217 lines
8.7 KiB
C
217 lines
8.7 KiB
C
#include <stdint.h>
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#include <86box/86box.h>
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#include "cpu.h"
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#include <86box/mem.h>
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#include "codegen.h"
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#include "codegen_allocator.h"
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#include "codegen_backend.h"
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#include "codegen_ir.h"
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#include "codegen_reg.h"
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extern int has_ea;
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static ir_data_t ir_block;
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static int codegen_unroll_start, codegen_unroll_count;
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static int codegen_unroll_first_instruction;
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ir_data_t *codegen_ir_init()
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{
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ir_block.wr_pos = 0;
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codegen_unroll_count = 0;
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return &ir_block;
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}
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void codegen_ir_set_unroll(int count, int start, int first_instruction)
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{
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codegen_unroll_count = count;
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codegen_unroll_start = start;
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codegen_unroll_first_instruction = first_instruction;
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}
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static void duplicate_uop(ir_data_t *ir, uop_t *uop, int offset)
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{
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uop_t *new_uop = uop_alloc(ir, uop->type);
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if (!ir_reg_is_invalid(uop->src_reg_a))
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new_uop->src_reg_a = codegen_reg_read(uop->src_reg_a.reg);
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if (!ir_reg_is_invalid(uop->src_reg_b))
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new_uop->src_reg_b = codegen_reg_read(uop->src_reg_b.reg);
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if (!ir_reg_is_invalid(uop->src_reg_c))
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new_uop->src_reg_c = codegen_reg_read(uop->src_reg_c.reg);
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if (!ir_reg_is_invalid(uop->dest_reg_a))
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new_uop->dest_reg_a = codegen_reg_write(uop->dest_reg_a.reg, ir->wr_pos-1);
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new_uop->type = uop->type;
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new_uop->imm_data = uop->imm_data;
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new_uop->p = uop->p;
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new_uop->pc = uop->pc;
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if (uop->jump_dest_uop != -1)
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{
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new_uop->jump_dest_uop = uop->jump_dest_uop + offset;
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}
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}
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void codegen_ir_compile(ir_data_t *ir, codeblock_t *block)
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{
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int jump_target_at_end = -1;
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int c;
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if (codegen_unroll_count)
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{
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int unroll_count;
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int unroll_end;
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codegen_set_loop_start(ir, codegen_unroll_first_instruction);
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unroll_end = ir->wr_pos;
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for (unroll_count = 1; unroll_count < codegen_unroll_count; unroll_count++)
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{
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int offset = ir->wr_pos - codegen_unroll_start;
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// pclog("Unroll from %i to %i, offset %i - iteration %i\n", codegen_unroll_start, ir->wr_pos, offset, unroll_count);
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for (c = codegen_unroll_start; c < unroll_end; c++)
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{
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// pclog(" Duplicate uop %i\n", c);
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duplicate_uop(ir, &ir->uops[c], offset);
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}
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}
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}
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codegen_reg_mark_as_required();
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codegen_reg_process_dead_list(ir);
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block_write_data = codeblock_allocator_get_ptr(block->head_mem_block);
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block_pos = 0;
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codegen_backend_prologue(block);
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for (c = 0; c < ir->wr_pos; c++)
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{
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uop_t *uop = &ir->uops[c];
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// pclog("uOP %i : %08x\n", c, uop->type);
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if (uop->type & UOP_TYPE_BARRIER)
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codegen_reg_flush_invalidate(ir, block);
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if (uop->type & UOP_TYPE_JUMP_DEST)
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{
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uop_t *uop_dest = uop;
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while (uop_dest->jump_list_next != -1)
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{
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uop_dest = &ir->uops[uop_dest->jump_list_next];
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codegen_set_jump_dest(block, uop_dest->p);
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}
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}
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if ((uop->type & UOP_MASK) == UOP_INVALID)
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continue;
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#ifdef CODEGEN_BACKEND_HAS_MOV_IMM
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if ((uop->type & UOP_MASK) == (UOP_MOV_IMM & UOP_MASK) && reg_is_native_size(uop->dest_reg_a) && !codegen_reg_is_loaded(uop->dest_reg_a) && reg_version[IREG_GET_REG(uop->dest_reg_a.reg)][uop->dest_reg_a.version].refcount <= 0)
