diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -4100,6 +4100,13 @@ init_propagate_block_info (bb, live, local_set, cond_local_set, flags) { rtx mem = SET_DEST (PATTERN (insn)); + /* This optimization is performed by faking a store to the + memory at the end of the block. This doesn't work for + unchanging memories because multiple stores to unchanging + memory is illegal and alias analysis doesn't consider it. */ + if (RTX_UNCHANGING_P (mem)) + continue; + if (XEXP (mem, 0) == frame_pointer_rtx || (GET_CODE (XEXP (mem, 0)) == PLUS && XEXP (XEXP (mem, 0), 0) == frame_pointer_rtx |