Module rustc_middle::mir::coverage
source · Expand description
Metadata from source code coverage analysis and instrumentation.
Structs
An ExpressionOperandId value is assigned directly from either a
CounterValueReference.as_u32() (which ascend from 1) or an ExpressionOperandId.as_u32()
(which descend from u32::MAX). Id value
0 (zero) represents a virtual counter with a
constant value of 0.InjectedExpressionId.as_u32() converts to ExpressionOperandId.as_u32()
InjectedExpressionIndex.as_u32() translates to u32::MAX - ExpressionOperandId.as_u32()
MappedExpressionIndex values ascend from zero, and are recalculated indexes based on their
array position in the LLVM coverage map “Expressions” array, which is assembled during the
“mapgen” process. They cannot be computed algorithmically, from the other
newtype_indexs.