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Sanjay Patel 7939d7229d Use broadcasts to optimize overall size when loading constant splat vectors (x86-64 with AVX or AVX2). 
We generate broadcast instructions on CPUs with AVX2 to load some constant splat vectors.
This patch should preserve all existing behavior with regular optimization levels, 
but also use splats whenever possible when optimizing for *size* on any CPU with AVX or AVX2.

The tradeoff is up to 5 extra instruction bytes for the broadcast instruction to save
at least 8 bytes (up to 31 bytes) of constant pool data.

Differential Revision: http://reviews.llvm.org/D5347

llvm-svn: 218263
 		2014-09-22 18:54:01 +00:00
..
Analysis Add two thresholds lvi-overdefined-BB-threshold and lvi-overdefined-threshold 2014-09-22 02:23:05 +00:00
AsmParser Make CallingConv::ID an alias of "unsigned". 2014-09-10 18:00:17 +00:00
Bitcode Eliminating static destructor for the BitCodeErrorCategory by converting to a ManagedStatic. 2014-09-19 20:29:02 +00:00
CodeGen Refactor reciprocal square root estimate into target-independent function; NFC. 2014-09-21 15:19:15 +00:00
DebugInfo [dwarfdump] Dump full filenames as DW_AT_(decl|call)_file attribute values 2014-09-22 12:36:04 +00:00
ExecutionEngine Remove redundant if test. 2014-09-21 17:21:56 +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
LTO LTO: introduce object file-based on-disk module format. 2014-09-18 21:28:49 +00:00
LineEditor [CMake] Use LINK_LIBS instead of target_link_libraries(). 2014-02-26 06:41:29 +00:00
Linker Merge alignment of common GlobalValue. 2014-09-09 17:48:18 +00:00
MC Downgrade DWARF2 section limit error to a warning 2014-09-22 10:45:16 +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: Allow creating CoverageMappings from filenames 2014-09-20 17:19:52 +00:00
Support Add hsail and amdil64 to Triple 2014-09-19 19:52:11 +00:00
TableGen [TableGen] Fully resolve class-instance values before defs in multiclasses 2014-09-16 17:14:13 +00:00
Target Use broadcasts to optimize overall size when loading constant splat vectors (x86-64 with AVX or AVX2). 2014-09-22 18:54:01 +00:00
Transforms Using a deque to manage the stack of nodes is faster here. 2014-09-20 13:29:20 +00:00
CMakeLists.txt ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00
LLVMBuild.txt ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00
Makefile ProfileData: Introduce the InstrProfReader interface and a text reader 2014-03-21 17:24:48 +00:00