forked from OSchip/llvm-project
eb28da89a6
If a constrained intrinsic call was replaced by some value, it was not removed in some cases. The dangling instruction resulted in useless instructions executed in runtime. It happened because constrained intrinsics usually have side effect, it is used to model the interaction with floating-point environment. In some cases side effect is actually absent or can be ignored. This change adds specific treatment of constrained intrinsics so that their side effect can be removed if it actually absents. Differential Revision: https://reviews.llvm.org/D118426 |
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