42 lines
834 B
C
42 lines
834 B
C
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#include "mcg.h"
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static bool rewrite_jumps_cb(struct ir* ir, void* user)
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{
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if (ir->opcode == IR_BLOCK)
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{
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struct basicblock* bb = ir->u.bvalue;
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if ((bb->irs_count > 0)
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&& (bb->irs[0]->opcode == IR_JUMP)
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&& (bb->irs[0]->left->opcode == IR_BLOCK))
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{
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ir->u.bvalue = bb->irs[0]->left->u.bvalue;
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}
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}
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return false;
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}
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static void rewrite_jumps(struct basicblock* bb)
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{
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int i;
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for (i=0; i<bb->irs_count; i++)
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{
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struct ir* ir = bb->irs[i];
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ir_walk(ir, rewrite_jumps_cb, NULL);
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}
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}
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void pass_eliminate_trivial_blocks(struct procedure* proc)
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{
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int i;
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for (i=0; i<proc->blocks_count; i++)
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{
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struct basicblock* bb = proc->blocks[i];
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rewrite_jumps(bb);
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}
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}
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/* vim: set sw=4 ts=4 expandtab : */
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