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| author | Dan Nicolaescu <dann@ics.uci.edu> | 2001-10-24 18:58:15 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2001-10-24 12:58:15 -0600 |
| commit | 83c66c1e7a8cb96d3d429fceb49b1025295b5667 (patch) | |
| tree | 4e5e4d6b88785120d6f5705ef1ec0f1df947d36e /gcc | |
| parent | b8a5867e51cdef2b62d67884df4ecbfc16ee6aca (diff) | |
| download | gcc-83c66c1e7a8cb96d3d429fceb49b1025295b5667.zip gcc-83c66c1e7a8cb96d3d429fceb49b1025295b5667.tar.gz gcc-83c66c1e7a8cb96d3d429fceb49b1025295b5667.tar.bz2 | |
ssa-ccp.c (ssa_ccp_substitute_constants): Don't do anything if the node was already a set to a constant.
* ssa-ccp.c (ssa_ccp_substitute_constants): Don't do anything if
the node was already a set to a constant.
From-SVN: r46468
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/ssa-ccp.c | 9 |
2 files changed, 12 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f595b36..69d605d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-10-24 Dan Nicolaescu <dann@ics.uci.edu> + + * ssa-ccp.c (ssa_ccp_substitute_constants): Don't do anything if + the node was already a set to a constant. + Wed Oct 24 12:41:19 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> * emit-rtl.c (set_mem_attributes): Fix typo in last change. 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, |