41 lines
785 B
C
41 lines
785 B
C
#include "mcg.h"
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static ARRAYOF(struct basicblock) used;
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static void walk_blocks(struct basicblock* bb);
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static bool walk_blocks_cb(struct ir* ir, void* user)
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{
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if (ir->opcode == IR_BLOCK)
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walk_blocks(ir->u.bvalue);
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return false;
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}
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static void walk_blocks(struct basicblock* bb)
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{
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int i;
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if (!array_contains(&used, bb))
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{
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array_append(&used, bb);
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for (i=0; i<bb->irs.count; i++)
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ir_walk(bb->irs.item[i], walk_blocks_cb, NULL);
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}
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}
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void pass_remove_dead_blocks(struct procedure* proc)
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{
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int i, j;
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used.count = 0;
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walk_blocks(proc->blocks.item[0]);
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proc->blocks.count = 0;
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for (i=0; i<used.count; i++)
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array_append(&proc->blocks, used.item[i]);
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}
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/* vim: set sw=4 ts=4 expandtab : */
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