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| author | Jeremy Morse <jeremy.morse.llvm@gmail.com> | 2018-12-10 12:04:08 +0000 |
|---|---|---|
| committer | Jeremy Morse <jeremy.morse.llvm@gmail.com> | 2018-12-10 12:04:08 +0000 |
| commit | a06b163d5cee8114cd34c4565bbf1d5f28554684 (patch) | |
| tree | 59b3d72d3e717c13fabdfd6bb2af4dece522ff5a /clang/lib/Lex/Preprocessor.cpp | |
| parent | 1bf1a156d673d5d48ef2ca41cba642c5ed11d683 (diff) | |
| download | bcm5719-llvm-a06b163d5cee8114cd34c4565bbf1d5f28554684.tar.gz bcm5719-llvm-a06b163d5cee8114cd34c4565bbf1d5f28554684.zip | |
[DebugInfo] Don't drop dbg.value's of nullptr
Currently, dbg.value's of "nullptr" are dropped when entering a SelectionDAG --
apparently just because of an oversight when recognising Values that are
constant (see PR39787). This patch adds ConstantPointerNull to the list of
constants that can be turned into DBG_VALUEs.
The matter of what bit-value a null pointer constant in LLVM has was raised
in this mailing list thread:
http://lists.llvm.org/pipermail/llvm-dev/2018-December/128234.html
Where it transpires LLVM relies on (IR) null pointers being zero valued,
thus I've baked this assumption into the patch.
Differential Revision: https://reviews.llvm.org/D55227
llvm-svn: 348753
Diffstat (limited to 'clang/lib/Lex/Preprocessor.cpp')
0 files changed, 0 insertions, 0 deletions
