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SCC-Copy: Add More Debug dumps

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While debugging a failure, I noticed that SCC copy didn't print
out what it was doing, e.g. replacing name1 with name 2.
This adds that dump.

Bootstrapped and tested on x86_64-linux-gnu.

gcc/ChangeLog:

	* gimple-ssa-sccopy.cc (scc_copy_prop::replace_scc_by_value): Dump
	what is being replaced with what.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
This commit is contained in:
Andrew Pinski 2025-03-17 11:28:16 -07:00
parent 453d42046c
commit cfbabe10dd
1 changed files with 10 additions and 0 deletions
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10
gcc/gimple-ssa-sccopy.cc
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@ -38,6 +38,7 @@ along with GCC; see the file COPYING3. If not see
#include "builtins.h"
#include "tree-ssa-dce.h"
#include "fold-const.h"
#include "tree-pretty-print.h"
/* Strongly connected copy propagation pass.
@ -485,6 +486,15 @@ scc_copy_prop::replace_scc_by_value (vec<gimple *> scc, tree val)
for (gimple *stmt : scc)
{
tree name = gimple_get_lhs (stmt);
if (dump_file && (dump_flags & TDF_DETAILS))
{
fprintf (dump_file, "Replacing ");
print_generic_expr (dump_file, name);
fprintf (dump_file, " with ");
print_generic_expr (dump_file, val);
fprintf (dump_file, "\n");
}
replace_uses_by (name, val);
bitmap_set_bit (dead_stmts, SSA_NAME_VERSION (name));
}