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Try to make stack coloring work better with unwinding #69
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arielb1
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The old check for slot overlap treated 2 slots `S` and `T` as overlapping if there existed a CFG node in which both of the slots could possibly be active. That is overly conservative and caused stack blowups in Rust programs. Instead, check whether there is a single CFG node in which both of the slots are possibly active *together*.
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Yeah |
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[ do NOT merge until someone LLVM confirms that I didn't break anything important ]
see https://bugs.llvm.org/show_bug.cgi?id=32488