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Introduce IR_PREALLOCATED_STACK flag

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This commit is contained in:
Dmitry Stogov 2022-05-17 13:15:41 +03:00
parent 1e7059d7e0
commit da5de8a390
2 changed files with 14 additions and 12 deletions
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3
ir.h
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@ -473,7 +473,8 @@ typedef struct _ir_use_list {
#define IR_FUNCTION (1<<0)
#define IR_USE_FRAME_POINTER (1<<1)
#define IR_IRREDUCIBLE_CFG (1<<2)
#define IR_PREALLOCATED_STACK (1<<2)
#define IR_IRREDUCIBLE_CFG (1<<3)
#define IR_OPT_FOLDING (1<<16)
#define IR_OPT_CODEGEN (1<<17)

3
ir_x86.dasc
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@ -3613,7 +3613,7 @@ static int32_t ir_emit_arguments(ir_ctx *ctx, ir_ref def, ir_insn *insn, ir_reg
bool has_mem_const_args = 0;
ir_reg tmp_fp_reg = IR_REG_FP_LAST; /* Temporary register for FP loads and swap */
if (0) {
if (insn->op == IR_CALL && (ctx->flags & IR_PREALLOCATED_STACK)) {
// TODO: support for preallocated stack
used_stack = 0;
} else {
@ -4401,6 +4401,7 @@ static void ir_calc_stack_frame_size(ir_ctx *ctx, ir_backend_data *data)
data->stack_frame_alignment += 8;
}
} else {
// TODO: Preallocate stack for calls (ctx->flags |= IR_PREALLOCATED_STACK)
while (IR_ALIGNED_SIZE(data->stack_frame_size + sizeof(void*), 16) != data->stack_frame_size + sizeof(void*)) {
data->stack_frame_size += 8;
data->stack_frame_alignment += 8;