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Roman Tereshin 19da667599 [GlobalISel][InstructionSelect] Removing redundant num operands and nested def operands checks, perf patch 2 
This patch continues a series of patches that decrease time spent by
GlobalISel in its InstructionSelect pass by roughly 60% for -O0 builds
for large inputs as measured on sqlite3-amalgamation
(http://sqlite.org/download.html) targeting AArch64.

This commit specifically removes number of operands checks that are
redundant if the instruction's opcode already guarantees that number
of operands (or more), and also avoids any kind of checks on a def
operand of a nested instruction as everything about it was already
checked at its use.

The expected performance implication is about 3% off InstructionSelect
comparing to the baseline (before the series of patches)

This patch also contains a bit of NFC changes required for further
patches in the series.

Every commit planned shares the same Phabricator Review.

Reviewers: qcolombet, dsanders, bogner, aemerson, javed.absar

Reviewed By: qcolombet

Subscribers: rovka, llvm-commits, kristof.beyls

Differential Revision: https://reviews.llvm.org/D44700

llvm-svn: 332945
 		2018-05-22 04:31:50 +00:00
clang [X86] Prevent inclusion of __wmmintrin_aes.h and __wmmintrin_pclmul.h without including wmmintrin.h 2018-05-22 02:02:13 +00:00
clang-tools-extra Revert "[clangd] Adapt file migration in r332720" 2018-05-18 18:33:21 +00:00
compiler-rt [CMake] Silence unused variable warning in compiler check 2018-05-22 02:53:32 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc Add initial support for half precision builtins 2018-05-17 22:55:30 +00:00
libcxx Missed the tests for the deduction guides for prority_queue 2018-05-22 02:19:38 +00:00
libcxxabi private_typeinfo: limit is_dst_type_derived_from_static_type optimization 2018-05-18 20:51:38 +00:00
libunwind [OR1K] Add the EPCR special-purpose register to register state. 2018-05-16 19:09:48 +00:00
lld Handle --plugin-opt= options as alias options. 2018-05-22 02:53:11 +00:00
lldb Work around some odd instruction single-step behavior on macOS. 2018-05-22 00:06:55 +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 [GlobalISel][InstructionSelect] Removing redundant num operands and nested def operands checks, perf patch 2 2018-05-22 04:31:50 +00:00
openmp [libomptarget-nvptx-bc] Pass found CUDA installations 2018-05-16 17:20:27 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly CodeGen: Add a dwo output file argument to addPassesToEmitFile and hook it up to dwo output. 2018-05-21 20:16:41 +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.