https://gcc.gnu.org/g:109f1b28fc94c93096506e3df0c25e331cef19d0
commit r14-9885-g109f1b28fc94c93096506e3df0c25e331cef19d0
Author: Richard Biener <rguent...@suse.de>
Date: Wed Apr 10 07:57:03 2024 +0200
Revert "combine: Don't combine if I2 does not change"
This reverts commit 839bc42772ba7af66af3bd16efed4a69511312ae.
Diff:
---
gcc/combine.cc | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/gcc/combine.cc b/gcc/combine.cc
index 71c9abc145c..92b8d98e6c1 100644
--- a/gcc/combine.cc
+++ b/gcc/combine.cc
@@ -4196,17 +4196,6 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1,
rtx_insn *i0,
adjust_for_new_dest (i3);
}
- /* If I2 didn't change, this is not a combination (but a simplification or
- canonicalisation with context), which should not be done here. Doing
- it here explodes the algorithm. Don't. */
- if (rtx_equal_p (newi2pat, PATTERN (i2)))
- {
- if (dump_file)
- fprintf (dump_file, "i2 didn't change, not doing this\n");
- undo_all ();
- return 0;
- }
-
/* We now know that we can do this combination. Merge the insns and
update the status of registers and LOG_LINKS. */
