Followup to r16-1613-g34e1e5e33ec3eb. remove_reg_equal_equiv_notes's
2nd argument is 'no_rescan' which we accidentally had on, tripping
an assert in combine or ira because we hadn't left things in a consistent
state.
Fix the thinko by enabling rescanning.
gcc/ChangeLog:
PR rtl-optimization/120795
* ext-dce.cc (ext_dce_try_optimize_insn): Enable rescan in
remove_reg_equal_equiv_notes call.
Co-authored-by: Jeff Law <j...@ventanamicro.com>
---
Preapproved by Jeff on the PR. Regtested on x86_64-pc-linux-gnu. Jeff
guessed the actual problem straight away and did the real work.
Pushed.
gcc/ext-dce.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/ext-dce.cc b/gcc/ext-dce.cc
index b1d5ee4b36c4..df17b018bf1f 100644
--- a/gcc/ext-dce.cc
+++ b/gcc/ext-dce.cc
@@ -446,7 +446,7 @@ ext_dce_try_optimize_insn (rtx_insn *insn, rtx set)
/* INSN may have a REG_EQUAL note indicating that the value was
sign or zero extended. That note is no longer valid since we've
just removed the extension. Just wipe the notes. */
- remove_reg_equal_equiv_notes (insn, true);
+ remove_reg_equal_equiv_notes (insn, false);
}
else
{
base-commit: d0142e147486e6f319704d35930720f6dec648fb
--
2.50.0
