If a unconditional branch is added to branch to the false path during ifcvt, the predicated block cannot be iteratively ifcvted.

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and expression separately.  We can get around this, however, by only keeping
opaque values in TMP_GEN.

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Use separate pass id for CFGOnlyPrinter.

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by LICM.

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VMCore, BitCode, and Assembly. Documentation and test case paramattrs.ll
updated also.

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If the predicated block requires an early exit, end the block there and add a unconditional branch to false block. AnalyzeBranch() does not understand early exits.

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Thanks Chuck!

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the difference manually instead.

This allows GVNPRE to produce correct analysis for the example in the GVNPRE
paper.

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This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll

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