We end up dereferencing the end iterator here when the Aspect doesn't exist in the DefaultAction map.
Change the API to return Optional<LLT> and return None when not found.
Also update the callers to handle the None case
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302963 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Legalize only if the type is marked as Legal or Custom. If not, return Unsupported as LegalizerHelper is not able to handle non-power-of-2 types right now.
Reviewers: qcolombet, aditya_nandakumar, dsanders, t.p.northover, kristof.beyls, javed.absar, ab
Reviewed By: kristof.beyls, ab
Subscribers: dberris, rovka, igorb, llvm-commits
Differential Revision: https://reviews.llvm.org/D31711
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299929 91177308-0d34-0410-b5e6-96231b3b80d8
These are simplified variants of the current G_SEQUENCE and G_EXTRACT, which
assume the individual parts will be contiguous, homogeneous, and occupy the
entirity of the larger register. This makes reasoning about them much easer
since you only have to look at the first register being merged and the result
to know what the instruction is doing.
I intend to gradually replace all uses of the more complicated sequence/extract
with these (or single-element insert/extracts), and then remove the older
variants. For now we start with legalization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296921 91177308-0d34-0410-b5e6-96231b3b80d8
Uses a Custom implementation because the slot sizes being a multiple of the
pointer size isn't really universal, even for the architectures that do have a
simple "void *" va_list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295255 91177308-0d34-0410-b5e6-96231b3b80d8
We don't handle all cases yet (see arm64-fallback.ll for an example), but this
is enough to cover most common C++ code so it's a good place to start.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294247 91177308-0d34-0410-b5e6-96231b3b80d8
It'll almost immediately fail because it always tries to half/double the size
until it finds a legal one. Unfortunately, this triggers an assertion
preventing the DAG fallback from being possible.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288834 91177308-0d34-0410-b5e6-96231b3b80d8
The previous names were both misleading (the MachineLegalizer actually
contained the info tables) and inconsistent with the selector & translator (in
having a "Machine") prefix. This should make everything sensible again.
The only functional change is the name of a couple of command-line options.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284287 91177308-0d34-0410-b5e6-96231b3b80d8
