https://bugs.llvm.org/show_bug.cgi?id=48584
Bug ID: 48584
Summary: Reduction identifier "+" type requirements
Product: OpenMP
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Clang Compiler Support
Assignee: unassignedclangbugs at nondot.org
Reporter: dalg24 at gmail.com
CC: a.bataev at hotmail.com, jdoerfert at anl.gov,
llvm-bugs at lists.llvm.org
The following code
```
#include <cstdio>
struct Point {
int x;
int y;
Point& operator+=(Point const &other) { x += other.x; y += other.y; return
*this; }
};
void find_enclosing_rectangle ( int n, Point const* points )
{
Point sump = {0, 0};
#pragma omp parallel for reduction(+: sump)
for ( int i = 0; i < n; i++ ) {
sump += points[i];
}
printf("sum = (%d, %d)\n", sump.x, sump.y);
}
```
yields `error: invalid operands to binary expression ('Point' and 'Point')`.
Reduction with “+” seems to require the binary plus operator but the OpemMP
specification
https://www.openmp.org/spec-html/5.1/openmpsu117.html#x152-1720002.21.5 (table
2.11) only mentions operator+=
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