Revert "[SLP]Do not require external uses for roots and single use for other instructions in computeMinimumValueSizes. (#72679)"
This reverts commit 408dce82016463dcb5026b2ddfc62174970a88e9.
This triggered failed asserts with code like this:
char a[];
short *b;
int c, d, e, f;
void g() {
char *h;
for (;;) {
for (; f; ++f) {
h[f] = b[0] * a[e] + b[c] * a[1] >> 7;
++b;
}
h += d;
}
}
Compiled like this:
$ clang -target x86_64-linux-gnu -c repro.c -O2
clang: ../lib/IR/Instructions.cpp:3335: static llvm::CastInst* llvm::CastInst::Create(llvm::Instruction::CastOps, llvm::Value*, llvm::Type*, const llvm::Twine&, llvm::Instruction*): Assertion `castIsValid(op, S, Ty) && "Invalid cast!"' failed.
1de3f46938