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LATX, fix: Abort on itemp register exhaustion #480

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Merged
LaurenIsACoder merged 1 commit into from
Sep 12, 2026
Merged

LATX, fix: Abort on itemp register exhaustion #480

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11 changes: 11 additions & 0 deletions target/i386/latx/translator/reg-alloc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -298,6 +298,17 @@ IR2_OPND ra_alloc_itemp(void)
int itemp_reg_num;

itemp_reg_num = ra_alloc_itemp_num();
if (unlikely(itemp_reg_num < 0)) {
/*
* Do not let a failed allocation propagate as register number -1
* into the immediate cache lookup or IR2 operand construction. It
* would otherwise cause undefined behavior or corrupt generated code.
*/
fprintf(stderr,
"[LATX] itemp register exhausted, status=0x%x\n",
lsenv->tr_data->itemp_status);
abort();
}
#ifdef CONFIG_LATX_IMM_REG
if (option_imm_reg) {
int itemp_num = reg_itemp_reverse_map[itemp_reg_num];
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