llvm-project/llvm/lib/Transforms/Vectorize
David Majnemer 0f26b0aeb4 [CodeGen] Teach LLVM how to lower @llvm.{min,max}num to {MIN,MAX}NAN
The behavior of {MIN,MAX}NAN differs from that of {MIN,MAX}NUM when only
one of the inputs is NaN: -NUM will return the non-NaN argument while
-NAN would return NaN.

It is desirable to lower to @llvm.{min,max}num to -NAN if they don't
have a native instruction for -NUM.  Notably, ARMv7 NEON's vmin has the
-NAN semantics.

N.B.  Of course, it is only safe to do this if the intrinsic call is
marked nnan.

llvm-svn: 266279
2016-04-14 07:13:24 +00:00
..
BBVectorize.cpp [CodeGen] Teach LLVM how to lower @llvm.{min,max}num to {MIN,MAX}NAN 2016-04-14 07:13:24 +00:00
CMakeLists.txt Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects. 2015-02-11 03:28:02 +00:00
LLVMBuild.txt Update libdeps since TLI was moved from Target to Analysis in r226078. 2015-01-15 05:21:00 +00:00
LoopVectorize.cpp [CodeGen] Teach LLVM how to lower @llvm.{min,max}num to {MIN,MAX}NAN 2016-04-14 07:13:24 +00:00
SLPVectorizer.cpp [CodeGen] Teach LLVM how to lower @llvm.{min,max}num to {MIN,MAX}NAN 2016-04-14 07:13:24 +00:00
Vectorize.cpp [PM] Remove the old 'PassManager.h' header file at the top level of 2015-02-13 10:01:29 +00:00