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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SIMD] OR reduction with !!result not recognized as v128.any_true"
href="https://bugs.llvm.org/show_bug.cgi?id=50796">50796</a>
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<th>Summary</th>
<td>[SIMD] OR reduction with !!result not recognized as v128.any_true
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: WebAssembly
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>clang@evan.coeusgroup.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>I even tried using an OpenMP SIMD pragma to help LLVM recognized the reduction,
no luck. Here is a quick test (CE: <a href="https://godbolt.org/z/fhMvKj6Mh">https://godbolt.org/z/fhMvKj6Mh</a>):
#include <wasm_simd128.h>
#pragma clang diagnostic ignored "-Wmissing-prototypes"
typedef int8_t i8x16 __attribute__((__vector_size__(16)));
typedef int16_t i16x8 __attribute__((__vector_size__(16)));
typedef int32_t i32x4 __attribute__((__vector_size__(16)));
typedef int64_t i64x2 __attribute__((__vector_size__(16)));
int
i8x16_any_true(i8x16 a) {
int8_t r = 0;
#pragma omp simd reduction(|:r)
for (int i = 0 ; i < 16 ; i++) {
r |= a[i];
}
return !!r;
}
int
i16x8_any_true(i16x8 a) {
int16_t r = 0;
#pragma omp simd reduction(|:r)
for (int i = 0 ; i < 8 ; i++) {
r |= a[i];
}
return !!r;
}
int
i32x4_any_true(i32x4 a) {
int32_t r = 0;
#pragma omp simd reduction(|:r)
for (int i = 0 ; i < 4 ; i++) {
r |= a[i];
}
return !!r;
}
int
i64x2_any_true(i64x2 a) {
int64_t r = 0;
#pragma omp simd reduction(|:r)
for (int i = 0 ; i < 2 ; i++) {
r |= a[i];
}
return !!r;
}
int
any_true_intrin(i8x16 a) {
return __builtin_wasm_any_true_v128(a);
}</pre>
</div>
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