https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113178
Bug ID: 113178 Summary: ice in find_uses_to_rename_use Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com Target Milestone: --- This C++ source code: struct PixelWeight { int m_SrcStart; int m_Weights[]; }; struct CWeightTable { int *GetValueFromPixelWeight(PixelWeight *, int) const; }; char ContinueStretchHorz_dest_scan; struct CStretchEngine { bool ContinueStretchHorz(); CWeightTable m_WeightTable; }; int *CWeightTable::GetValueFromPixelWeight(PixelWeight *pWeight, int index) const { long __trans_tmp_1; if (index < pWeight->m_SrcStart) return __trans_tmp_1 ? &pWeight->m_Weights[pWeight->m_SrcStart] : nullptr; } bool CStretchEngine::ContinueStretchHorz() { { PixelWeight pPixelWeights; int dest_g_m; for (int j; j; j++) { int pWeight = *m_WeightTable.GetValueFromPixelWeight(&pPixelWeights, j); dest_g_m += pWeight; } ContinueStretchHorz_dest_scan = dest_g_m; } } when compiled by recent gcc trunk, does this: cvise $ ~/gcc/results.20231227.asan.ubsan/bin/g++ -c -O3 -w bug995.cc cvise $ ~/gcc/results.20231227.asan.ubsan/bin/g++ -c -O3 -w -march=znver3 bug995.cc during GIMPLE pass: vect bug995.cc: In member function ‘bool CStretchEngine::ContinueStretchHorz()’: bug995.cc:19:6: internal compiler error: Segmentation fault 19 | bool CStretchEngine::ContinueStretchHorz() { | ^~~~~~~~~~~~~~ 0x11e1b39 crash_signal(int) ../../trunk.20210101/gcc/toplev.cc:316 0x1381b98 find_uses_to_rename_use(basic_block_def*, tree_node*, bitmap_head**, bitmap_head*) ../../trunk.20210101/gcc/tree-ssa-loop-manip.cc:414