Andrea Di Biagio a5ab9baf83 [X86][SchedModel] SSE reciprocal square root instruction latencies. ...

The SSE rsqrt instruction (a fast reciprocal square root estimate) was
grouped in the same scheduling IIC_SSE_SQRT* class as the accurate (but very
slow) SSE sqrt instruction. For code which uses rsqrt (possibly with
newton-raphson iterations) this poor scheduling was affecting performances.

This patch splits off the rsqrt instruction from the sqrt instruction scheduling
classes and creates new IIC_SSE_RSQER* classes with latency values based on
Agner's table.

Differential Revision: http://reviews.llvm.org/D5370

Patch by Simon Pilgrim.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218517 91177308-0d34-0410-b5e6-96231b3b80d8

2014-09-26 12:56:44 +00:00

..

Analysis

Fix assertion in LICM doFinalization()

2014-09-24 16:48:31 +00:00

AsmParser

Make CallingConv::ID an alias of "unsigned".

2014-09-10 18:00:17 +00:00

Bitcode

Do not destroy external linkage when deleting function body

2014-09-23 12:54:19 +00:00

CodeGen

Revert patch ofr218493

2014-09-26 02:28:03 +00:00

DebugInfo

Revert "Store TypeUnits in a SmallVector<DWARFUnitSection> instead of a single DWARFUnitSection."

2014-09-26 12:34:06 +00:00

ExecutionEngine

[MCJIT] Fix some more RuntimeDyld debugging output format specifiers.

2014-09-23 19:20:57 +00:00

IR

DIBuilder: Delete dead code, NFC

2014-09-19 23:17:58 +00:00

IRReader

Pass a && to getLazyBitcodeModule.

2014-09-03 17:31:46 +00:00

LineEditor

…

Linker

Merge alignment of common GlobalValue.

2014-09-09 17:48:18 +00:00

LTO

LTO: introduce object file-based on-disk module format.

2014-09-18 21:28:49 +00:00

MC

MC: Use @IMGREL instead of @IMGREL32, which we can't parse

2014-09-25 02:09:18 +00:00

Object

Converting object's error_category to a ManagedStatic to avoid static constructors and destructors.

2014-09-19 22:09:18 +00:00

Option

Add an overload of getLastArgNoClaim taking two OptSpecifiers.

2014-09-12 19:42:53 +00:00

ProfileData

llvm-cov: Combine segments that cover the same location

2014-09-25 00:34:18 +00:00

Support

Support: Remove undefined behavior from &raw_ostream::operator<<

2014-09-26 02:48:14 +00:00

TableGen

Refactoring: raw pointer -> unique_ptr

2014-09-25 19:55:58 +00:00

Target

[X86][SchedModel] SSE reciprocal square root instruction latencies.

2014-09-26 12:56:44 +00:00

Transforms

[asan] don't instrument module CTORs that may be run before asan.module_ctor. This fixes asan running together -coverage

2014-09-24 22:41:55 +00:00

CMakeLists.txt

…

LLVMBuild.txt

…

Makefile

…