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[PATCH] Add -fopt-info-loop support for interchange.
- From: Richard Biener <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Fri, 8 Dec 2017 12:23:17 +0100 (CET)
- Subject: [PATCH] Add -fopt-info-loop support for interchange.
- Authentication-results: sourceware.org; auth=none
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
Richard.
2017-12-08 Richard Biener <rguenther@suse.de>
* gimple-loop-interchange.cc (tree_loop_interchange::interchange):
Provide -fopt-info-loop feedback when we interchange in a nest.
Index: gcc/gimple-loop-interchange.cc
===================================================================
--- gcc/gimple-loop-interchange.cc (revision 255499)
+++ gcc/gimple-loop-interchange.cc (working copy)
@@ -1550,6 +1550,7 @@ bool
tree_loop_interchange::interchange (vec<data_reference_p> datarefs,
vec<ddr_p> ddrs)
{
+ location_t loc = find_loop_location (m_loop_nest[0]);
bool changed_p = false;
/* In each iteration we try to interchange I-th loop with (I+1)-th loop.
The overall effect is to push inner loop to outermost level in whole
@@ -1597,8 +1598,12 @@ tree_loop_interchange::interchange (vec<
oloop.m_loop->num, iloop.m_loop->num);
}
}
-
simple_dce_from_worklist (m_dce_seeds);
+
+ if (changed_p)
+ dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, loc,
+ "loops interchanged in loop nest\n");
+
return changed_p;
}