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original code was matching like this: if (match(A, m_Not(m_Value(B)))) B was already matched as a 'select' instruction. However, this isn't matching what we think it's matching. It would match B as a 'Value', so basically anything would match to it. In this case, a Constant matched. B was replaced with a constant representation. And then the wrong value would be used in the SelectInst::Create statement, causing a crash. After thinking on this for a moment, and after Nick L. told me how the pattern matching stuff was supposed to work, the solution was to match NOT an m_Value, but an m_Select. llvm-svn: 58946
18 lines
218 B
C
18 lines
218 B
C
// RUN: %llvmgcc %s -S -emit-llvm -O2 -o -
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// PR3028
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int g_187;
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int g_204;
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int g_434;
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int func_89 (void)
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{
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return 1;
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}
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void func_20 (int p_22)
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{
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if (1 & p_22 | g_204 & (1 < g_187) - func_89 ())
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g_434 = 1;
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}
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