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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - kmp_settings.cpp fails to compile on Windows with error C2131: expression did not evaluate to a constant"
href="https://bugs.llvm.org/show_bug.cgi?id=48919">48919</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>kmp_settings.cpp fails to compile on Windows with error C2131: expression did not evaluate to a constant
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Runtime Library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hans@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Blocks</th>
<td>48902
</td>
</tr></table>
<p>
<div>
<pre>in a VS 2019 x86 Native Tools Command Prompt
with llvmorg-12.0.0-rc1 checked out
cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON
-DLLVM_ENABLE_PROJECTS="clang;openmp" ..\llvm
ninja omp
C:\src\llvm.monorepo\openmp\runtime\src\kmp_settings.cpp(3358): error C2131:
expression did not evaluate to a constant
C:\src\llvm.monorepo\openmp\runtime\src\kmp_settings.cpp(3358): note: failure
was caused by a read of a variable outside its lifetime
C:\src\llvm.monorepo\openmp\runtime\src\kmp_settings.cpp(3358): note: see usage
of 'ntraits'
Bisection points to
commit 927af4b3c57681e623b8449fb717a447559358d0
Author: Nawrin Sultana <<a href="mailto:nawrin.sultana@intel.com">nawrin.sultana@intel.com</a>>
Date: Mon Nov 2 16:17:37 2020 -0600
[OpenMP] Modify OMP_ALLOCATOR environment variable
This patch sets the def-allocator-var ICV based on the environment
variables
provided in OMP_ALLOCATOR. Previously, only allowed value for OMP_ALLOCATOR
was a predefined memory allocator. OpenMP 5.1 specification allows
predefined
memory allocator, predefined mem space, or predefined mem space with traits
in
OMP_ALLOCATOR. If an allocator can not be created using the provided
environment
variables, the def-allocator-var is set to omp_default_mem_alloc.
Differential Revision: <a href="https://reviews.llvm.org/D94985">https://reviews.llvm.org/D94985</a>
openmp/runtime/src/kmp_settings.cpp | 391 ++++++++++++++++++++++++------
openmp/runtime/test/env/omp51_alloc_env.c | 31 +++
2 files changed, 353 insertions(+), 69 deletions(-)
create mode 100644 openmp/runtime/test/env/omp51_alloc_env.c
As of this morning the same error happens on the main branch too.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] 12.0.0 Release Blockers"
href="https://bugs.llvm.org/show_bug.cgi?id=48902">Bug 48902</a>] [meta] 12.0.0 Release Blockers
</li>
</ul>
</div>
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