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_Noreturn-qualified functions now do not generate any ret/iret instruction

This commit is contained in:
Xavier ASUS 2019-10-30 00:23:41 +01:00
parent 7c4ae5853b
commit 1dcefbf527
1 changed files with 31 additions and 21 deletions
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52
src/stm8/gen.c
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@ -3464,39 +3464,49 @@ genEndFunction (iCode *ic)
return;
}
/* adjust the stack for the function */
if (sym->stack)
adjustStack (sym->stack, retsize != 1, retsize != 2 && retsize != 4, retsize != 4);
wassertl (!G.stack.pushed, "Unbalanced stack.");
if (IFFUNC_ISCRITICAL (sym->type))
genEndCritical (NULL);
if (IFFUNC_ISISR (sym->type))
if (IFFUNC_ISNORETURN (OP_SYMBOL (IC_LEFT (ic))->type))
{
D (emit2 (";", "C11 noreturn function."));
/* if debug then send end of function */
if (options.debug && currFunc && !regalloc_dry_run)
debugFile->writeEndFunction (currFunc, ic, 1);
emit2 ("iret", "");
cost (1, 11);
}
else
{
/* if debug then send end of function */
if (options.debug && currFunc && !regalloc_dry_run)
debugFile->writeEndFunction (currFunc, ic, 1);
/* adjust the stack for the function */
if (sym->stack)
adjustStack (sym->stack, retsize != 1, retsize != 2 && retsize != 4, retsize != 4);
if (options.model == MODEL_LARGE)
wassertl (!G.stack.pushed, "Unbalanced stack.");
if (IFFUNC_ISCRITICAL (sym->type))
genEndCritical (NULL);
if (IFFUNC_ISISR (sym->type))
{
emit2 ("retf", "");
cost (1, 5);
/* if debug then send end of function */
if (options.debug && currFunc && !regalloc_dry_run)
debugFile->writeEndFunction (currFunc, ic, 1);
emit2 ("iret", "");
cost (1, 11);
}
else
{
emit2 ("ret", "");
cost (1, 4);
/* if debug then send end of function */
if (options.debug && currFunc && !regalloc_dry_run)
debugFile->writeEndFunction (currFunc, ic, 1);
if (options.model == MODEL_LARGE)
{
emit2 ("retf", "");
cost (1, 5);
}
else
{
emit2 ("ret", "");
cost (1, 4);
}
}
}
}