Zvi Rackover 42694a3a7e [X86] Prefer reduced width multiplication over pmulld on Silvermont ... Summary: Prefer expansions such as: pmullw,pmulhw,unpacklwd,unpackhwd over pmulld. On Silvermont [source: Optimization Reference Manual]: PMULLD has a throughput of 1/11 [instruction/cycles]. PMULHUW/PMULHW/PMULLW have a throughput of 1/2 [instruction/cycles]. Fixes pr31202. Analysis of this issue was done by Fahana Aleen. Reviewers: wmi, delena, mkuper Subscribers: RKSimon, llvm-commits Differential Revision: https://reviews.llvm.org/D27203 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288844 91177308-0d34-0410-b5e6-96231b3b80d8		2016-12-06 19:35:20 +00:00
..
Analysis	[TTI/CostModel] Correct the way getGEPCost() calls isLegalAddressingMode()	2016-12-03 01:57:24 +00:00
Assembler	[DIExpression] Introduce a dedicated DW_OP_LLVM_fragment operation	2016-12-05 18:04:47 +00:00
Bindings
Bitcode	[DIExpression] Introduce a dedicated DW_OP_LLVM_fragment operation	2016-12-05 18:04:47 +00:00
BugPoint
CodeGen	[X86] Prefer reduced width multiplication over pmulld on Silvermont	2016-12-06 19:35:20 +00:00
DebugInfo	[DIExpression] Introduce a dedicated DW_OP_LLVM_fragment operation	2016-12-05 18:04:47 +00:00
Examples
ExecutionEngine
Feature
FileCheck
Instrumentation	[asan/win] Align global registration metadata to its size	2016-11-29 01:32:21 +00:00
Integer
JitListener
LibDriver
Linker	[ThinLTO] Stop importing constant global vars as copies in the backend	2016-12-02 01:02:30 +00:00
LTO	[LTOs] Allow generation of hotness information	2016-12-02 17:53:56 +00:00
MC	[ARM] Better error message for invalid flag-preserving Thumb1 insts	2016-12-06 12:59:08 +00:00
Object	[llvm-readobj] - Teach readobj to print PT_OPENBSD_BOOTDATA header	2016-12-06 17:55:52 +00:00
ObjectYAML	[ObjectYAML] First bit of support for encoding DWARF in MachO	2016-12-06 06:00:49 +00:00
Other
SymbolRewriter
TableGen	[tablegen] Delete duplicates from a vector without skipping elements	2016-12-01 19:38:50 +00:00
ThinLTO/X86	[LTOs] Allow generation of hotness information	2016-12-02 17:53:56 +00:00
tools	[llvm-readobj] - Teach readobj to print PT_OPENBSD_BOOTDATA header	2016-12-06 17:55:52 +00:00
Transforms	[InstSimplify] add folds for and-of-icmps with same operands	2016-12-06 19:05:46 +00:00
Unit
Verifier
YAMLParser
.clang-format
CMakeLists.txt	Add llvm-modextract tool.	2016-11-29 21:54:33 +00:00
lit.cfg	Add llvm-modextract tool.	2016-11-29 21:54:33 +00:00
lit.site.cfg.in
TestRunner.sh