From: Richard Biener <rguenther@suse.de>
Date: Fri, 24 Jan 2025 08:13:17 +0000 (+0100)
Subject: tree-optimization/118634 - improve cunroll dump
X-Git-Tag: basepoints/gcc-16~2378
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dc1e1b38ce60cd1da781c7dcd97a36add5482a00;p=thirdparty%2Fgcc.git

tree-optimization/118634 - improve cunroll dump

We no longer subtract the estimated eliminated number of instructions
from the estimated size after unrolling we print - this is a bit
confusing when comparing dumps to previous releases.  The following
changes the dump from

  Estimated size after unrolling: 42

to

  Estimated size after unrolling: 42-12

for the testcase in the PR.

	PR tree-optimization/118634
	* tree-ssa-loop-ivcanon.cc (try_unroll_loop_completely):
	Dump the number of estimated eliminated insns.
---

diff --git a/gcc/tree-ssa-loop-ivcanon.cc b/gcc/tree-ssa-loop-ivcanon.cc
index d07b3d593f5..ca6295c7de2 100644
--- a/gcc/tree-ssa-loop-ivcanon.cc
+++ b/gcc/tree-ssa-loop-ivcanon.cc
@@ -855,8 +855,8 @@ try_unroll_loop_completely (class loop *loop,
 	  if (dump_file && (dump_flags & TDF_DETAILS))
 	    {
 	      fprintf (dump_file, "  Loop size: %d\n", (int) ninsns);
-	      fprintf (dump_file, "  Estimated size after unrolling: %d\n",
-		       (int) unr_insns);
+	      fprintf (dump_file, "  Estimated size after unrolling: %d-%d\n",
+		       (int) unr_insns, (int) est_eliminated);
 	    }
 
 	  /* If the code is going to shrink, we don't need to be extra