Sanjay Patel d9b7837012 Use rsqrt (X86) to speed up reciprocal square root calcs ... This is a first step for generating SSE rsqrt instructions for reciprocal square root calcs when fast-math is allowed. For now, be conservative and only enable this for AMD btver2 where performance improves significantly - for example, 29% on llvm/projects/test-suite/SingleSource/Benchmarks/BenchmarkGame/n-body.c (if we convert the data type to single-precision float). This patch adds a two constant version of the Newton-Raphson refinement algorithm to DAGCombiner that can be selected by any target via a parameter returned by getRsqrtEstimate().. See PR20900 for more details: http://llvm.org/bugs/show_bug.cgi?id=20900 Differential Revision: http://reviews.llvm.org/D5658 llvm-svn: 220570		2014-10-24 17:02:16 +00:00
..
Analysis	[InstSimplify] Support constant folding to vector of pointers	2014-10-22 12:18:48 +00:00
AsmParser	Make CallingConv::ID an alias of "unsigned".	2014-09-10 18:00:17 +00:00
Bitcode	clang-format two code snippets to make the next patch easy to read.	2014-10-23 15:20:05 +00:00
CodeGen	Use rsqrt (X86) to speed up reciprocal square root calcs	2014-10-24 17:02:16 +00:00
DebugInfo	[dwarfdump] Dump DW_AT_ranges values inline in the debug_info dump.	2014-10-23 04:08:34 +00:00
ExecutionEngine	[MCJIT] Make repeat calls to MCJIT::getPointerToFunction for declarations safe.	2014-10-22 23:18:42 +00:00
IR	Make getDISubprogram(const Function *F) available in LLVM	2014-10-23 23:46:28 +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: Document the Boolean argument from r218784	2014-10-02 21:11:04 +00:00
MC	Attempt to fix the build after r220439	2014-10-22 22:46:05 +00:00
Object	[Object] Fix MachO's getUuid to return a pointer into the object instead of a dangling ArrayRef.	2014-10-24 15:52:05 +00:00
Option	Add an overload of getLastArgNoClaim taking two OptSpecifiers.	2014-09-12 19:42:53 +00:00
ProfileData	Reduce double set lookups. NFC.	2014-10-10 15:32:50 +00:00
Support	Modernize doxygen comments in Support/Dwarf.h	2014-10-23 04:08:38 +00:00
TableGen	Eliminate some deep std::vector copies. NFC.	2014-10-03 18:33:16 +00:00
Target	Use rsqrt (X86) to speed up reciprocal square root calcs	2014-10-24 17:02:16 +00:00
Transforms	If requested, apply function merging at -O0 too. It's useful there to reduce the time to compile.	2014-10-23 23:49:31 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile