jdenny-ornl wrote:
For some codes, I get the following error for a gfx906:
```
LLVM ERROR: Relocation for CG Profile could not be created: unknown relocation
name
```
I see it for OpenMC, but the following is a simpler example:
```
$ cat test.c
#include <stdio.h>
#include <stdlib.h>
__attribute__((noinline))
double test(double x, int n) {
double res = 1;
for (int i = 0; i < n; ++i)
res *= x;
return res;
}
int main(int argc, char *argv[]) {
double x = atof(argv[1]);
unsigned n = atoi(argv[2]);
#pragma omp target map(tofrom:x)
x = test(x, n);
printf("%f\n", x);
return 0;
}
$ clang -O2 -g -fopenmp --offload-arch=native test.c -o test \
-fprofile-generate -fprofile-generate-gpu
$ LLVM_PROFILE_FILE=test.profraw ./test 2 4
16.000000
$ llvm-profdata merge -output=test.profdata *.profraw
$ clang -O2 -g -fopenmp --offload-arch=native test.c -foffload-lto \
-fprofile-use-gpu=test.profdata
```
I can prevent the error by lowering the last -O2 to -O1 or by removing
the `__attribute__((noinline))`. Am I doing something wrong?
https://github.com/llvm/llvm-project/pull/94268
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