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Fix -O0 register allocator

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This commit is contained in:
Dmitry Stogov 2022-05-17 01:47:44 +03:00
parent 3e5f151502
commit fd457e3590
1 changed files with 9 additions and 1 deletions
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10
ir_x86.dasc
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@ -4102,7 +4102,7 @@ static void ir_allocate_unique_spill_slots(ir_ctx *ctx)
case IR_SKIP_REG: /* PARAM PHI PI */
/* skip */
if (ctx->rules && *rule != IR_CMP_AND_BRANCH_INT && *rule != IR_CMP_AND_BRANCH_FP) {
available = IR_REGSET_UNION(IR_REGSET_GP, IR_REGSET_FP);
available = IR_REGSET_SCRATCH;
}
if (ctx->vregs[i]) {
if (ir_get_use_flags(ctx, i, 0) & IR_USE_MUST_BE_IN_REG) {
@ -4168,6 +4168,14 @@ static void ir_allocate_unique_spill_slots(ir_ctx *ctx)
insn_flags = ir_op_flags[insn->op];
n = ir_input_edges_count(ctx, insn);
if (n > 0) {
ir_live_pos start, end;
ir_regset scratch = ir_get_scratch_regset(ctx, i, &start, &end);
if (!IR_REGSET_IS_EMPTY(scratch) && start == IR_LOAD_SUB_REF) {
available = IR_REGSET_DIFFERENCE(available, scratch);
}
}
for (j = 1, p = insn->ops + 1; j <= n; j++, p++) {
ir_ref input = *p;
if (IR_OPND_KIND(insn_flags, j) == IR_OPND_DATA && input > 0 && ctx->vregs[input]) {