diff options
| author | Mircea Trofin <mtrofin@google.com> | 2018-12-21 22:48:50 +0000 |
|---|---|---|
| committer | Mircea Trofin <mtrofin@google.com> | 2018-12-21 22:48:50 +0000 |
| commit | b53eeb6f4c824fcdfcb93dd9325a603c005660a7 (patch) | |
| tree | 584b0989c4d54efc27f9a41e0c3430741f39fd7d /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | 8d20cfdfc6c26533a87c525cb6e8dbc50a65e036 (diff) | |
| download | llvm-b53eeb6f4c824fcdfcb93dd9325a603c005660a7.zip llvm-b53eeb6f4c824fcdfcb93dd9325a603c005660a7.tar.gz llvm-b53eeb6f4c824fcdfcb93dd9325a603c005660a7.tar.bz2 | |
[llvm] API for encoding/decoding DWARF discriminators.
Summary:
Added a pair of APIs for encoding/decoding the 3 components of a DWARF discriminator described in http://lists.llvm.org/pipermail/llvm-dev/2016-October/106532.html: the base discriminator, the duplication factor (useful in profile-guided optimization) and the copy index (used to identify copies of code in cases like loop unrolling)
The encoding packs 3 unsigned values in 32 bits. This CL addresses 2 issues:
- communicates overflow back to the user
- supports encoding all 3 components together. Current APIs assume a sequencing of events. For example, creating a new discriminator based on an existing one by changing the base discriminator was not supported.
Reviewers: davidxl, danielcdh, wmi, dblaikie
Reviewed By: dblaikie
Subscribers: zzheng, dmgreen, aprantl, JDevlieghere, llvm-commits
Differential Revision: https://reviews.llvm.org/D55681
llvm-svn: 349973
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
0 files changed, 0 insertions, 0 deletions