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Little optimization to not produce an unreachable goto instruction

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Wolfgang (Blub) Bumiller 2012-11-21 17:40:35 +01:00
parent b1425dfcf1
commit 5a6b2bceb2
1 changed files with 9 additions and 0 deletions
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9
ir.c
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@ -2522,6 +2522,15 @@ tailcall:
/* fixup the jump address */
code_statements[stidx].o2.s1 = (onfalse->code_start) - (stidx);
stmt.opcode = vec_last(code_statements).opcode;
if (stmt.opcode == INSTR_GOTO ||
stmt.opcode == INSTR_IF ||
stmt.opcode == INSTR_IFNOT ||
stmt.opcode == INSTR_RETURN ||
stmt.opcode == INSTR_DONE)
{
/* no use jumping from here */
return true;
}
/* may have been generated in the previous recursive call */
stmt.opcode = INSTR_GOTO;
stmt.o1.s1 = (onfalse->code_start) - vec_size(code_statements);