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| author | Huan Nguyen <nhuhuan@yahoo.com> | 2022-06-10 15:48:13 -0700 |
|---|---|---|
| committer | Amir Ayupov <aaupov@fb.com> | 2022-06-10 15:49:32 -0700 |
| commit | 82095bd5ed504fe26553b337d15131db530e768b (patch) | |
| tree | d09fddd6798fc828d1c992594503df01da50e78d /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | e90b56e411867bca5d053b276a6319cfb3db62cb (diff) | |
| download | llvm-82095bd5ed504fe26553b337d15131db530e768b.zip llvm-82095bd5ed504fe26553b337d15131db530e768b.tar.gz llvm-82095bd5ed504fe26553b337d15131db530e768b.tar.bz2 | |
[BOLT] Mark fragments related to split jump table as non-simple
Mark fragments related to split jump table as non-simple.
A function could be splitted into hot and cold fragments. A split jump table is
challenging for correctly reconstructing control flow graphs, so it was marked
as ignored. This update marks those fragments as non-simple, allowing them
to be printed and partial control flow graph construction.
Test Plan:
```
llvm-lit -a tools/bolt/test/X86/split-func-icf.s
```
This test has two functions (main, main2), each has a jump table target to the
same cold portion main2.cold.1(*2). We try to print out only this cold portion.
If it is ignored, it cannot be printed. If it is non-simple, it can be printed. We
verify that it can be printed.
Reviewed By: Amir
Differential Revision: https://reviews.llvm.org/D127464
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
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