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import gcc-8.5.0-2.el8

This commit is contained in:
CentOS Sources 2021-06-09 04:17:15 +00:00
parent c0417480ff
commit f6bbb1a286
3 changed files with 210 additions and 1 deletions
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137
SOURCES/gcc8-pr100797.patch Normal file
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@ -0,0 +1,137 @@
commit ebfe8b28d40746ff33724bd5b9ade2552e619213
Author: Jason Merrill <jason@redhat.com>
Date: Thu May 27 23:54:52 2021 -0400
c++: 'this' adjustment for devirtualized call
My patch for 95719 made us do a better job of finding the actual virtual
function we want to call, but didn't update the 'this' pointer adjustment to
match.
This backport also incorporates a bit of the r11-1638 reorganization.
PR c++/100797
PR c++/95719
gcc/cp/ChangeLog:
* call.c (build_over_call): Adjust base_binfo in
resolves_to_fixed_type_p case.
gcc/testsuite/ChangeLog:
* g++.dg/inherit/virtual15.C: New test.
* g++.dg/inherit/virtual15a.C: New test.
--- gcc/cp/call.c
+++ gcc/cp/call.c
@@ -8309,19 +8309,6 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
|| CLASSTYPE_FINAL (TYPE_METHOD_BASETYPE (TREE_TYPE (fn))))
flags |= LOOKUP_NONVIRTUAL;
- /* If we know the dynamic type of the object, look up the final overrider
- in the BINFO. */
- if (DECL_VINDEX (fn) && (flags & LOOKUP_NONVIRTUAL) == 0
- && resolves_to_fixed_type_p (arg))
- {
- tree binfo = cand->conversion_path;
- if (BINFO_TYPE (binfo) != DECL_CONTEXT (fn))
- binfo = lookup_base (binfo, DECL_CONTEXT (fn), ba_unique,
- NULL, complain);
- fn = lookup_vfn_in_binfo (DECL_VINDEX (fn), binfo);
- flags |= LOOKUP_NONVIRTUAL;
- }
-
/* [class.mfct.nonstatic]: If a nonstatic member function of a class
X is called for an object that is not of type X, or of a type
derived from X, the behavior is undefined.
@@ -8331,10 +8318,6 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
gcc_assert (TYPE_PTR_P (parmtype));
/* Convert to the base in which the function was declared. */
gcc_assert (cand->conversion_path != NULL_TREE);
- converted_arg = build_base_path (PLUS_EXPR,
- arg,
- cand->conversion_path,
- 1, complain);
/* Check that the base class is accessible. */
if (!accessible_base_p (TREE_TYPE (argtype),
BINFO_TYPE (cand->conversion_path), true))
@@ -8349,10 +8332,33 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
/* If fn was found by a using declaration, the conversion path
will be to the derived class, not the base declaring fn. We
must convert from derived to base. */
- base_binfo = lookup_base (TREE_TYPE (TREE_TYPE (converted_arg)),
+ base_binfo = lookup_base (cand->conversion_path,
TREE_TYPE (parmtype), ba_unique,
NULL, complain);
- converted_arg = build_base_path (PLUS_EXPR, converted_arg,
+
+ /* If we know the dynamic type of the object, look up the final overrider
+ in the BINFO. */
+ if (DECL_VINDEX (fn) && (flags & LOOKUP_NONVIRTUAL) == 0
+ && resolves_to_fixed_type_p (arg))
+ {
+ tree ov = lookup_vfn_in_binfo (DECL_VINDEX (fn), base_binfo);
+
+ /* And unwind base_binfo to match. If we don't find the type we're
+ looking for in BINFO_INHERITANCE_CHAIN, we're looking at diamond
+ inheritance; for now do a normal virtual call in that case. */
+ tree octx = DECL_CONTEXT (ov);
+ tree obinfo = base_binfo;
+ while (obinfo && !SAME_BINFO_TYPE_P (BINFO_TYPE (obinfo), octx))
+ obinfo = BINFO_INHERITANCE_CHAIN (obinfo);
+ if (obinfo)
+ {
+ fn = ov;
+ base_binfo = obinfo;
+ flags |= LOOKUP_NONVIRTUAL;
+ }
+ }
+
+ converted_arg = build_base_path (PLUS_EXPR, arg,
base_binfo, 1, complain);
argarray[j++] = converted_arg;
--- /dev/null
+++ gcc/testsuite/g++.dg/inherit/virtual15.C
@@ -0,0 +1,18 @@
+// PR c++/100797
+// { dg-do run }
+
+bool ok = false;
+struct S1 { virtual ~S1() {} };
+struct S2 { virtual void f1() = 0; };
+struct S3: S1, S2 {
+ void f1() { f2(); }
+ virtual void f2() = 0;
+};
+struct S4: S3 {
+ void f2() { ok = true; }
+ using S2::f1;
+};
+int main() {
+ S4().f1();
+ if (!ok) __builtin_abort ();
+}
--- /dev/null
+++ gcc/testsuite/g++.dg/inherit/virtual15a.C
@@ -0,0 +1,19 @@
+// PR c++/100797 plus diamond inheritance
+// { dg-do run }
+
+bool ok = false;
+struct S1 { virtual ~S1() {} };
+struct S2 { virtual void f1() = 0; };
+struct S3: S1, virtual S2 {
+ void f1() { f2(); }
+ virtual void f2() = 0;
+};
+struct SX: virtual S2 { };
+struct S4: SX, S3 {
+ void f2() { ok = true; }
+ using S2::f1;
+};
+int main() {
+ S4().f1();
+ if (!ok) __builtin_abort ();
+}

