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Roman Tereshin 6d26638c90 [GlobalISel][Legalizer] Widening the second src op of shifts bug fix 
The second source operand of G_SHL, G_ASHR, and G_LSHR must preserve its
value as a (small) unsigned integer, therefore its incorrect to widen it
in any way but by zero extending it.

G_SHL was using G_ANYEXT and G_ASHR - G_SEXT (which is correct for their
destination and first source operands, but not the "number of bits to
shift" operand).

Generally, shifts aren't as similar to regular binary operations as it
might seem, for instance, they aren't commutative nor associative and
the second source operand usually requires a special treatment.

Reviewers: bogner, javed.absar, aivchenk, rovka

Reviewed By: bogner

Subscribers: igorb, kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D46413

llvm-svn: 331926
 		2018-05-09 21:43:30 +00:00
clang [Clang] Implement function attribute no_stack_protector. 2018-05-09 21:41:18 +00:00
clang-tools-extra [tools] Updating PPCallbacks::InclusionDirective calls 2018-05-09 18:27:37 +00:00
compiler-rt [CMake] Build shared version of runtimes for Fuchsia 2018-05-09 21:24:06 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc remquo: Flush denormals if not supported 2018-05-03 05:44:28 +00:00
libcxx Allow copy elision in path concatenation 2018-05-09 18:57:17 +00:00
libcxxabi Fix test failure for missing _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 2018-05-03 12:44:27 +00:00
libunwind [cmake] Remove duplicate command line options from build 2018-04-05 20:27:50 +00:00
lld [COFF] Fix dangling StringRefs from SVN 331900 2018-05-09 19:07:10 +00:00
lldb [cmake, unittests] Fix the CMake file for the LLDB unittests to support multiple configurations 2018-05-09 19:58:51 +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][Legalizer] Widening the second src op of shifts bug fix 2018-05-09 21:43:30 +00:00
openmp [OMPT] Fix thread_num for implicit_task_end callbacks in nested parallel regions 2018-05-07 12:42:21 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [ScopInfo] Remove bail out condition in buildMinMaxAccess(). 2018-05-09 16:23:56 +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.