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| author | David Green <david.green@arm.com> | 2023-08-23 18:17:37 +0100 |
|---|---|---|
| committer | David Green <david.green@arm.com> | 2023-08-23 18:17:37 +0100 |
| commit | adaf545a506bd3fd21a7293e27d5a4ae3a4aea31 (patch) | |
| tree | 7ba01161e941fe6886e1176601c039fe5a6d42a2 /flang/lib/Parser/preprocessor.cpp | |
| parent | f24aa691aa4f25291db8f7c61c6e9007288859e7 (diff) | |
| download | llvm-adaf545a506bd3fd21a7293e27d5a4ae3a4aea31.zip llvm-adaf545a506bd3fd21a7293e27d5a4ae3a4aea31.tar.gz llvm-adaf545a506bd3fd21a7293e27d5a4ae3a4aea31.tar.bz2 | |
[GlobalISel] Limit shift_of_shifted_logic_chain to non-zero folds
After D157690 we are seeing some crashes from Global ISel, which seem to be
related to the shift_of_shifted_logic_chain combine that can remove too many
instructions if the shift amount is zero.
This limits the fold to non-zero shifts, under the assumption that it is better
in that case to fold away the shift to a COPY.
Differential Revision: https://reviews.llvm.org/D158596
Diffstat (limited to 'flang/lib/Parser/preprocessor.cpp')
0 files changed, 0 insertions, 0 deletions