diff options
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 9 |
1 files changed, 6 insertions, 3 deletions
@@ -1,6 +1,6 @@ /* Global common subexpression elimination/Partial redundancy elimination and global constant/copy propagation for GNU compiler. - Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -4839,8 +4839,9 @@ one_pre_gcse_pass (pass) } /* If X contains any LABEL_REF's, add REG_LABEL notes for them to INSN. - We have to add REG_LABEL notes, because the following loop optimization - pass requires them. */ + If notes are added to an insn which references a CODE_LABEL, the + LABEL_NUSES count is incremented. We have to add REG_LABEL notes, + because the following loop optimization pass requires them. */ /* ??? This is very similar to the loop.c add_label_notes function. We could probably share code here. */ @@ -4868,6 +4869,8 @@ add_label_notes (x, insn) REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_LABEL, XEXP (x, 0), REG_NOTES (insn)); + if (LABEL_P (XEXP (x, 0))) + LABEL_NUSES (XEXP (x, 0))++; return; } |