A few places in the loop collapse support code make small dynamic allocations
that introduce a noticeable performance overhead when made on the heap.
This change moves allocations up to 32 bytes to the stack instead of the heap.
Differential Revision: https://reviews.llvm.org/D158220
On some platforms, std::abs may inadvertently pull in a math library.
This patch replaces its use in the new loop collapse code with
a no thrills in-situ implementation.
Differential Revision: https://reviews.llvm.org/D150882
MacOS build of LLVM with OpenMP enabled fails with an error
that it doesn't know what std::abs is. Fix by including <cmath>
so that the relevant function declaration is included.
No functional change intended.
Reviewed By: tianshilei1992
Differential Revision: https://reviews.llvm.org/D150687
Fixes a GCC build issue (an instance of unallowed typename keyword) and reworks memory allocation
to avoid the use of C++ library based primitives ) in and restores the earlier commit https://reviews.llvm.org/D148393
Differential Revision: https://reviews.llvm.org/D149010
This patch caused failures on the OpenMP buildbots as discussed in
https://reviews.llvm.org/D149010. We will need to investigate why we are
seeing unresolved references to the standard C++ library.
This reverts commit 5a15ca7f10bcba55a2f51281b1562cf5095ae015.
(rectangular and non-rectangular loops)
Submitting on behalf of Natalia Glagoleva <natgla@microsoft.com>
Differential Revision: https://reviews.llvm.org/D148393
