| commit | c8eb535aed0368c20b25fe05bca563ab38dd91e9 | [log] [tgz] |
|---|---|---|
| author | eopXD <yueh.ting.chen@gmail.com> | Thu Mar 23 01:51:39 2023 -0700 |
| committer | eopXD <yueh.ting.chen@gmail.com> | Fri May 19 09:39:36 2023 -0700 |
| tree | 8a2b1d6e9853b9498c3cfb58cb47afa9d251fec8 | |
| parent | dae175423a07fbc63cf9d996751609361493f925 [diff] |
[1/11][IR] Permit load/store/alloca for struct of the same scalable vector type This patch-set aims to simplify the existing RVV segment load/store intrinsics to use a type that represents a tuple of vectors instead. To achieve this, first we need to relax the current limitation for an aggregate type to be a target of load/store/alloca when the aggregate type contains homogeneous scalable vector types. Then to adjust the prolog of an LLVM function during lowering to clang. Finally we re-define the RVV segment load/store intrinsics to use the tuple types. The pull request under the RVV intrinsic specification is riscv-non-isa/rvv-intrinsic-doc#198 --- This is the 1st patch of the patch-set. This patch is originated from D98169. This patch allows aggregate type (StructType) that contains homogeneous scalable vector types to be a target of load/store/alloca. The RFC of this patch was posted in LLVM Discourse. https://discourse.llvm.org/t/rfc-ir-permit-load-store-alloca-for-struct-of-the-same-scalable-vector-type/69527 The main changes in this patch are: Extend `StructLayout::StructSize` from `uint64_t` to `TypeSize` to accommodate an expression of scalable size. Allow `StructType:isSized` to also return true for homogeneous scalable vector types. Let `Type::isScalableTy` return true when `Type` is `StructType` and contains scalable vectors Extra description is added in the LLVM Language Reference Manual on the relaxation of this patch. Authored-by: Hsiangkai Wang <kai.wang@sifive.com> Co-Authored-by: eop Chen <eop.chen@sifive.com> Reviewed By: craig.topper, nikic Differential Revision: https://reviews.llvm.org/D146872
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