8351233: [ASAN] avx2-emu-funcs.hpp:151:20: error: ‘D.82188’ is used uninitialized

[sendaoYan]

Hi all,

The return type of function const __m256i &perm is __m256i, so const __m256i &perm should be replaced as 'const __m256i perm'.

The function implementation in gcc/clang compiler header:

1. gcc: lib/gcc/x86_64-pc-linux-gnu/14.2.0/include/avxintrin.h

extern __inline __m256i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm256_loadu_si256 (__m256i_u const *__P)
{
  return *__P;
}

2. clang: lib64/clang/17/include/avxintrin.h

static __inline __m256i __DEFAULT_FN_ATTRS
_mm256_loadu_si256(__m256i_u const *__p)
{
  struct __loadu_si256 {
    __m256i_u __v;
  } __attribute__((__packed__, __may_alias__));
  return ((const struct __loadu_si256*)__p)->__v;
}

Additional testing:

• jtreg tests(include tier1/2/3 etc.) on linux-x64(AMD EPYC 9T24 96-Core Processor) with release build
• jtreg tests(include tier1/2/3 etc.) on linux-x64(AMD EPYC 9T24 96-Core Processor) with fastdebug build

---

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Issue

• JDK-8351233: [ASAN] avx2-emu-funcs.hpp:151:20: error: ‘D.82188’ is used uninitialized (Bug - P3)

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[sendaoYan]

@vamsi-parasa Could you take look this PR

[sendaoYan]

/label add core-libs

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