64
SOURCES/gcc8-rh1960701.patch Normal file
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@ -0,0 +1,64 @@
--- gcc/cp/call.c
+++ gcc/cp/call.c
@@ -6904,7 +6904,7 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
elttype = cp_build_qualified_type
(elttype, cp_type_quals (elttype) | TYPE_QUAL_CONST);
array = build_array_of_n_type (elttype, len);
- array = finish_compound_literal (array, new_ctor, complain, fcl_c99);
+ array = finish_compound_literal (array, new_ctor, complain);
/* Take the address explicitly rather than via decay_conversion
to avoid the error about taking the address of a temporary. */
array = cp_build_addr_expr (array, complain);
@@ -10984,13 +10984,11 @@ set_up_extended_ref_temp (tree decl, tree expr, vec<tree, va_gc> **cleanups,
lvalue-rvalue conversion applied to "a glvalue of literal type
that refers to a non-volatile temporary object initialized
with a constant expression". Rather than try to communicate
- that this VAR_DECL is a temporary, just mark it constexpr.
-
- Currently this is only useful for initializer_list temporaries,
- since reference vars can't appear in constant expressions. */
+ that this VAR_DECL is a temporary, just mark it constexpr. */
DECL_DECLARED_CONSTEXPR_P (var) = true;
DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (var) = true;
TREE_CONSTANT (var) = true;
+ TREE_READONLY (var) = true;
}
DECL_INITIAL (var) = init;
init = NULL_TREE;
--- gcc/cp/tree.c
+++ gcc/cp/tree.c
@@ -442,6 +442,14 @@ build_target_expr (tree decl, tree value, tsubst_flags_t complain)
|| useless_type_conversion_p (TREE_TYPE (decl),
TREE_TYPE (value)));
+ /* Set TREE_READONLY for optimization, such as gimplify_init_constructor
+ moving a constant aggregate into .rodata. */
+ if (CP_TYPE_CONST_NON_VOLATILE_P (type)
+ && !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
+ && !VOID_TYPE_P (TREE_TYPE (value))
+ && reduced_constant_expression_p (value))
+ TREE_READONLY (decl) = true;
+
if (complain & tf_no_cleanup)
/* The caller is building a new-expr and does not need a cleanup. */
t = NULL_TREE;
--- /dev/null
+++ gcc/testsuite/g++.dg/cpp1y/pr95226.C
@@ -0,0 +1,17 @@
+// PR c++/95226
+// { dg-do run { target c++14 } }
+
+#include <vector>
+
+struct T {
+ unsigned a;
+ float b {8.};
+};
+
+int main()
+{
+ T t = {1};
+ std::vector<T> tt = {{1}, {2}};
+ if (t.a != 1 || t.b != 8.0f || tt[0].a != 1 || tt[0].b != 8.0f || tt[1].a != 2 || tt[1].b != 8.0f)
+ __builtin_abort ();
+}

10
SPECS/gcc.spec
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@ -4,7 +4,7 @@
%global gcc_major 8
# 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 1
%global gcc_release 2
%global nvptx_tools_gitrev c28050f60193b3b95a18866a96f03334e874e78f
%global nvptx_newlib_gitrev aadc8eb0ec43b7cd0dd2dfb484bae63c8b05ef24
%global _unpackaged_files_terminate_build 0
@ -273,6 +273,8 @@ Patch15: gcc8-rh1670535.patch
Patch16: gcc8-libgomp-20190503.patch
Patch17: gcc8-libgomp-testsuite.patch
Patch18: gcc8-remove-old-demangle.patch
Patch19: gcc8-rh1960701.patch
Patch20: gcc8-pr100797.patch
Patch30: gcc8-rh1668903-1.patch
Patch31: gcc8-rh1668903-2.patch
@ -850,6 +852,8 @@ to NVidia PTX capable devices if available.
%patch16 -p0 -b .libgomp-20190503~
%patch17 -p0 -b .libgomp-testsuite~
%patch18 -p0 -b .demangle~
%patch19 -p0 -b .rh1960701~
%patch20 -p0 -b .pr100797~
%patch30 -p0 -b .rh1668903-1~
%patch31 -p0 -b .rh1668903-2~
@ -3166,6 +3170,10 @@ fi
%endif
%changelog
* Tue Jun 1 2021 Marek Polacek <polacek@redhat.com> 8.5.0-2
- revert upstream PR85873 gcc-8 fix, apply the fix from gcc-9 (#1960701)
- fix 'this' adjustment for devirtualized call (PR c++/100797, #1965951)
* Fri May 14 2021 Marek Polacek <polacek@redhat.com> 8.5.0-1
- update from GCC 8.5 release (#1946758)
- this includes a fix for PR target/87839 (#1958295)