Sanjay Patel d8214db086 fold: sqrt(x * x * y) -> fabs(x) * sqrt(y) ... If a square root call has an FP multiplication argument that can be reassociated, then we can hoist a repeated factor out of the square root call and into a fabs(). In the simplest case, this: y = sqrt(x * x); becomes this: y = fabs(x); This patch relies on an earlier optimization in instcombine or reassociate to put the multiplication tree into a canonical form, so we don't have to search over every permutation of the multiplication tree. Because there are no IR-level FastMathFlags for intrinsics (PR21290), we have to use function-level attributes to do this optimization. This needs to be fixed for both the intrinsics and in the backend. Differential Revision: http://reviews.llvm.org/D5787 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219944 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-16 18:48:17 +00:00
..
Hello	[CMake] Add LLVM_LINK_COMPONENTS to loadable modules, LLVMHello and BugpointPasses, on Win32.	2014-07-13 13:36:48 +00:00
InstCombine	Reapply r219832 - InstCombine: Narrow switch instructions using known bits.	2014-10-16 06:00:46 +00:00
Instrumentation	Use triple's isiOS() and isOSDarwin() methods.	2014-10-09 05:43:30 +00:00
IPO	Add some optional passes around the vectorizer to both better prepare	2014-10-14 00:31:29 +00:00
ObjCARC	Simplify creation of a bunch of ArrayRefs by using None, makeArrayRef or just letting them be implicitly created.	2014-08-27 05:25:25 +00:00
Scalar	TRE: make TRE a bit more aggressive	2014-10-16 03:27:30 +00:00
Utils	fold: sqrt(x * x * y) -> fabs(x) * sqrt(y)	2014-10-16 18:48:17 +00:00
Vectorize	[SLPVectorize] Basic ephemeral-value awareness	2014-10-15 17:35:01 +00:00
CMakeLists.txt	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00
LLVMBuild.txt	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00
Makefile	Extracted ObjCARC.cpp into its own library libLLVMObjCARCOpts in preparation for refactoring the ARC Optimizer.	2013-01-28 01:35:51 +00:00