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[DebugInfo] Upgrade DISubrange to support Fortran dynamic arrays

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This patch upgrades DISubrange to support fortran requirements.

Summary:
Below are the updates/addition of fields.
lowerBound - Now accepts signed integer or DIVariable or DIExpression,
earlier it accepted only signed integer.
upperBound - This field is now added and accepts signed interger or
DIVariable or DIExpression.
stride - This field is now added and accepts signed interger or
DIVariable or DIExpression.
This is required to describe bounds of array which are known at runtime.

Testing:
unit test cases added (hand-written)
check clang
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D80197
This commit is contained in:
Alok Kumar Sharma
2020-05-28 13:31:22 +05:30
committed by Sourabh Singh Tomar
parent 213c6cdf2e
commit d20bf5a725
34 changed files with 813 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -1527,10 +1527,12 @@ static uint64_t rotateSign(int64_t I) {
void ModuleBitcodeWriter::writeDISubrange(const DISubrange *N,
SmallVectorImpl<uint64_t> &Record,
unsigned Abbrev) {
const uint64_t Version = 1 << 1;
const uint64_t Version = 2 << 1;
Record.push_back((uint64_t)N->isDistinct() | Version);
Record.push_back(VE.getMetadataOrNullID(N->getRawCountNode()));
Record.push_back(rotateSign(N->getLowerBound()));
Record.push_back(VE.getMetadataOrNullID(N->getRawLowerBound()));
Record.push_back(VE.getMetadataOrNullID(N->getRawUpperBound()));
Record.push_back(VE.getMetadataOrNullID(N->getRawStride()));
Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
Record.clear();