new hlt block terminator
It is handy to express when the end of a block cannot be reached. If a hlt terminator is executed, it traps the program. We don't go the llvm way and specify execution semantics as undefined behavior.
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9 changed files with 30 additions and 13 deletions
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@ -494,6 +494,9 @@ rv64_emitfn(Fn *fn, FILE *f)
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emitins(i, fn, f);
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lbl = 1;
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switch (b->jmp.type) {
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case Jhlt:
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fprintf(f, "\tebreak\n");
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break;
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case Jret0:
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if (fn->dynalloc) {
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if (frame - 16 <= 2048)
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