https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68672
Bug ID: 68672 Summary: [4.9/5/6 Regression] g++.dg/torture/pr68470.C: ICE: cannot update SSA form: statement uses released SSA name Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Created attachment 36896 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36896&action=edit preprocessed g++.dg/torture/pr68470.C Compiler output: $ x86_64-pc-linux-gnu-gcc -v -O -finline-small-functions -fpartial-inlining --param=partial-inlining-entry-probability=100 pr68470.ii Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-231194-checking-yes-rtl-df-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-231194-checking-yes-rtl-df-nographite Thread model: posix gcc version 6.0.0 20151202 (experimental) (GCC) /repo/gcc-trunk/gcc/testsuite/g++.dg/torture/pr68470.C: In member function 'virtual void I::m_fn3()': /repo/gcc-trunk/gcc/testsuite/g++.dg/torture/pr68470.C:35:1: error: statement uses released SSA name: } ^ # .MEM_20 = VDEF <.MEM> MEM[(struct &)_12] ={v} {CLOBBER}; The use of _12 should have been replaced /repo/gcc-trunk/gcc/testsuite/g++.dg/torture/pr68470.C:35:1: internal compiler error: cannot update SSA form 0xdfa08c update_ssa(unsigned int) /repo/gcc-trunk/gcc/tree-into-ssa.c:3190 0xc5f257 execute_function_todo /repo/gcc-trunk/gcc/passes.c:1926 0xc5fc9b execute_todo /repo/gcc-trunk/gcc/passes.c:2010 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. Tested revisions: trunk r231194 - ICE 5-branch r231055 - ICE 4_9-branch 231054 - ICE 4_8-branch r224828 - OK