================ @@ -484,10 +484,31 @@ MC/DC Instrumentation --------------------- When instrumenting for Modified Condition/Decision Coverage (MC/DC) using the -clang option ``-fcoverage-mcdc``, users are limited to at most **six** leaf-level -conditions in a boolean expression. A warning will be generated for boolean -expressions that contain more than six, and they will not be instrumented for -MC/DC. +clang option ``-fcoverage-mcdc``, there are two hard limits. + +The maximum number of terms is limited to 32767, which is practical for +handwritten expressions. To be more restrictive in order to enforce coding rules, +use ``-Xclang -fmcdc-max-conditions=n``. Expressions with exceeded condition +counts ``n`` will generate warnings. + +The number of test vectors (the maximum number of possible combinations of +expressions) is limited to 2,147,483,646. In this case, approximately +256MiB (==2GiB/8) is used to record test vectors. + +To reduce memory usage, you can limit the maximum number of test vectors per ---------------- ornata wrote:
Suggest consistently using "user" or "you" throughout docs. https://github.com/llvm/llvm-project/pull/82448 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
