[gcc(refs/users/aoliva/heads/testme)] fold_truth_andor: drop known-result warnings

[Alexandre Oliva via Gcc-cvs]

https://gcc.gnu.org/g:c3312f371fec4ef332df93203852f0fae79b4842

commit c3312f371fec4ef332df93203852f0fae79b4842
Author: Alexandre Oliva <ol...@gnu.org>
Date:   Thu Nov 21 22:36:42 2024 -0300

    fold_truth_andor: drop known-result warnings

Diff:
---
 gcc/config/i386/t-i386     |  2 --
 gcc/config/rs6000/t-rs6000 |  4 ----
 gcc/gimple-fold.cc         | 14 ++------------
 3 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/gcc/config/i386/t-i386 b/gcc/config/i386/t-i386
index 1b904787ec62..bf4ae109af98 100644
--- a/gcc/config/i386/t-i386
+++ b/gcc/config/i386/t-i386
@@ -79,5 +79,3 @@ s-i386-bt: $(srcdir)/config/i386/i386-builtin-types.awk \
        $(AWK) -f $^ > tmp-bt.inc
        $(SHELL) $(srcdir)/../move-if-change tmp-bt.inc i386-builtin-types.inc
        $(STAMP) $@
-
-insn-attrtab.o-warn = -Wno-error
diff --git a/gcc/config/rs6000/t-rs6000 b/gcc/config/rs6000/t-rs6000
index a83968d663a6..155788de40a3 100644
--- a/gcc/config/rs6000/t-rs6000
+++ b/gcc/config/rs6000/t-rs6000
@@ -95,10 +95,6 @@ $(srcdir)/config/rs6000/rs6000-tables.opt: 
$(srcdir)/config/rs6000/genopt.sh \
        $(SHELL) $(srcdir)/config/rs6000/genopt.sh $(srcdir)/config/rs6000 > \
                $(srcdir)/config/rs6000/rs6000-tables.opt
 
-# FRAME_GROWS_DOWNWARD tests flag_sanitize in a way that rules out a
-# test in toplev.c.
-toplev.o-warn = -Wno-error
-
 # The rs6000 backend doesn't cause warnings in these files.
 insn-conditions.o-warn =
 
diff --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc
index d55e5941c1ae..1abf09470567 100644
--- a/gcc/gimple-fold.cc
+++ b/gcc/gimple-fold.cc
@@ -8421,19 +8421,9 @@ fold_truth_andor_maybe_separate (location_t loc,
                                                result, r_const)) != 1)
        {
          if (wanted_code == NE_EXPR)
-           {
-             warning (0,
-                      "%<or%> of unmatched not-equal tests"
-                      " is always 1");
-             return constant_boolean_node (true, truth_type);
-           }
+           return constant_boolean_node (true, truth_type);
          else
-           {
-             warning (0,
-                      "%<and%> of mutually exclusive equal-tests"
-                      " is always 0");
-             return constant_boolean_node (false, truth_type);
-           }
+           return constant_boolean_node (false, truth_type);
        }
 
       if (lnbitpos < 0)