[PATCH] D61879: WIP: Prototype of DSE optimizations for -ftrivial-auto-var-init

[Alexander Potapenko via Phabricator via cfe-commits]

glider added inline comments.


================
Comment at: llvm/lib/Transforms/Scalar/DeadStoreEliminationExp.cpp:709
+                   size_t argN) {
+  const Function *F = cast<Function>(Callee);
+  if (argN >= F->arg_size())
----------------
This cast fails in the following case:

```
%21 = call i64 @probe_kernel_read(i8* nonnull %9, i8* %20, i64 8) #10, !dbg !7740
```
, where the callee is declared as:
```
@probe_kernel_read = weak hidden alias i64 (i8*, i8*, i64), i64 (i8*, i8*, i64)* @__probe_kernel_read
```

When building Android kernel with LTO enabled, the gold plugin crashes on an assertion.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D61879/new/

https://reviews.llvm.org/D61879