Hal Finkel 64fa501b10 Apply the InstCombine fptrunc sqrt optimization to llvm.sqrt ... InstCombine, in visitFPTrunc, applies the following optimization to sqrt calls: (fptrunc (sqrt (fpext x))) -> (sqrtf x) but does not apply the same optimization to llvm.sqrt. This is a problem because, to enable vectorization, Clang generates llvm.sqrt instead of sqrt in fast-math mode, and because this optimization is being applied to sqrt and not applied to llvm.sqrt, sometimes the fast-math code is slower. This change makes InstCombine apply this optimization to llvm.sqrt as well. This fixes the specific problem in PR17758, although the same underlying issue (optimizations applied to libcalls are not applied to intrinsics) exists for other optimizations in SimplifyLibCalls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194935 91177308-0d34-0410-b5e6-96231b3b80d8		2013-11-16 21:29:08 +00:00
..
CMakeLists.txt
InstCombine.h	Add instcombine visitor for addrspacecast	2013-11-15 05:45:08 +00:00
InstCombineAddSub.cpp
InstCombineAndOrXor.cpp	Update the docs to match the function name.	2013-11-13 01:12:01 +00:00
InstCombineCalls.cpp
InstCombineCasts.cpp	Apply the InstCombine fptrunc sqrt optimization to llvm.sqrt	2013-11-16 21:29:08 +00:00
InstCombineCompares.cpp	InstCombine: fold (A >> C) == (B >> C) --> (A^B) < (1 << C) for constant Cs.	2013-11-16 16:00:48 +00:00
InstCombineLoadStoreAlloca.cpp
InstCombineMulDivRem.cpp	InstCombine: Replace manual fast math flag copying with the new IRBuilder RAII helper.	2013-09-30 15:39:59 +00:00
InstCombinePHI.cpp
InstCombineSelect.cpp
InstCombineShifts.cpp
InstCombineSimplifyDemanded.cpp	Remove x86_sse42_crc32_64_8 intrinsic. It has no functional difference from x86_sse42_crc32_32_8 and was not mapped to a clang builtin. I'm not even sure why this form of the instruction is even called out explicitly in the docs. Also add AutoUpgrade support to convert it into the other intrinsic with appropriate trunc and zext.	2013-10-15 05:20:47 +00:00
InstCombineVectorOps.cpp	Scalarize select vector arguments when extracted.	2013-11-04 20:36:06 +00:00
InstCombineWorklist.h
InstructionCombining.cpp	Make gep i8* X, -(ptrtoint Y) transform work with address spaces	2013-10-03 18:15:57 +00:00
LLVMBuild.txt
Makefile