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ARM64: Fix LDP/STP fusion (again). Reported and analyzed by Zhongwei Yao. Fix by Peter Cawley. (cherry picked from commit b8c6ccd50) Assume we have stores/loads from the pointer with offset +488 and -16. The lower bits of the offset are the same as for the offset (488 + 8). This leads to the incorrect fusion of these instructions: | str x20, [x21, 488] | stur x20, [x21, -16] to the following instruction: | stp x20, x20, [x21, 488] This patch prevents this fusion by more accurate offset comparison. Sergey Kaplun: * added the description and the test for the problem Part of tarantool/tarantool#11691
5709 of 6046 branches covered (94.43%)
Branch coverage included in aggregate %.
21787 of 23512 relevant lines covered (92.66%)
3873319.92 hits per line
| Lines | Coverage | ∆ | File |
|---|---|---|---|
| 1 |
78.52 |
-0.08% | src/lj_opt_fold.c |
| 2 |
91.11 |
-0.32% | src/lj_alloc.c |
| 2 |
92.0 |
-0.44% | src/luajit.c |
| 6 |
94.74 |
-4.31% | src/lj_str.c |
| 10 |
77.8 |
-1.01% | src/lj_api.c |
| ID | Job ID | Ran | Files | Coverage | |
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| 1 | 17641033457.1 | 89 |
93.02 |
GitHub Action Run |
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