2e87333bfe
This is an unusual canonicalization because we create an extra instruction, but it's likely better for analysis and codegen (similar reasoning as D133399). InstCombine::Negator may create this kind of multiply from negate and shift, but this should not conflict because of the narrow negation. I don't know how to create a fully general proof for this kind of transform in Alive2, but here's an example with bitwidths similar to one of the regression tests: https://alive2.llvm.org/ce/z/J3jTjR Differential Revision: https://reviews.llvm.org/D133667 |
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| .. | ||
| AggressiveInstCombine | ||
| CFGuard | ||
| Coroutines | ||
| Hello | ||
| IPO | ||
| InstCombine | ||
| Instrumentation | ||
| ObjCARC | ||
| Scalar | ||
| Utils | ||
| Vectorize | ||
| CMakeLists.txt | ||