[ShrinkWrap] Consider constant pool access as non-stack access (#164393)
As far as I understand, constant pool access does not access stack and
accesses read-only memory.
This patch considers constant pool access as non-stack access allowing
shrink wrapping to happen in the concerned test.
We should be seeing perf improvement with povray benchmark from
SPEC17(around 12% with -flto -Ofast) after this patch.
An NFC PR #162476 already exists to upload the test before the patch but
approval has got delayed. So, as @davemgreen suggested in that PR, I
have uploaded the test and patch in this single PR to show how test
looks like.
llvm-project
10d3c6bc - [ShrinkWrap] Consider constant pool access as non-stack access (#164393)
