(try_combine): Only use I2DEST as a scratch reg for
a split if it does not overlap any inputs of NEWPAT. From-SVN: r2857
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@ -1535,7 +1535,15 @@ try_combine (i3, i2, i1)
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convert I2DEST to the mode of the source of NEWPAT if we can. */
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m_split = split_insns (newpat, i3);
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if (m_split == 0)
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/* We can only use I2DEST as a scratch reg if it doesn't overlap any
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inputs of NEWPAT. */
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/* ??? If I2DEST is not safe, and I1DEST exists, then it would be
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possible to try that as a scratch reg. This would require adding
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more code to make it work though. */
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if (m_split == 0 && ! reg_overlap_mentioned_p (ni2dest, newpat))
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{
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/* If I2DEST is a hard register or the only use of a pseudo,
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we can change its mode. */
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