diff options
Diffstat (limited to 'gcc/ssa-ccp.c')
| -rw-r--r-- | gcc/ssa-ccp.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/ssa-ccp.c b/gcc/ssa-ccp.c index 047b29d..c2f1b78 100644 --- a/gcc/ssa-ccp.c +++ b/gcc/ssa-ccp.c @@ -866,8 +866,13 @@ ssa_ccp_substitute_constants () /* Do not try to simplify PHI nodes down to a constant load. That will be done later as we translate out of SSA. Also, doing that here could violate the rule that all PHI nodes - are consecutive at the start of the basic block. */ - if (! PHI_NODE_P (def)) + are consecutive at the start of the basic block. + + Don't do anything to nodes that were already sets to + constants. */ + if (! PHI_NODE_P (def) + && ! ((GET_CODE (def) == INSN + && GET_CODE (SET_SRC (set)) == CONST_INT))) { if (rtl_dump_file) fprintf (rtl_dump_file, |