asbirlea added inline comments.
================
Comment at: llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp:312
switch (II->getIntrinsicID()) {
default: llvm_unreachable("doesn't pass 'hasAnalyzableMemoryWrite'
predicate");
case Intrinsic::lifetime_end:
----------------
The crash is hitting this unreachable for the intrinsic "llvm.memcpy.inline".
Simple repro: opt -dse test1.ll
```
define void @test(i8* noalias nocapture %0, i8* noalias nocapture readonly %1) {
tail call void @llvm.memcpy.inline(i8* align 1 %0, i8* align 1 %1, i64 3, i1
false)
ret void
}
declare void @llvm.memcpy.inline(i8* noalias nocapture writeonly, i8* noalias
nocapture readonly, i64 immarg, i1 immarg)
```
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D87163/new/
https://reviews.llvm.org/D87163
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