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Hi, I ran into this issue recently and wanted to know if it was a bug or expected behavior. In the R600 backend's TargetTransformInfo implementation, we were setting UnrollingPreferences::Count = UINT_MAX. This was a mistake as we should have been setting UnrollingPreferences::MaxCount instead. However, as a result of setting Count to UINT_MAX, this loop would be unrolled 15 times: if (b

Hi Hal, I did opt.exe -S -debug -loop-unroll -unroll-runtime=true -unroll-count=4 csShader.ll and it prints out: Args: opt.exe -S -debug -loop-unroll -unroll-runtime=true -unroll-count=4 csShader.ll Loop Unroll: F[build_cs_5_0] Loop %loop_entry Loop Size = 82 partially unrolling with count: 1 Thanks, Frances On Thu, Oct 15, 2015 at 9:35 PM, Hal Finkel <hfinkel at anl.gov>