https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91223
Zhendong Su <su at cs dot ucdavis.edu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |su at cs dot ucdavis.edu --- Comment #4 from Zhendong Su <su at cs dot ucdavis.edu> --- Another and somewhat smaller test that triggers the same ICE: [513] % gcctk -v Using built-in specs. COLLECT_GCC=gcctk COLLECT_LTO_WRAPPER=/home/suz/software/gcctk/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --disable-multilib --enable-languages=c,c++,lto --prefix=/home/suz/software/gcctk/gcc-trunk --disable-bootstrap Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.0.0 20190722 (experimental) [trunk revision 273699] (GCC) [514] % [514] % gcctk -O1 small.c during RTL pass: reload small.c: In function ‘main’: small.c:45:1: internal compiler error: in curr_insn_transform, at lra-constraints.c:4459 45 | } | ^ 0xad2168 curr_insn_transform ../../gcc-source-trunk/gcc/lra-constraints.c:4459 0xad4086 lra_constraints(bool) ../../gcc-source-trunk/gcc/lra-constraints.c:4987 0xabbc14 lra(_IO_FILE*) ../../gcc-source-trunk/gcc/lra.c:2468 0xa6deb9 do_reload ../../gcc-source-trunk/gcc/ira.c:5522 0xa6deb9 execute ../../gcc-source-trunk/gcc/ira.c:5706 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. [515] % [515] % cat small.c int printf (const char *, ...); struct S { int f1; int f2; int f3; char f4; int f5; } a, b, c; int d, e, f, j, k, l; int main () { short g[2]; int i = 0; for (; i < 2; i++) g[i] = 1; while (f) { if (l) g[0] ^= c.f4; while (1) { if (j) break; int n = e, o; while (a.f2) { struct S p; if (o) { int q = k && q; printf ("%d", c.f1); if (b.f5) o = p.f3; d = n; } } f = g[0]; } } return 0; }