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8328302c3f
This allows us to transform the below loop into a memcpy.
void test(unsigned *__restrict__ a, unsigned *__restrict__ b) {
for (int i = 2047; i >= 0; --i) {
a[i] = b[i];
}
}
This is the memcpy version of r251518, which added support for memset with
negative strided loops.
llvm-svn: 253091