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{
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/*Special case for UOP_MOV_IMM - if destination not already in host register
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and won't be used again then just store directly to memory*/
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codegen_reg_write_imm(block, uop->dest_reg_a, uop->imm_data);
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}
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else
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#endif
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if ((uop->type & UOP_MASK) == (UOP_MOV & UOP_MASK) && reg_version[IREG_GET_REG(uop->src_reg_a.reg)][uop->src_reg_a.version].refcount <= 1 &&
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reg_is_native_size(uop->src_reg_a) && reg_is_native_size(uop->dest_reg_a))
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{
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/*Special case for UOP_MOV - if source register won't be used again then
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just rename it to dest register instead of moving*/
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codegen_reg_alloc_register(invalid_ir_reg, uop->src_reg_a, invalid_ir_reg, invalid_ir_reg);
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uop->src_reg_a_real = codegen_reg_alloc_read_reg(block, uop->src_reg_a, NULL);
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codegen_reg_rename(block, uop->src_reg_a, uop->dest_reg_a);
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if (uop->type & UOP_TYPE_ORDER_BARRIER)
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codegen_reg_flush(ir, block);
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}
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else
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{
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if (uop->type & UOP_TYPE_PARAMS_REGS)
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{
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codegen_reg_alloc_register(uop->dest_reg_a, uop->src_reg_a, uop->src_reg_b, uop->src_reg_c);
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if (uop->src_reg_a.reg != IREG_INVALID)
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{
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uop->src_reg_a_real = codegen_reg_alloc_read_reg(block, uop->src_reg_a, NULL);
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}
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if (uop->src_reg_b.reg != IREG_INVALID)
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{
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uop->src_reg_b_real = codegen_reg_alloc_read_reg(block, uop->src_reg_b, NULL);
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}
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if (uop->src_reg_c.reg != IREG_INVALID)
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{
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uop->src_reg_c_real = codegen_reg_alloc_read_reg(block, uop->src_reg_c, NULL);
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}
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}
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if (uop->type & UOP_TYPE_ORDER_BARRIER)
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codegen_reg_flush(ir, block);
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if (uop->type & UOP_TYPE_PARAMS_REGS)
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{
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if (uop->dest_reg_a.reg != IREG_INVALID)
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{
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uop->dest_reg_a_real = codegen_reg_alloc_write_reg(block, uop->dest_reg_a);
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}
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}
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#ifndef RELEASE_BUILD
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if (!uop_handlers[uop->type & UOP_MASK])
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fatal("!uop_handlers[uop->type & UOP_MASK] %08x\n", uop->type);
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#endif
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uop_handlers[uop->type & UOP_MASK](block, uop);
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}
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if (uop->type & UOP_TYPE_JUMP)
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{
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if (uop->jump_dest_uop == ir->wr_pos)
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{
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if (jump_target_at_end == -1)
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jump_target_at_end = c;
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else
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{
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uop_t *uop_dest = &ir->uops[jump_target_at_end];
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while (uop_dest->jump_list_next != -1)
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uop_dest = &ir->uops[uop_dest->jump_list_next];
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uop_dest->jump_list_next = c;
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}
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}
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else
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{
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uop_t *uop_dest = &ir->uops[uop->jump_dest_uop];
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while (uop_dest->jump_list_next != -1)
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uop_dest = &ir->uops[uop_dest->jump_list_next];
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uop_dest->jump_list_next = c;
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ir->uops[uop->jump_dest_uop].type |= UOP_TYPE_JUMP_DEST;
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}
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}
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}
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codegen_reg_flush_invalidate(ir, block);
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if (jump_target_at_end != -1)
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{
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uop_t *uop_dest = &ir->uops[jump_target_at_end];
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while (1)
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{
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codegen_set_jump_dest(block, uop_dest->p);
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if (uop_dest->jump_list_next == -1)
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break;
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uop_dest = &ir->uops[uop_dest->jump_list_next];
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}
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}
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codegen_backend_epilogue(block);
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block_write_data = NULL;
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// if (has_ea)
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// fatal("IR compilation complete\n");
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}
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