11.5.0-7

Fix folding of BIT_NOT_EXPR for POLY_INT_CST (PR 118976, RHEL-90239)

Resolves: RHEL-90239

gcc.spec

@@ -4,7 +4,7 @@
 %global gcc_major 11
 # Note, gcc_release must be integer, if you want to add suffixes to
 # %%{release}, append them after %%{gcc_release} on Release: line.
-%global gcc_release 6
+%global gcc_release 7
 %global nvptx_tools_gitrev 5f6f343a302d620b0868edab376c00b15741e39e
 %global newlib_cygwin_gitrev 50e2a63b04bdd018484605fbb954fd1bd5147fa0
 %global _unpackaged_files_terminate_build 0
@@ -300,6 +300,7 @@ Patch37: gcc11-pr113960.patch
 Patch38: gcc11-pr105157.patch
 Patch39: gcc11-testsuite-fixes-4.patch
 Patch40: gcc11-pr99888.patch
+Patch41: gcc11-pr118976.patch
 
 Patch100: gcc11-fortran-fdec-duplicates.patch
 Patch101: gcc11-fortran-flogical-as-integer.patch
@@ -905,6 +906,7 @@ mark them as cross compiled.
 %patch38 -p1 -b .pr105157~
 %patch39 -p1 -b .testsuite4~
 %patch40 -p1 -b .pr99888~
+%patch41 -p1 -b .pr118976~
 
 %if 0%{?rhel} >= 9
 %patch100 -p1 -b .fortran-fdec-duplicates~
@@ -3601,6 +3603,9 @@ end
 %endif
 
 %changelog
+* Thu May 29 2025 Joseph Myers <josmyers@redhat.com> - 11.5.0-7
+- Fix folding of BIT_NOT_EXPR for POLY_INT_CST (PR 118976, RHEL-90239)
+
 * Wed May 21 2025 David Malcolm <dmalcolm@redhat.com> - 11.5.0-6
 - rs6000: Rework ELFv2 support for -fpatchable-function-entry (PR target/99888,
   RHEL-75806)

gcc11-pr118976.patch

@@ -0,0 +1,64 @@
+Original patch (taken from GCC 12 branch version) edited for GCC 11 to
+use .c rather than .cc filenames.
+
+commit 587b370c8492aadaab14c57e242c66778cc78891
+Author: Richard Sandiford <richard.sandiford@arm.com>
+Date:   Tue Mar 11 15:51:55 2025 +0000
+
+    Fix folding of BIT_NOT_EXPR for POLY_INT_CST [PR118976]
+    
+    There was an embarrassing typo in the folding of BIT_NOT_EXPR for
+    POLY_INT_CSTs: it used - rather than ~ on the poly_int.  Not sure
+    how that happened, but it might have been due to the way that
+    ~x is implemented as -1 - x internally.
+    
+    gcc/
+            PR tree-optimization/118976
+            * fold-const.cc (const_unop): Use ~ rather than - for BIT_NOT_EXPR.
+            * config/aarch64/aarch64.cc (aarch64_test_sve_folding): New function.
+            (aarch64_run_selftests): Run it.
+    
+    (cherry picked from commit 78380fd7f743e23dfdf013d68a2f0347e1511550)
+
+diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
+index be0d958dcf6b..72d737d62228 100644
+--- a/gcc/config/aarch64/aarch64.c
++++ b/gcc/config/aarch64/aarch64.c
+@@ -27541,6 +27541,16 @@ aarch64_test_fractional_cost ()
+   ASSERT_EQ (cf (1, 2).as_double (), 0.5);
+ }
+ 
++/* Test SVE arithmetic folding.  */
++
++static void
++aarch64_test_sve_folding ()
++{
++  tree res = fold_unary (BIT_NOT_EXPR, ssizetype,
++			 ssize_int (poly_int64 (1, 1)));
++  ASSERT_TRUE (operand_equal_p (res, ssize_int (poly_int64 (-2, -1))));
++}
++
+ /* Run all target-specific selftests.  */
+ 
+ static void
+@@ -27548,6 +27558,7 @@ aarch64_run_selftests (void)
+ {
+   aarch64_test_loading_full_dump ();
+   aarch64_test_fractional_cost ();
++  aarch64_test_sve_folding ();
+ }
+ 
+ } // namespace selftest
+diff --git a/gcc/fold-const.c b/gcc/fold-const.c
+index d81a71c41a17..391f11095408 100644
+--- a/gcc/fold-const.c
++++ b/gcc/fold-const.c
+@@ -1802,7 +1802,7 @@ const_unop (enum tree_code code, tree type, tree arg0)
+       if (TREE_CODE (arg0) == INTEGER_CST)
+ 	return fold_not_const (arg0, type);
+       else if (POLY_INT_CST_P (arg0))
+-	return wide_int_to_tree (type, -poly_int_cst_value (arg0));
++	return wide_int_to_tree (type, ~poly_int_cst_value (arg0));
+       /* Perform BIT_NOT_EXPR on each element individually.  */
+       else if (TREE_CODE (arg0) == VECTOR_CST)
+ 	{