------- Comment #5 from ubizjak at gmail dot com 2010-01-05 13:52 ------- Minimized testcase (from other bootstrap failure): --cut here-- typedef struct { struct { int how; } reg[64 + 1]; } _Unwind_FrameState; alpha_fallback_frame_state (_Unwind_FrameState * fs) { long i; for (i = 0; i < 31; ++i) fs->reg[i + 32].how = 0; } --cut here-- ~/gcc-build-test/gcc/cc1 -O2 -quiet t1.c t1.c: In function ‘alpha_fallback_frame_state’: t1.c:10:1: error: definition in block 3 does not dominate use in block 2 for SSA_NAME: i_11 in statement: D.2028_3 = i_11 + 32; t1.c:10:1: internal compiler error: verify_ssa failed Please submit a full bug report, with preprocessed source if appropriate. See for instructions. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42511