Andrea Di Biagio f033db57e9 [TTI] Improved cost heuristic for cttz/ctlz calls. ...

This patch is a follow-up of r228826 (see code-review: D7506).

Now that SimplifyCFG uses TargetTransformInfo for cost analysis, we 
have to fix the cost heuristic for intrinsic calls to cttz/ctlz.

This patch defines method 'getIntrinsicCost' in BasicTTIImpl: now, BasicTTIImpl
queries TLI to check if a call to cttz/ctlz is cheap for the target.

Added test cases in Transforms/SimplifyCFG/X86 to verify that on x86,
SimplifyCFG only speculates a call to cttz/ctlz if it is cheap.

Differential Revision: http://reviews.llvm.org/D7554


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228829 91177308-0d34-0410-b5e6-96231b3b80d8

2015-02-11 14:22:18 +00:00

..

ADT

ADT: Allow up to 18 arguments in hash_combine()

2015-02-09 23:21:05 +00:00

Analysis

Don't promote asynch EH invokes of nounwind functions to calls

2015-02-11 01:23:16 +00:00

AsmParser

Pass a MemoryBufferRef when we can avoid taking ownership.

2014-08-26 21:49:01 +00:00

Bitcode

IR: Assembly and bitcode for GenericDebugNode

2015-02-03 21:54:14 +00:00

CodeGen

[TTI] Improved cost heuristic for cttz/ctlz calls.

2015-02-11 14:22:18 +00:00

Config

Define HAVE_DIA_SDK on Windows when DIA is present.

2015-02-10 05:04:25 +00:00

DebugInfo

Rewrite llvm-pdbdump in terms of LLVMDebugInfoPDB.

2015-02-10 22:43:25 +00:00

ExecutionEngine

[Orc] Fix a bug in the LazyEmittingLayer - capture names by value (as

2015-02-10 07:35:39 +00:00

IR

Adding support for llvm.eh.begincatch and llvm.eh.endcatch intrinsics and beginning the documentation of native Windows exception handling.

2015-02-10 19:52:43 +00:00

IRReader

Pass a MemoryBufferRef when we can avoid taking ownership.

2014-08-26 21:49:01 +00:00

LineEditor

[C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API.

2014-04-21 09:34:48 +00:00

Linker

Use the DiagnosticHandler to print diagnostics when reading bitcode.

2015-01-10 00:07:30 +00:00

LTO

[LTO API] split lto_codegen_compile to lto_codegen_optimize and

2015-02-03 18:39:15 +00:00

MC

[MC] Remove various unused MCAsmInfo parameters.

2015-02-05 00:58:51 +00:00

Object

dd the option, -link-opt-hints to llvm-objdump used with -macho to print the

2015-01-27 21:28:24 +00:00

Option

Add an overload of getLastArgNoClaim taking two OptSpecifiers.

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

ProfileData

InstrProf: Make CounterMappingRegions less confusing to construct

2015-02-03 23:59:33 +00:00

Support

Now use the __debugbreak intrinsic instead of calling RaiseException; it requires no forward declares and still calls VEH.

2015-02-10 21:13:04 +00:00

TableGen

Make MultiClass::DefPrototypes own their Records to fix memory leaks.

2014-12-11 05:25:33 +00:00

Target

[CodeGen] Add hook/combine to form vector extloads, enabled on X86.

2015-02-05 18:31:02 +00:00

Transforms

Add missing include.

2015-02-04 18:16:53 +00:00

CMakeLists.txt

Remove llvm_headers_do_not_build for the benefit of XCode and Visual Studio users.

2014-08-14 00:51:47 +00:00

InitializePasses.h

Introduce print-memderefs to test isDereferenceablePointer

2015-02-06 01:46:42 +00:00

LinkAllIR.h

[cleanup] Move the Dominators.h and Verifier.h headers into the IR

2014-01-13 09:26:24 +00:00

LinkAllPasses.h

Introduce print-memderefs to test isDereferenceablePointer

2015-02-06 01:46:42 +00:00

module.modulemap

Bring the modules buildbot back to life after r226940.

2015-01-24 01:55:52 +00:00

module.modulemap.build

[modules] Add module maps for LLVM. These are not quite ready for prime-time

2014-05-21 02:46:14 +00:00

Pass.h

Revert "[PM] Add pass run listeners to the pass manager."

2014-05-15 17:49:20 +00:00

PassAnalysisSupport.h

[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

2014-04-14 00:51:57 +00:00

PassInfo.h

Remove pimpl class from PassRegistry.

2014-06-12 16:06:51 +00:00

PassManager.h

Move the old pass manager infrastructure into a legacy namespace and

2013-11-09 12:26:54 +00:00

PassRegistry.h

[PM] Remove an unused and rather expensive mapping from an analysis

2014-10-06 00:30:59 +00:00

PassSupport.h

Defining a new API for debug options that doesn't rely on static global cl::opts.

2014-10-15 21:54:35 +00:00