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Don't directly expose coverage::CounterMappingRegion via FFI

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The definition of this struct changes in LLVM 12 due to the addition
of branch coverage support. To avoid future mismatches, declare our
own struct and then convert between them.
This commit is contained in:
Nikita Popov
2021-02-20 16:43:05 +01:00
parent b763d9a40c
commit 1d280b012d
3 changed files with 26 additions and 8 deletions
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24
compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
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@@ -8,6 +8,17 @@
using namespace llvm;
struct LLVMRustCounterMappingRegion {
coverage::Counter Count;
uint32_t FileID;
uint32_t ExpandedFileID;
uint32_t LineStart;
uint32_t ColumnStart;
uint32_t LineEnd;
uint32_t ColumnEnd;
coverage::CounterMappingRegion::RegionKind Kind;
};
extern "C" void LLVMRustCoverageWriteFilenamesSectionToBuffer(
const char* const Filenames[],
size_t FilenamesLen,
@@ -27,13 +38,22 @@ extern "C" void LLVMRustCoverageWriteMappingToBuffer(
unsigned NumVirtualFileMappingIDs,
const coverage::CounterExpression *Expressions,
unsigned NumExpressions,
coverage::CounterMappingRegion *MappingRegions,
LLVMRustCounterMappingRegion *RustMappingRegions,
unsigned NumMappingRegions,
RustStringRef BufferOut) {
// Convert from FFI representation to LLVM representation.
SmallVector<coverage::CounterMappingRegion, 0> MappingRegions;
MappingRegions.reserve(NumMappingRegions);
for (const auto &Region : makeArrayRef(RustMappingRegions, NumMappingRegions)) {
MappingRegions.emplace_back(
Region.Count, Region.FileID, Region.ExpandedFileID,
Region.LineStart, Region.ColumnStart, Region.LineEnd, Region.ColumnEnd,
Region.Kind);
}
auto CoverageMappingWriter = coverage::CoverageMappingWriter(
makeArrayRef(VirtualFileMappingIDs, NumVirtualFileMappingIDs),
makeArrayRef(Expressions, NumExpressions),
makeMutableArrayRef(MappingRegions, NumMappingRegions));
MappingRegions);
RawRustStringOstream OS(BufferOut);
CoverageMappingWriter.write(OS);
}