt.	2013-12-11 00:30:57 +00:00
IR	GCOV.cpp: Use PRIu64 instead of %lu.	2013-12-10 05:39:40 +00:00
IRReader
Linker
LTO	Prune redundant dependencies in LLVMBuild.txt.	2013-12-11 00:30:57 +00:00
MC	Revert "DebugInfo: Move type units into the debug_types section with appropriate comdat grouping and type unit headers"	2013-12-11 22:08:39 +00:00
Object
Option
Support	Expose FileCheck's AddFixedStringToRegEx as Regex::escape	2013-12-12 00:06:41 +00:00
TableGen
Target	Improve instruction scheduling for the PPC POWER7	2013-12-12 00:19:11 +00:00
Transforms	Prune redundant dependencies in LLVMBuild.txt.	2013-12-11 00:30:57 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile