Optimizer FAILED with no explanation

[WWP00]

Ran:

$ time ~/software/intelFPGA_pro/19.2/hld/bin/aoc -v -fpc -fp-relaxed kernel2.cl -o kernel2.aocx -board=s10gx

aoc: Environment checks are completed successfully.

aoc: Cached files in /var/tmp/aocl/daniel may be used to reduce compilation time

You are now compiling the full flow!!

aoc: Selected target board s10gx

aoc: Running OpenCL parser....

aoc: OpenCL parser completed successfully.

aoc: Linking Object files....

aoc: Optimizing and doing static analysis of code...

Error: Optimizer FAILED.

Refer to kernel2/kernel2.log for details.

Contents of kernel2/kernel2.log are:

Compiler Command: aoc -v -fpc -fp-relaxed kernel2.cl -o kernel2.aocx -board=s10gx

[WWP00]

We tried adding the -high-effort flag but got the same results

[HRZ]

How long does it take from when you run the command until you receive the error? If it takes more than an hour, then your kernel is likely too complex for the compiler to process. The "-high-effort" is for placement and routing and will not affect your case; your kernel compilation is failing in the OpenCL to HDL conversion step, not placement and routing.

[WWP00]

About 90 minutes

[HRZ]

Then try reducing your design complexity. You can also test 19.3 to see if the same problem will still occur.

[MEIYAN_L_Intel]

Hi,

You can try to update to Quartus Prime Pro 19.3.

If the problem still persist please tell me as well.

Thanks

[PVeli]

I am using the Quartus 19.3.

I am getting the same error. The code works for emulation.

However while compilation Optimizer failed.

Probably I have to reduce the complexity of code.