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Hi all,</div>
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I have an error I do not understand. My program crashes during the 'Simple Register Coalescing' pass. All I know is that the crash happens inside LiveRange::Query() in llvm/include/llvm/CodeGen/LiveInterval.h and is due to the fact that EarlyVal is null and
causes a crash when evaluating <span>if (EarlyVal->def == Idx.getBaseIndex()). <span style="font-family:Calibri,Helvetica,sans-serif">
What could be the reason why EarlyVal is null?</span></span><span style="font-family:Calibri,Helvetica,sans-serif">
</span><span>The function on which the pass is being run is:</span></div>
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<span></span><span></span><br>
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<span style="font-family:"Courier New",monospace">void foo(uint8_t* input, const uint8_t* key, uint8_t *output, size_t len)</span><span><br>
</span>
<div><span style="font-family:"Courier New",monospace">{</span><br>
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<div><span style="font-family:"Courier New",monospace">uint16_t np1 = (len * 8)/64;</span><br>
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<div><span style="font-family:"Courier New",monospace">uint16_t n = np1 - 1;</span><br>
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<div><span style="font-family:"Courier New",monospace">uint64_t A;</span><br>
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<div><span style="font-family:"Courier New",monospace">uint64_t R[n+1];</span><br>
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<div><span style="font-family:"Courier New",monospace">int i,j;</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(&A,input,8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> for (i = 1; i<= n;i++)</span><br>
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<div><span style="font-family:"Courier New",monospace"> {</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(&R[i], input + 8*i,8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> }</span><br>
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<div><br>
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<div><br>
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<div><span style="font-family:"Courier New",monospace"> for (j = 5; j >= 0; j--)</span><br>
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<div><span style="font-family:"Courier New",monospace"> for (i = n; i >= 1; i--)</span><br>
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<div><span style="font-family:"Courier New",monospace"> {</span><br>
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<div><span style="font-family:"Courier New",monospace"> uint64_t l_input[2] =</span><br>
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<div><span style="font-family:"Courier New",monospace"> {</span><br>
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<div><span style="font-family:"Courier New",monospace"> A ^ (((uint64_t)(n*j+i))<<56),</span><br>
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<div><span style="font-family:"Courier New",monospace"> R[i]</span><br>
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<div><span style="font-family:"Courier New",monospace"> };</span><br>
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<br>
<div><span style="font-family:"Courier New",monospace"> dec((uint8_t*)l_input, key, output);</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(&A,output,8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(&R[i],output+8,8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> }</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(output,&A,8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> int k;</span><br>
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<div><span style="font-family:"Courier New",monospace"> for(k=1;k<(n+1);k++)</span><br>
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<div><span style="font-family:"Courier New",monospace"> {</span><br>
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<div><span style="font-family:"Courier New",monospace"> memcpy(output+8*k,&R[k],8);</span><br>
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<div><span style="font-family:"Courier New",monospace"> }</span><br>
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<span style="font-family:"Courier New",monospace">}</span></div>
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<span style="font-family:"Courier New",monospace"><br>
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Thanks.<br>
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