Revert "[SLP] Make getSameOpcode support interchangeable instructions. (#127450)"
This reverts commit 71a0cfd93263552ddc0bfd2ea7b0abe9a578f87e.
This commit triggers failed asserts when compiling ffmpeg. The
issue is reproducible with a small standalone reproducer like this:
void make_filters_from_proto(int *filter[][2], int bands) {
int c, q, n;
for (;; q++) {
n = 0;
for (; n < 7; n++) {
int theta = (q * (n - 6) + (n >> 1) - 3) % bands;
if (theta)
c = theta;
filter[q][n][0] = c;
}
}
}
$ clang -target x86_64-linux-gnu -c repro.c -O3
clang: ../lib/Transforms/Vectorize/SLPVectorizer.cpp:989: llvm::SmallVector<llvm
::Value*> {anonymous}::BinOpSameOpcodeHelper::InterchangeableInfo::getOperand(ll
vm::Instruction*) const: Assertion `FromCIValue.isZero() && "Cannot convert the
instruction."' failed.
The same issue also reproduces for a large number of other target
triples, aarch64-linux-gnu and others.
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