llvm-project/clang
Jon Chesterfield dbd7bad9ad [openmp] Annotate tmp variables with omp_thread_mem_alloc
Fixes miscompile of calls into ocml. Bug 51445.

The stack variable `double __tmp` is moved to dynamically allocated shared
memory by CGOpenMPRuntimeGPU. This is usually fine, but when the variable
is passed to a function that is explicitly annotated address_space(5) then
allocating the variable off-stack leads to a miscompile in the back end,
which cannot decide to move the variable back to the stack from shared.

This could be fixed by removing the AS(5) annotation from the math library
or by explicitly marking the variables as thread_mem_alloc. The cast to
AS(5) is still a no-op once IR is reached.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D107971
2021-08-19 02:22:11 +01:00
..
INPUTS
bindings
cmake [clang][cache] Update Fuchsia-stage2.cmake to create hwasan multilibs 2021-08-10 10:52:24 -07:00
docs [clang-format] NFC update the ClangFormatStyleOption.rst following previous change 2021-08-14 10:41:58 +01:00
examples Fix clang-interpreter build after 2487db1f28 2021-08-05 10:05:36 -07:00
include Implement P1949 2021-08-18 07:33:14 -04:00
lib [openmp] Annotate tmp variables with omp_thread_mem_alloc 2021-08-19 02:22:11 +01:00
runtime Prepare Compiler-RT for GnuInstallDirs, matching libcxx, document all 2021-07-13 15:21:41 +00:00
test [openmp] Annotate tmp variables with omp_thread_mem_alloc 2021-08-19 02:22:11 +01:00
tools [clang-offload-wrapper] Disabled ELF offload notes embedding by default. 2021-08-18 08:18:03 -07:00
unittests [clang-format] Distinguish K&R C function definition and attribute 2021-08-14 05:00:40 -07:00
utils [analyzer] Add option to SATest.py for extra checkers 2021-08-17 10:42:57 +05:30
www Implement P1949 2021-08-18 07:33:14 -04:00
.clang-format
.clang-tidy .clang-tidy: Disable misc-no-recursion in general/across the monorepo 2021-06-08 08:31:33 -07:00
.gitignore
CMakeLists.txt
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/