Arnold Schwaighofer ae4e1a94e3 LoopVectorizer: Disallow reductions whose header phi is used outside the loop ... If an outside loop user of the reduction value uses the header phi node we cannot just reduce the vectorized phi value in the vector code epilog because we would loose VF-1 reductions. lp: p = phi (0, lv) lv = lv + 1 ... brcond , lp, outside outside: usr = add 0, p (Say the loop iterates two times, the value of p coming out of the loop is one). We cannot just transform this to: vlp: p = phi (<0,0>, lv) lv = lv + <1,1> .. brcond , lp, outside outside: p_reduced = p[0] + [1]; usr = add 0, p_reduced (Because the original loop iterated two times the vectorized loop would iterate one time, but p_reduced ends up being zero instead of one). We would have to execute VF-1 iterations in the scalar remainder loop in such cases. For now, just disable vectorization. PR16522 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186256 91177308-0d34-0410-b5e6-96231b3b80d8		2013-07-13 19:09:29 +00:00
..
Analysis	Fix logic error optimizing "icmp pred (urem X, Y), Y" where pred is signed.	2013-07-12 23:42:57 +00:00
AsmParser	Target/X86: Add explicit Win64 and System V/x86-64 calling conventions.	2013-07-12 06:02:35 +00:00
Bitcode	Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.	2013-07-11 16:22:38 +00:00
CodeGen	Pass SmallVector by const reference instead of by value.	2013-07-13 07:43:40 +00:00
DebugInfo	Spell correct (s/begining/beginning/)	2013-06-19 21:42:05 +00:00
ExecutionEngine	Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.	2013-07-04 01:31:24 +00:00
IR	Target/X86: Add explicit Win64 and System V/x86-64 calling conventions.	2013-07-12 06:02:35 +00:00
IRReader	keep only the StringRef version of getFileOrSTDIN.	2013-06-25 05:28:34 +00:00
Linker
MC	Put ELF COMDAT relocations into the relevant COMDAT group.	2013-07-10 20:58:17 +00:00
Object	Change llvm-ar to use lib/Object.	2013-07-12 20:21:39 +00:00
Option	Fix a crash bug in dumping options with groups	2013-06-26 22:43:37 +00:00
Support	Windows/TimeValue.inc: Mute prefixed '0' on %d to emulate %e.	2013-07-12 02:13:03 +00:00
TableGen	keep only the StringRef version of getFileOrSTDIN.	2013-06-25 05:28:34 +00:00
Target	Reduce large list of macros to the primary platform macros. Distingiush	2013-07-13 17:59:55 +00:00
Transforms	LoopVectorizer: Disallow reductions whose header phi is used outside the loop	2013-07-13 19:09:29 +00:00
CMakeLists.txt	Move lib/Archive to tools/llvm-ar.	2013-06-17 15:47:20 +00:00
LLVMBuild.txt	Move lib/Archive to tools/llvm-ar.	2013-06-17 15:47:20 +00:00
Makefile	Move lib/Archive to tools/llvm-ar.	2013-06-17 15:47:20 +00:00