This patch removes the assumption propagation that was added in D110655
primarily to get assumption informatino on opaque call sites for
optimizations. The analysis done in D111445 allows us to do this more
intelligently in the back-end.
Depends on D111445
Reviewed By: jdoerfert
Differential Revision: https://reviews.llvm.org/D111463
This patch adds OpenMP assumption attributes to call sites in applicable
regions. Currently this applies the caller's assumption attributes to
any calls contained within it. So, if a call occurs inside an OpenMP
assumes region to a function outside that region, we will assume that
call respects the assumptions. This is primarily useful for inline
assembly calls used heavily in the OpenMP GPU device runtime, which
allows us to then make judgements about what the ASM will do.
Reviewed By: jdoerfert
Differential Revision: https://reviews.llvm.org/D110655
Since these assumptions are coming from OpenMP it makes sense to mark
them as such in the generic IR encoding. Standardized assumptions will
be named
omp_ASSUMPTION_NAME
and extensions will be named
ompx_ASSUMPTION_NAME
which is the OpenMP 5.2 syntax for "extensions" of any kind.
This also matches what the OpenMP-Opt pass expects.
Summarized,
#pragma omp [...] assume[s] no_parallelism
now generates the same IR assumption annotation as
__attribute__((assume("omp_no_parallelism")))
Reviewed By: jhuber6
Differential Revision: https://reviews.llvm.org/D105937
The `assumes` directive is an OpenMP 5.1 feature that allows the user to
provide assumptions to the optimizer. Assumptions can refer to
directives (`absent` and `contains` clauses), expressions (`holds`
clause), or generic properties (`no_openmp_routines`, `ext_ABCD`, ...).
The `assumes` spelling is used for assumptions in the global scope while
`assume` is used for executable contexts with an associated structured
block.
This patch only implements the global spellings. While clauses with
arguments are "accepted" by the parser, they will simply be ignored for
now. The implementation lowers the assumptions directly to the
`AssumptionAttr`.
Reviewed By: ABataev
Differential Revision: https://reviews.llvm.org/D91980
The `assumes` directive is an OpenMP 5.1 feature that allows the user to
provide assumptions to the optimizer. Assumptions can refer to
directives (`absent` and `contains` clauses), expressions (`holds`
clause), or generic properties (`no_openmp_routines`, `ext_ABCD`, ...).
The `assumes` spelling is used for assumptions in the global scope while
`assume` is used for executable contexts with an associated structured
block.
This patch only implements the global spellings. While clauses with
arguments are "accepted" by the parser, they will simply be ignored for
now. The implementation lowers the assumptions directly to the
`AssumptionAttr`.
Reviewed By: ABataev
Differential Revision: https://reviews.llvm.org/D91980
Joseph Huber