diffsl 0.11.9

A compiler for a domain-specific language for ordinary differential equations (ODE).
Documentation 
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// RUN: %eopt --enzyme %s | FileCheck %s

module {
  func.func @square(%x : f64) -> f64{
    %y = arith.mulf %x, %x : f64
    return %y : f64
  }
  func.func @dsq(%x : f64, %dx : f64) -> f64 {
    %r = enzyme.fwddiff @square(%x, %dx) { activity=[#enzyme<activity enzyme_dup>], ret_activity=[#enzyme<activity enzyme_dupnoneed>] } : (f64, f64) -> (f64)
    return %r : f64
  }
}

// CHECK:   func.func @dsq(%[[arg0:.+]]: f64, %[[arg1:.+]]: f64) -> f64 {
// CHECK-NEXT:     %[[i0:.+]] = call @fwddiffesquare(%[[arg0]], %[[arg1]]) : (f64, f64) -> f64
// CHECK-NEXT:     return %[[i0]] : f64
// CHECK-NEXT:   }
// CHECK:   func.func private @fwddiffesquare(%[[arg0:.+]]: f64, %[[arg1:.+]]: f64) -> f64 {
// CHECK-NEXT:     %[[i0:.+]] = arith.mulf %[[arg1]], %[[arg0]] : f64
// CHECK-NEXT:     %[[i1:.+]] = arith.mulf %[[arg1]], %[[arg0]] : f64
// CHECK-NEXT:     %[[i2:.+]] = arith.addf %[[i0]], %[[i1]] : f64
// CHECK-NEXT:     %[[i3:.+]] = arith.mulf %[[arg0]], %[[arg0]] : f64
// CHECK-NEXT:     return %[[i2]] : f64
// CHECK-NEXT:   }