Hal Finkel eb5a560e00 Adjust PPC A2 input operand latencies ...

On the PPC A2, instructions are only issued after their input operands are
ready. Model this by specifying that input operands are read at dispatch (0
cycles after issue). This changes all input operand latencies from 1 to 0.

Significant test-suite performance changes (these are 99.5% confidence
intervals on 6 runs for both before and after):

speedups:
MultiSource/Benchmarks/sim/sim
	-1.21915% +/- 0.175063%
MultiSource/Benchmarks/TSVC/LinearDependence-flt/LinearDependence-flt
	-1.23946% +/- 1.05133%
SingleSource/Benchmarks/Misc/flops-2
	-1.24237% +/- 0.681362%
MultiSource/Applications/JM/lencod/lencod
	-1.33992% +/- 0.757498%
MultiSource/Benchmarks/TSVC/InductionVariable-flt/InductionVariable-flt
	-1.51802% +/- 1.21468%
MultiSource/Benchmarks/TSVC/GlobalDataFlow-flt/GlobalDataFlow-flt
	-2.18818% +/- 1.28605%
MultiSource/Benchmarks/TSVC/Packing-flt/Packing-flt
	-2.21977% +/- 1.19499%
SingleSource/Benchmarks/BenchmarkGame/spectral-norm
	-2.29822% +/- 0.671871%
MultiSource/Benchmarks/TSVC/Packing-dbl/Packing-dbl
	-2.40975% +/- 0.355931%
SingleSource/Benchmarks/Misc/fp-convert
	-2.41899% +/- 1.04751%
MultiSource/Benchmarks/TSVC/Searching-dbl/Searching-dbl
	-2.50349% +/- 0.126765%
SingleSource/Benchmarks/Misc/flops-3
	-3.00214% +/- 0.700795%
MultiSource/Benchmarks/TSVC/LoopRestructuring-flt/LoopRestructuring-flt
	-3.56995% +/- 3.2929%
MultiSource/Applications/sgefa/sgefa
	-4.24908% +/- 2.00413%
MultiSource/Benchmarks/ASC_Sequoia/IRSmk/IRSmk
	-18.1294% +/- 3.96489%

regressions:
MultiSource/Benchmarks/TSVC/Reductions-dbl/Reductions-dbl
	1.03249% +/- 0.178547%
MultiSource/Applications/hexxagon/hexxagon
	1.16597% +/- 0.285235%
MultiSource/Benchmarks/TSVC/IndirectAddressing-flt/IndirectAddressing-flt
	1.39576% +/- 1.07855%
SingleSource/Benchmarks/Misc-C++/stepanov_v1p2
	1.71539% +/- 0.173182%
MultiSource/Benchmarks/Fhourstones-3.1/fhourstones3.1
	1.90013% +/- 0.866472%
MultiSource/Benchmarks/TSVC/Recurrences-dbl/Recurrences-dbl
	2.39854% +/- 1.05914%
MultiSource/Benchmarks/TSVC/ControlFlow-dbl/ControlFlow-dbl
	2.4402% +/- 0.817904%
MultiSource/Benchmarks/TSVC/LoopRestructuring-dbl/LoopRestructuring-dbl
	5.87997% +/- 3.3172%
MultiSource/Benchmarks/Trimaran/netbench-crc/netbench-crc
	9.02643% +/- 5.79591%
MultiSource/Benchmarks/VersaBench/bmm/bmm
	10.3517% +/- 1.227%

Obviously, there are data points on both sides of this; but I think, overall,
this supports making the change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195951 91177308-0d34-0410-b5e6-96231b3b80d8

2013-11-29 07:04:59 +00:00

..

Analysis

[PM] Split the CallGraph out from the ModulePass which creates the

2013-11-26 04:19:30 +00:00

AsmParser

Make it explicit that nulls are not allowed in names.

2013-11-19 21:12:39 +00:00

Bitcode

Fix spacing, forward declare order.

2013-11-18 02:51:33 +00:00

CodeGen

Teach LocalStackSlotAllocation that stackmaps/patchpoints don't have range

2013-11-29 06:35:30 +00:00

DebugInfo

DebugInfo: Avoid emitting pubtype entries for type DIEs that just indirect to a type unit.

2013-11-26 00:22:37 +00:00

ExecutionEngine

Use the mangler consistently instead of using getGlobalPrefix directly.

2013-11-28 08:59:52 +00:00

IR

Fix spurious return introduced by my earlier patch to DebugInfo

2013-11-26 18:54:37 +00:00

IRReader

[llvm-c] Expose IRReader interface

2013-11-06 09:21:15 +00:00

Linker

Revert "Move copying of global initializers below the cloning of functions."

2013-11-09 00:43:18 +00:00

LTO

Use array_pod_sort instead of std::sort

2013-11-16 16:15:56 +00:00

MC

The global prefix is always one char. Don't use a string for it.

2013-11-28 17:00:49 +00:00

Object

Path: Recognize COFF import library file magic.

2013-11-15 21:22:02 +00:00

Option

Use startswith_lower() where possible.

2013-11-04 19:22:50 +00:00

Support

Lift self-copy protection up to the header file and add self-move

2013-11-26 00:54:44 +00:00

TableGen

Fix most memory leaks in tablegen.

2013-10-31 04:07:41 +00:00

Target

Adjust PPC A2 input operand latencies

2013-11-29 07:04:59 +00:00

Transforms

Rein in overzealous InstCombine of fptrunc(OP(fpextend, fpextend)).

2013-11-28 21:38:05 +00:00

CMakeLists.txt

Move LTO support library to a component, allowing it to be tested

2013-09-24 23:52:22 +00:00

LLVMBuild.txt

Move LTO support library to a component, allowing it to be tested

2013-09-24 23:52:22 +00:00

Makefile

Reformat Makefile. No other changes.

2013-10-30 04:03:03 +00:00