Summary:
An IR load can be invariant, dereferenceable, neither, or both. But
currently, MI's notion of invariance is IR-invariant &&
IR-dereferenceable.
This patch splits up the notions of invariance and dereferenceability at
the MI level. It's NFC, so adds some probably-unnecessary
"is-dereferenceable" checks, which we can remove later if desired.
Reviewers: chandlerc, tstellarAMD
Subscribers: jholewinski, arsenm, nemanjai, llvm-commits
Differential Revision: https://reviews.llvm.org/D23371
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281151 91177308-0d34-0410-b5e6-96231b3b80d8
This will be used during GlobalISel, where we need a more robust and readable
way to write tests than a simple immediate ID.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277209 91177308-0d34-0410-b5e6-96231b3b80d8
Change the syntax to use `%0.sub8` to denote a subregister.
This seems like a more natural fit to denote subregisters; I also plan
to introduce a new ":classname" syntax in upcoming patches to denote the
register class of a vreg.
Note that this commit disallows plain identifiers to start with a '.'
character. This shouldn't affect anything as external names/IR
references are all prefixed with '$'/'%', plain identifiers are only
used for instruction names, register mask names and subreg indexes.
Differential Revision: https://reviews.llvm.org/D22390
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276815 91177308-0d34-0410-b5e6-96231b3b80d8
In an instruction like:
CFI_INSTRUCTION .cfi_def_cfa ...
we can drop the '.cfi_' prefix since that should be obvious by the
context:
CFI_INSTRUCTION def_cfa ...
While being a terser and cleaner syntax this also prepares to dropping
support for identifiers starting with a dot character so we can use it
for expressions.
Differential Revision: http://reviews.llvm.org/D22388
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276785 91177308-0d34-0410-b5e6-96231b3b80d8
This should be all the low-level instruction selection needs to determine how
to implement an operation, with the remaining context taken from the opcode
(e.g. G_ADD vs G_FADD) or other flags not based on type (e.g. fast-math).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276158 91177308-0d34-0410-b5e6-96231b3b80d8
The global IR values in machine memory operands should use the global value
'@<name>' syntax instead of the current '%ir.<name>' syntax.
However, the global value call entry pseudo source values use the global value
syntax already. Therefore, the syntax for the call entry pseudo source values
has to be changed so that the global values and call entry global value PSVs
can be parsed without ambiguities.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245526 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the machine instruction's register operand ties.
The ties are printed out only when the instructon has register ties that are
different from the ties that are specified in the instruction's description.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245482 91177308-0d34-0410-b5e6-96231b3b80d8
The defined registers are already serialized - they are represented by placing
them before the '=' in a machine instruction. However, certain instructions like
INLINEASM can have defined register operands after the '=', so this commit
introduces the 'def' register flag for such operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245480 91177308-0d34-0410-b5e6-96231b3b80d8
Krzysztof Parzyszek
Justin Lebar
Tim Northover
Matthias Braun
Mehdi Amini
Quentin Colombet
Alex Lorenz