https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92029
Bug ID: 92029
Summary: Regression: 'libgomp.fortran/pr90779.f90' ICE for
nvptx offloading
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: openmp
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: jakub at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
With r273435 "Support folding from array ctor spanning multiple elements", I'm
seeing a regression with nvptx offloading:
[-PASS:-]{+FAIL: libgomp.fortran/pr90779.f90 -O (internal compiler
error)+}
{+FAIL:+} libgomp.fortran/pr90779.f90 -O (test for excess errors)
[-PASS:-]{+UNRESOLVED:+} libgomp.fortran/pr90779.f90 -O [-execution
test-]{+compilation failed to produce executable+}
lto1: internal compiler error: Segmentation fault
0xb51d7f crash_signal
[...]/source-gcc/gcc/toplev.c:326
0x9bd8c2 input_offload_tables(bool)
[...]/source-gcc/gcc/lto-cgraph.c:1786
0x5d7a6b read_cgraph_and_symbols(unsigned int, char const**)
[...]/source-gcc/gcc/lto/lto-common.c:2796
0x5b9bb2 lto_main()
[...]/source-gcc/gcc/lto/lto.c:622
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mkoffload: fatal error:
[...]/install/offload-nvptx-none/bin//x86_64-pc-linux-gnu-accel-nvptx-none-gcc
returned 1 exit status
That's 'gcc/lto-cgraph.c':
1776 else if (tag == LTO_symtab_variable)
1777 {
1778 int decl_index = streamer_read_uhwi (ib);
1779 tree var_decl
1780 = lto_file_decl_data_get_var_decl (file_data,
decl_index);
1781 vec_safe_push (offload_vars, var_decl);
1782
1783 /* Prevent IPA from removing var_decl as unused,
since there
1784 may be no refs to var_decl in offload LTO mode.
*/
1785 if (do_force_output)
1786 varpool_node::get (var_decl)->force_output = 1;
With pre-requisite r274114 and then r273435 reverted, the ICE disappears.
