Cong Hou a73ffa2206 [LoopVectorizer] Refine loop vectorizer's register usage calculator by ignoring specific instructions. ... (This is the third attempt to check in this patch, and the first two are r255454 and r255460. The once failed test file reg-usage.ll is now moved to test/Transform/LoopVectorize/X86 directory with target datalayout and target triple indicated.) LoopVectorizationCostModel::calculateRegisterUsage() is used to estimate the register usage for specific VFs. However, it takes into account many instructions that won't be vectorized, such as induction variables, GetElementPtr instruction, etc.. This makes the loop vectorizer too conservative when choosing VF. In this patch, the induction variables that won't be vectorized plus GetElementPtr instruction will be added to ValuesToIgnore set so that their register usage won't be considered any more. Differential revision: http://reviews.llvm.org/D15177 llvm-svn: 255691		2015-12-15 22:45:09 +00:00
..
BBVectorize.cpp	Vectorize: Remove implicit ilist iterator conversions, NFC	2015-10-19 22:06:09 +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	[LoopVectorizer] Refine loop vectorizer's register usage calculator by ignoring specific instructions.	2015-12-15 22:45:09 +00:00
Makefile	…
SLPVectorizer.cpp	AlignmentFromAssumptions and SLPVectorizer preserves AA and GlobalsAA	2015-12-11 17:46:01 +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