This moves VRP after late DOM. This is because VRP has a hard
time dealing with non-copyproped (and not CSEd) IL and conveniently
DOM provides both. I noticed this when working on PR56273 where
we miss quite some VRP opportunities because of this.
I cannot think of a good reason to have the current order, so I am
going ahead with this after SVN is back.
Bootstrap and regtest running on x86_64-unknown-linux-gnu.
While I have the patch in my tree for quite a while I don't
remember testing it, so the patch may get some additional
testsuite fallout changes.
Richard.
2013-03-18 Richard Biener <rguent...@suse.de>
PR tree-optimization/56273
* passes.c (init_optimization_passes): Move second VRP after DOM.
Index: gcc/passes.c
===================================================================
--- gcc/passes.c (revision 195938)
+++ gcc/passes.c (working copy)
@@ -1488,7 +1488,6 @@ init_optimization_passes (void)
NEXT_PASS (pass_lower_vector_ssa);
NEXT_PASS (pass_cse_reciprocals);
NEXT_PASS (pass_reassoc);
- NEXT_PASS (pass_vrp);
NEXT_PASS (pass_strength_reduction);
NEXT_PASS (pass_dominator);
/* The only const/copy propagation opportunities left after
@@ -1497,6 +1496,7 @@ init_optimization_passes (void)
only examines PHIs to discover const/copy propagation
opportunities. */
NEXT_PASS (pass_phi_only_cprop);
+ NEXT_PASS (pass_vrp);
NEXT_PASS (pass_cd_dce);
NEXT_PASS (pass_tracer);
