llvm-project

Commit Graph

Author	SHA1	Message	Date
Adrian Prantl	75819aedf6	[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446	2016-04-15 15:57:41 +00:00
Adrian Prantl	b8089516a5	testcase gardening: update the emissionKind enum to the new syntax. (NFC) llvm-svn: 265081	2016-04-01 00:16:49 +00:00
Dehao Chen	23e2278e27	Reimplement discriminator assignment algorithm. Summary: The new algorithm is more efficient (O(n), n is number of basic blocks). And it is guaranteed to cover all cases of multiple BB mapped to same line. Reviewers: dblaikie, davidxl, dnovillo Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D14738 llvm-svn: 253594	2015-11-19 19:53:05 +00:00

Author

SHA1

Message

Date

Adrian Prantl

75819aedf6

[PR27284] Reverse the ownership between DICompileUnit and DISubprogram.

Currently each Function points to a DISubprogram and DISubprogram has a
scope field. For member functions the scope is a DICompositeType. DIScopes
point to the DICompileUnit to facilitate type uniquing.

Distinct DISubprograms (with isDefinition: true) are not part of the type
hierarchy and cannot be uniqued. This change removes the subprograms
list from DICompileUnit and instead adds a pointer to the owning compile
unit to distinct DISubprograms. This would make it easy for ThinLTO to
strip unneeded DISubprograms and their transitively referenced debug info.

Motivation
----------

Materializing DISubprograms is currently the most expensive operation when
doing a ThinLTO build of clang.

We want the DISubprogram to be stored in a separate Bitcode block (or the
same block as the function body) so we can avoid having to expensively
deserialize all DISubprograms together with the global metadata. If a
function has been inlined into another subprogram we need to store a
reference the block containing the inlined subprogram.

Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script
that updates LLVM IR testcases to the new format.

http://reviews.llvm.org/D19034
<rdar://problem/25256815>

llvm-svn: 266446

2016-04-15 15:57:41 +00:00

Adrian Prantl

b8089516a5

testcase gardening: update the emissionKind enum to the new syntax. (NFC)

llvm-svn: 265081

2016-04-01 00:16:49 +00:00

Dehao Chen

23e2278e27

Reimplement discriminator assignment algorithm.

Summary: The new algorithm is more efficient (O(n), n is number of basic blocks). And it is guaranteed to cover all cases of multiple BB mapped to same line.

Reviewers: dblaikie, davidxl, dnovillo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14738

llvm-svn: 253594

2015-11-19 19:53:05 +00:00

3 Commits