https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93931
Bug ID: 93931
Summary: ICE using lambda capture in openMP parallel for
reduction
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Peter.Georg at physik dot uni-regensburg.de
Target Milestone: ---
Created attachment 47909
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47909&action=edit
Source
The following (and attached) code fails to compile with any GCC >= 8 when
openMP is enabled. GCC compiles the code, but the result is wrong. Any tested
clang version compiles the code with no errors and the result is right.
#include <iostream>
int main()
{
int score = 0;
[&score]()
{
#pragma omp parallel for reduction(+ : score)
for(int i= 0; i < 1000; ++i)
{
score += i;
}
}();
std::cout << score << std::endl;
return score;
}
Error:
during RTL pass: expand
omp.cpp: In lambda function:
omp.cpp:6:9: internal compiler error: in make_decl_rtl, at varasm.c:1340
6 | #pragma omp parallel for reduction(+ : score)
|
