https://bugs.llvm.org/show_bug.cgi?id=48045
Bug ID: 48045
Summary: Missed loop vectorization with conditional store
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
#define N 1024
float a[N], b[N], d[N];
void
foo (float *__restrict p, float *__restrict q)
{
int i;
for (i = 0; i < N; i++)
d[i] = a[i] < b[i] ? p[i] : q[i];
}
Clang does not vectorize it due to AVX 2 cost model.
ICC and GCC vectorizes it with AVX2. GCC even with AVX.
https://godbolt.org/z/WjKdjf
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