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Yonghong Song e91802f336 bpf: New post-RA peephole optimization pass to eliminate bad RA codegen 
This new pass eliminate identical move:

  MOV rA, rA

This is particularly possible to happen when sub-register support
enabled. The special type cast insn MOV_32_64 involves different
register class on src (i32) and dst (i64), RA could generate useless
instruction due to this.

This pass also could serve as the bast for further post-RA optimization.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327370
 		2018-03-13 06:47:06 +00:00
clang Add missing "env" so that test added in r327322 passes on Windows bots. 2018-03-13 00:41:44 +00:00
clang-tools-extra Revert "Reland "[clang-doc] Setup clang-doc frontend framework"" 2018-03-12 23:23:24 +00:00
compiler-rt [Sanitizers] Add more standard compliant posix_memalign implementation for LSan. 2018-03-12 21:59:06 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc nan: Implement 2018-03-12 19:46:52 +00:00
libcxx [libcxx][test] Adding apple-clang-9 to UNSUPPORTED in iter_alloc_deduction.fail.cpp. 2018-03-12 18:06:37 +00:00
libcxxabi [demangler] Simplify printing of structured bindings. 2018-03-10 22:33:49 +00:00
libunwind [libunwind][MIPS]: Add support for unwinding in N32 processes. 2018-02-27 21:24:02 +00:00
lld Use PLT relocations in test. 2018-03-13 01:41:49 +00:00
lldb [ExpressionParser] Fix crash when evaluating invalid expresssions. 2018-03-13 01:40:00 +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 bpf: New post-RA peephole optimization pass to eliminate bad RA codegen 2018-03-13 06:47:06 +00:00
openmp fix a typo on the website 2018-03-11 10:53:40 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [polly] Change std::sort to llvm::sort in response to r327219 2018-03-13 05:25:23 +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.