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Guozhi Wei 0eb86c8efc [DAGCombiner] Fold (zext (and/or/xor (shl/shr (load x), cst), cst)) 
In our real world application, we found the following optimization is missed in DAGCombiner

(zext (and/or/xor (shl/shr (load x), cst), cst)) -> (and/or/xor (shl/shr (zextload x), (zext cst)), (zext cst))

If the user of original zext is an add, it may enable further lea optimization on x86.

This patch add a new function CombineZExtLogicopShiftLoad to do this optimization.

Differential Revision: https://reviews.llvm.org/D44402

llvm-svn: 329516
 		2018-04-07 23:36:10 +00:00
clang [libclang] Add clang_File_tryGetRealPathName 2018-04-07 20:50:35 +00:00
clang-tools-extra [clang-tidy] Fix compilation for MSVS@PSP4 for ParentVirtualCallCheck.cpp 2018-04-07 11:22:01 +00:00
compiler-rt [libFuzzer] Print a correct error message when a directory can't be 2018-04-06 18:15:24 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc select: simplify implementation and fix fp16 2018-04-06 22:00:00 +00:00
libcxx [libcxx][test] Silence -Wself-assign diagnostics 2018-04-07 10:36:03 +00:00
libcxxabi [CMake] Support for monorepo layout 2018-04-04 17:40:59 +00:00
libunwind [cmake] Remove duplicate command line options from build 2018-04-05 20:27:50 +00:00
lld [tests] Fix format-binary-non-ascii.s to work with Python 3 on Windows 2018-04-07 00:55:26 +00:00
lldb [lldb-server] Set a more generous timeout when testing gdbremote. 2018-04-06 17:17:20 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [DAGCombiner] Fold (zext (and/or/xor (shl/shr (load x), cst), cst)) 2018-04-07 23:36:10 +00:00
openmp [OpenMP] enable bc file compilation using the latest clang 2018-04-03 15:01:34 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [doc] Overhaul doc on preparing IR for processing by Polly. 2018-04-06 19:24:18 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.