| Issue |
133262
|
| Summary |
[LLVM] Suboptimal code for rounding shift right by constant
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
johnplatts
|
LLVM generates extra code for `((x & round_incr) + ((x ^ round_incr) >> 1)) >> 4` than for `(int32_t)(((int64_t)x + (int64_t)round_incr) >> 5)` where `x` is an int32_t value and `round_incr` is equivalent to `15 + (int32_t)((x & 32) != 0)` according to a snippet over at https://alive2.llvm.org/ce/z/Ar8vv9.
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