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718930c0c8
This patch fixes an issue with the output of -fdump-analyzer-supergraph on BBs with no statements, where the resulting files were unreadable by dot e.g.: Error: syntax error in line 1 ... <TABLE BORDER="0"></TABLE> ... in label of node node_10 gcc/analyzer/ChangeLog: * supergraph.cc (supernode::dump_dot): Ensure that the TABLE element has at least one TR. gcc/testsuite/ChangeLog: * gcc.dg/analyzer/dot-output.c: Add test coverage for a BB with no statements.
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