compiler: fix conditional reductions

[mloubout]

Yet again.....

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.99%. Comparing base (7783a27) to head (cb1a5c6).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2671      +/-   ##
==========================================
+ Coverage   91.30%   91.99%   +0.69%     
==========================================
  Files         245      245              
  Lines       48856    48880      +24     
  Branches     4312     4314       +2     
==========================================
+ Hits        44608    44969     +361     
+ Misses       3536     3216     -320     
+ Partials      712      695      -17     

Flag	Coverage Δ
pytest-gpu-aomp-amdgpuX	72.52% <100.00%> (+<0.01%)	⬆️
pytest-gpu-nvc-nvidiaX	73.60% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.