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
