[llvm-bugs] [Bug 48679] New: How can I generate SVE vectors with LLVM

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48679

            Bug ID: 48679
           Summary: How can I generate SVE vectors with LLVM
           Product: clang
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C
          Assignee: unassignedclangbugs at nondot.org
          Reporter: yangzh.fnst at cn.fujitsu.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Hello,

LLVM always generate NEON vectors, but I want it generate SVE vectors. How can
I do this?

clang version 11.0.0

example.c:

#define ARRAYSIZE 1024
int a[ARRAYSIZE];
int b[ARRAYSIZE];
int c[ARRAYSIZE];
void subtract_arrays(int *restrict a, int *restrict b, int *restrict c)
{
    for (int i = 0; i < ARRAYSIZE; i++)
    {
        a[i] = b[i] - c[i];
    }
}

int main()
{
    subtract_arrays(a, b, c);
}
command:
clang --target=aarch64-linux-gnu -march=armv8-a+sve -O3 -S example.c


Thanks

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