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...e newBB, including the old terminator." So, the terminator of the newBB is exactly the same as the terminator of the oldBB. IF the oldBB has multiple successors, then newBB will have multiple successors. Actually there is an example for this (in "wc", the word count program): for (gotsp = 1; len = read(fd, buf, MAXBSIZE);){ if (len == -1) { perror(file); exit(1); } // do other stuff } Compiled with llvm-gcc -O1, the loop header has three successors: one to inside the loop, one to outside the loop, and the third to a block that contains exit(1). ExtractLoop() has pr...

On Nov 19, 2008, at 7:41 AM, Jack Tzu-Han Hung wrote: > Hi, > > I found a problem in CodeExtractor::severSplitPHINodes() > <CodeExtractor.cpp>. > > The algorithm first separates the header block into two, one > containing only PHI nodes and the other containing the remaining non- > PHI nodes. The variable NewBB holds the pointer to the latter half > block.

Hi, I found a problem in CodeExtractor::severSplitPHINodes() <CodeExtractor.cpp>. The algorithm first separates the header block into two, one containing only PHI nodes and the other containing the remaining non-PHI nodes. The variable NewBB holds the pointer to the latter half block. Later, it tries to update DT information. if (DT) DT->splitBlock(NewBB); In splitBlock, it checks