[gcc r11-9723] cfgrtl: Fix up -g vs. -g0 code generation -flto differences in fixup_reorder_chain [PR104589]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:7737259ceaa490a1cc75415efa00f3631a7e17df

commit r11-9723-g7737259ceaa490a1cc75415efa00f3631a7e17df
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Mar 2 10:48:14 2022 +0100

    cfgrtl: Fix up -g vs. -g0 code generation -flto differences in fixup_reorder_chain [PR104589]
    
    This is similar to PR104237 and similarly to that, no testcase included
    for the testsuite, as we don't have a framework to compile/link with
    -g -flto and -g0 -flto and compare -fdump-final-insns= results from
    the lto1 compilations.
    
    With -flto, whether two location_t compare equal or not and just
    express the same location is a lottery.
    
    2022-03-02  Jakub Jelinek  <jakub@redhat.com>
    
            PR rtl-optimization/104589
            * cfgrtl.c (fixup_reorder_chain): Use loc_equal instead of direct
            INSN_LOCATION comparison with goto_locus.
    
    (cherry picked from commit 2e1b00367abaf8b6dbb47fd8518d9ac69c326a06)

Diff:
---
 gcc/cfgrtl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index 418b957e050..8fd128b471c 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -4120,7 +4120,7 @@ fixup_reorder_chain (void)
 		     && (!NONDEBUG_INSN_P (insn) || !INSN_HAS_LOCATION (insn)))
 		insn = PREV_INSN (insn);
 	      if (insn != end
-		  && INSN_LOCATION (insn) == e->goto_locus)
+		  && loc_equal (INSN_LOCATION (insn), e->goto_locus))
 		continue;
 	      if (simplejump_p (BB_END (e->src))
 		  && !INSN_HAS_LOCATION (BB_END (e->src)))
@@ -4142,7 +4142,7 @@ fixup_reorder_chain (void)
 		  while (insn != end && !NONDEBUG_INSN_P (insn))
 		    insn = NEXT_INSN (insn);
 		  if (insn != end && INSN_HAS_LOCATION (insn)
-		      && INSN_LOCATION (insn) == e->goto_locus)
+		      && loc_equal (INSN_LOCATION (insn), e->goto_locus))
 		    continue;
 		}
 	      nb = split_edge (e);