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If analyzeBranch fails, on some targets, the out parameters point to some blocks in the function. But we can't use that information, so make sure to clear it out. (In some places in IfConversion, we assume that any block with a TrueBB is analyzable.) The change to the testcase makes it trigger a bug on builds without this fix: IfConvertDiamond tries to perform a followup "merge" operation, which isn't legal, and we somehow end up with a branch to a deleted MBB. I'm not sure how this doesn't crash the compiler. Differential Revision: https://reviews.llvm.org/D67306 llvm-svn: 371434 |
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