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// RUN: if [ %llvmver -le 11 ]; then %clang -std=c11 -ffast-math -O0 %s -S -emit-llvm -o - | %opt - %OPloadEnzyme %enzyme -S | %lli - ; fi
// RUN: if [ %llvmver -le 9 ]; then %clang -std=c11 -ffast-math -O1 %s -S -emit-llvm -o - | %opt - %OPloadEnzyme %enzyme -S | %lli - ; fi
// RUN: if [ %llvmver -le 11 ]; then %clang -std=c11 -ffast-math -O0 %s -S -emit-llvm -o - | %opt - %OPloadEnzyme %enzyme -enzyme-inline=1 -S | %lli - ; fi
// RUN: if [ %llvmver -le 9 ]; then %clang -std=c11 -ffast-math -O1 %s -S -emit-llvm -o - | %opt - %OPloadEnzyme %enzyme -enzyme-inline=1 -S | %lli - ; fi
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include "../test_utils.h"
extern void __enzyme_autodiff(void*, double*, double*, int);
/*double max(double x, double y) {
return (x > y) ? x : y;
}*/
double reduce_max(double* vec, int size) {
double ret = -INFINITY;
for (int i = 0; i < size; i++) {
ret = (ret > vec[i]) ? ret : vec[i];
if (i >= 6) assert(0 && "bad");
}
return ret;
}
int main() {
double vec[] = {-1., 2., -0.2, 2., 1.};
double d_vec[] = {0., 0., 0., 0., 0.};
double max_val = reduce_max(vec, 5);
printf("reduce_max=%f\n", max_val);
__enzyme_autodiff(reduce_max, vec, d_vec, 5);
for(int i=0; i<5; i++) {
printf("d_reduce_max(%i)=%f\n", i, d_vec[i]);
}
double ans[] = {0, 0, 0, 1, 0};
for(int i=0; i<5; i++) {
printf("i=%d d_vec=%f ans=%f\n", i, d_vec[i], ans[i]);
APPROX_EQ(d_vec[i], ans[i], 1e-7);
}
printf("done\n");
}