[all-commits] [llvm/llvm-project] e0092e: [RISCV][clang] Optimize memory usage of intrinsic ...

[Brandon Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e0092eae431956a2fd17f7ea88e7ba26d5e44f7e
      https://github.com/llvm/llvm-project/commit/e0092eae431956a2fd17f7ea88e7ba26d5e44f7e
  Author: Brandon Wu <brandon.wu at sifive.com>
  Date:   2024-01-26 (Fri, 26 Jan 2024)

  Changed paths:
    M clang/include/clang/Support/RISCVVIntrinsicUtils.h
    M clang/lib/Sema/SemaRISCVVectorLookup.cpp
    M clang/lib/Support/RISCVVIntrinsicUtils.cpp

  Log Message:
  -----------
  [RISCV][clang] Optimize memory usage of intrinsic lookup table (#77487)

This patch optimize:
  1. Reduce string size of RVVIntrinsicDef.
  2. Reduce the type size of the index of intrinsics.

I use valgrind --tool=massif to analyze a simple program:
```
#include <riscv_vector.h>
vint32m1_t test(vint32m1_t v1, vint32m1_t v2, size_t vl) {
  return __riscv_vadd(v1, v2, vl);
}
```
and before optimization, the peak memory usage is 15.68MB,
after optimization, the peak memory usage is 13.69MB.