forked from OSchip/llvm-project
a12f588ebb
This patch adds the ACLE intrinsics for all the MVE load and store
instructions not already handled by D69791. These ones don't need new
IR intrinsics, because they can be implemented in terms of standard
LLVM IR constructions.
Some of the load and store instructions access less than 128 bits of
memory, sign/zero extending each value to a wider vector lane on load
or truncating it on store. These are represented in IR by a load of a
shorter vector followed by a zext/sext, and conversely, a trunc
followed by a short store. Existing ISel patterns already recognize
those combinations and turn them into the right MVE instructions.
The predicated forms of all these instructions are represented in the
same way, except that the ordinary load/store operation is replaced
with the existing intrinsics @llvm.masked.{load,store}. These are
currently only code-generated as predicated MVE load/store
instructions if you give LLVM the `-enable-arm-maskedldst` option; so
I've done that in the LLVM codegen test. When we make that the
default, that option can be removed.
In the Tablegen backend, I've had to add a handful of extra support
features:
* We need to be able to make clang::Address objects out of a
pointer and an alignment (previously we only needed these when the
user passed us an existing one).
* We can now specify vector types that aren't 128 bits wide (for use
in those intermediate values in IR), the parametrized type system
can make one starting from two existing vector types (using the lane
count of one and the element type of the other).
* I've added support for code generation of pointer casts, and for
specifying LLVM types as operands to IRBuilder operations (for zext
and sext, though I think they'll come in useful again).
* Now not all IR construction operations need to be specified as
Builder.CreateFoo; some don't involve a Builder at all, and one
passes it as a parameter to a tiny static helper function in
CGBuiltin.cpp.
Reviewers: ostannard, MarkMurrayARM, dmgreen
Subscribers: kristof.beyls, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D70088
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| .. | ||
| CMakeLists.txt | ||
| ClangASTEmitters.h | ||
| ClangASTNodesEmitter.cpp | ||
| ClangAttrEmitter.cpp | ||
| ClangCommentCommandInfoEmitter.cpp | ||
| ClangCommentHTMLNamedCharacterReferenceEmitter.cpp | ||
| ClangCommentHTMLTagsEmitter.cpp | ||
| ClangDataCollectorsEmitter.cpp | ||
| ClangDiagnosticsEmitter.cpp | ||
| ClangOpcodesEmitter.cpp | ||
| ClangOpenCLBuiltinEmitter.cpp | ||
| ClangOptionDocEmitter.cpp | ||
| ClangSACheckersEmitter.cpp | ||
| ClangTypeNodesEmitter.cpp | ||
| MveEmitter.cpp | ||
| NeonEmitter.cpp | ||
| TableGen.cpp | ||
| TableGenBackends.h | ||