diffsl 0.9.2

A compiler for a domain-specific language for ordinary differential equations (ODE).
Documentation 
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// RUN: if [ %llvmver -ge 11 ]; then %clang++ -std=c++17 -O0 %s -S -emit-llvm -o - %loadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 11 ]; then %clang++ -std=c++17 -O1 %s -S -emit-llvm -o - %loadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 11 ]; then %clang++ -std=c++17 -O2 %s -S -emit-llvm -o - %loadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 11 ]; then %clang++ -std=c++17 -O3 %s -S -emit-llvm -o - %loadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 12 ]; then %clang++ -std=c++17 -O0 %s -S -emit-llvm -o - %newLoadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 12 ]; then %clang++ -std=c++17 -O1 %s -S -emit-llvm -o - %newLoadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 12 ]; then %clang++ -std=c++17 -O2 %s -S -emit-llvm -o - %newLoadClangEnzyme | %lli - ; fi
// RUN: if [ %llvmver -ge 12 ]; then %clang++ -std=c++17 -O3 %s -S -emit-llvm -o - %newLoadClangEnzyme | %lli - ; fi

#include "../test_utils.h"

#include <enzyme/enzyme>

struct pair {
  double x;
  double y;
};

double square(struct pair p) { return p.x * p.y; }

int main() {
  double res = enzyme::get<0>(enzyme::autodiff<enzyme::Forward>(
      square, enzyme::Duplicated{pair{2, 3}, pair{70, 110}}));
  APPROX_EQ(res, 2 * 110 + 3 * 70, 1e-10);
}