Go 1.24 support for custom labels #40
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gnurizen
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umanwizard
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| switch (label_count) { | ||
| case 10: process_slice_pair(record, &labels_slice, 9); | ||
| case 9: process_slice_pair(record, &labels_slice, 8); | ||
| case 8: process_slice_pair(record, &labels_slice, 7); | ||
| case 7: process_slice_pair(record, &labels_slice, 6); | ||
| case 6: process_slice_pair(record, &labels_slice, 5); | ||
| case 5: process_slice_pair(record, &labels_slice, 4); | ||
| case 4: process_slice_pair(record, &labels_slice, 3); | ||
| case 3: process_slice_pair(record, &labels_slice, 2); | ||
| case 2: process_slice_pair(record, &labels_slice, 1); | ||
| case 1: process_slice_pair(record, &labels_slice, 0); | ||
| } |
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Why can't we use a for loop, does clang/llvm fail to unroll it?
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Auto unrolling chewed up more instructions and I was able to get a couple more labels with this approach. Also auto unrolling requires a static limit where this approach works with a dynamic upper bound.
umanwizard
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gnurizen
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Put go label collection in a separate unwinder routine and tail call it. Native unwinder and other custom labels code stays in unwind_stop. Hand unroll loops and great simplify the hash function. Reduce number of custom labels from 16 to 14. Remove opaquify.h, fix verifier errors by moving code around. Add a simple integration test for custom labels that runs against all kernels. Refactor test code to put shared code in a helper package.
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