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Fixed incorrect use_list update

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This commit is contained in:
Dmitry Stogov 2023-12-21 13:15:07 +03:00
parent ac4ea33c24
commit 415f673be5
1 changed files with 30 additions and 1 deletions
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31
ir_sccp.c
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@ -176,6 +176,35 @@ static void ir_sccp_remove_from_use_list(ir_ctx *ctx, ir_ref from, ir_ref ref)
#endif
}
static void ir_sccp_remove_from_use_list_1(ir_ctx *ctx, ir_ref from, ir_ref ref)
{
ir_ref j, n, *p;
ir_use_list *use_list = &ctx->use_lists[from];
n = use_list->count;
j = 0;
p = &ctx->use_edges[use_list->refs];
while (j < n) {
if (*p == ref) {
break;
}
j++;
}
if (j < n) {
use_list->count--;
j++;
while (j < n) {
*p = *(p+1);
p++;
j++;
}
#if IR_COMBO_COPY_PROPAGATION
*p = IR_UNUSED;
#endif
}
}
#if IR_COMBO_COPY_PROPAGATION
static int ir_sccp_add_to_use_list(ir_ctx *ctx, ir_ref to, ir_ref ref)
{
@ -521,7 +550,7 @@ static void ir_sccp_remove_unfeasible_merge_inputs(ir_ctx *ctx, ir_insn *_values
}
i++;
} else if (!IR_IS_CONST_REF(input)) {
ir_sccp_remove_from_use_list(ctx, input, use);
ir_sccp_remove_from_use_list_1(ctx, input, use);
}
}
while (i <= n) {