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Sanjay Patel f24900b934 [DAGCombiner] allow hoisting vector bitwise logic ahead of truncates 
The transform performs a bitwise logic op in a wider type followed by
truncate when both inputs are truncated from the same source type:
logic_op (truncate x), (truncate y) --> truncate (logic_op x, y)

There are a bunch of other checks that should prevent doing this when 
it might be harmful.

We already do this transform for scalars in this spot. The vector 
limitation was shared with a check for the case when the operands are 
extended. I'm not sure if that limit is needed either, but that would 
be a separate patch.

Differential Revision: https://reviews.llvm.org/D55448

llvm-svn: 349303
 		2018-12-16 14:57:04 +00:00
clang Thread safety analysis: Allow scoped releasing of capabilities 2018-12-16 14:15:30 +00:00
clang-tools-extra Fix a lit test failure after MallocChecker changes 2018-12-16 00:00:18 +00:00
compiler-rt Improve the comment in previous 2018-12-16 10:24:06 +00:00
debuginfo-tests Set config.lit_tools_dir, which is needed by lit.llvm.initialize. 2018-11-06 21:54:27 +00:00
libclc travis: Add cmake build 2018-11-27 16:07:21 +00:00
libcxx [test] [ctime] Ignore -Wformat-zero-length warnings 2018-12-16 09:18:31 +00:00
libcxxabi [libcxx] Remove bad_array_length 2018-11-29 19:44:57 +00:00
libunwind [AArch64][libunwind] Unwinding support for return address signing 2018-12-14 11:30:12 +00:00
lld ELF: Handle R_ARM_V4BX correctly in PIC output files. 2018-12-15 00:20:17 +00:00
lldb Update the vFile:open: description to note that the flags 2018-12-15 18:40:38 +00:00
llgo Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm [DAGCombiner] allow hoisting vector bitwise logic ahead of truncates 2018-12-16 14:57:04 +00:00
openmp [OpenMP] Fixes for LIBOMP_OMP_VERSION=45/40 2018-12-15 09:23:39 +00:00
parallel-libs Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
polly [CMake] Fix generation of exported targets in build directory 2018-11-06 15:18:17 +00:00
README.md Update the project name in README.md 2018-10-19 00:03:01 +00:00

README.md

The LLVM Compiler Infrastructure

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