These are several fixes for the flang site. The look has been changed to
match clang since flang, like clang, is a frontend. Some broken links
were removed. Most fixes are to secton titles so the table of contents
is generated correctly. A minor typo has been fixed.
Fixes section depth and removes annotation of source as HLFIR since this
is not currently understood by the lexer. Fixing these issues help
reduce warnings in the documentation CI for LLVM.
When `AssignOp` is used with LHS that is a compiler generated temporary
special care must be taken to initialize the temporary and avoid
finalizations of its components. This change-set adds optional
`temporary_lhs` attribute for `AssignOp` to convey this information
to HLFIR-to-FIR conversion pass. Currently, this results in
calling `AssignTemporary` runtime for doing the assignment.
Reviewed By: jeanPerier, tblah
Differential Revision: https://reviews.llvm.org/D152482
This operation will be used to transform MATMUL(TRANSPOSE(a), b). The
transformation will go in the following stages:
1. Lowering to hlfir.transpose and hlfir.matmul
2. Canonicalise to hlfir.matmul_transpose
3. hlfir.matmul_transpose will be lowered to FIR as a new runtime
library call
Step 2 (and this operation) are included for consistency with the other
hlfir intrinsic operations and to avoid mixing concerns in the intrinsic
lowering pass.
In step 3, a new runtime library call is used because this operation is
most easily implemented in one go (the transposed indexing actually
makes the indexing simpler than for a normal matrix multiplication). In
the long run, it is intended that HLFIR will allow the same buffer
to be shared between different runtime calls without temporary
allocations, but in this specific case we can do even better than that
with a dedicated implementation.
This should speed up galgel from SPEC2000 (but this hadn't been tested
yet). The optimization was implemented in Classic Flang.
Reviewed By: vzakhari
Differential Revision: https://reviews.llvm.org/D145957
After more considerations and experience, switch to one of the
alternative plan for HLFIR variable that will avoid requiring naming
designators and having to maintain and update names in attributes after
inlining of code duplication.
The cost is the increase of fir.box usage, which in most cases should
be removed when lowering from HLFIR to FIR.
Differential Revision: https://reviews.llvm.org/D137634
This document describes a new HLFIR dialect with a new value type
(hlfir.expr) and some new higher level FIR operations to make lowering
to FIR more straightforward and make pattern matching of high level
Fortran concepts (array and character assignments, character operations,
and transformational intrinsics) easier in FIR.
This should allow implementing the remaining gaps in Fortran 95 features
without increasing the lowering code complexity too much, and get a
clean start for the remaining F2003 and F2018 features.
Differential Revision: https://reviews.llvm.org/D134285
