Fix GH-22115: Tracing JIT drops loop-PHI CV register from SNAPSHOT#22132
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wilaak wants to merge 1 commit into
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Fix GH-22115: Tracing JIT drops loop-PHI CV register from SNAPSHOT#22132wilaak wants to merge 1 commit into
wilaak wants to merge 1 commit into
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Fixes GH-22115.
Extends the existing loop-PHI pre-pass to clear ZREG_LAST_USE on every SSA version of any loop-carried CV, not just phi->sources[1]. Intermediate versions from opcodes with op1_def under RC inference (SEND_VAR, QM_ASSIGN, CAST, etc.) were keeping the flag and tripping cleanup_stack mid-loop.
Hmm why so many no-op macros lurking here? Looks like leftovers from the new 8.4 IR stuff that was added. Not touching that.
Is a quick fix, NOT AN EXPERT. Needs expertise