Re: [PATCH v4 1/2] Fix __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
On Sep 13, 2014, at 5:48 AM, FX fxcoud...@gmail.com wrote: Updated version, bootstraps and regtests. OK to commit? Ok.
Re: [PATCH] microblaze: microblaze.md: Use 'SI' instead of 'VOID' for operand 1 of 'call_value_intern'
Hello maintainers:
I also find some warnings during compiling microblaze, I also shall try
to fix them, but excuse me, I am not quite familiar the testsuite for
microblaze, could you provide any related information for it?
Thanks.
On 09/08/2014 11:28 PM, Chen Gang wrote:
On 09/08/2014 10:24 AM, Chen Gang wrote:
On 09/07/2014 11:17 PM, Chen Gang wrote:
On 8/13/14 23:10, Michael Eager wrote:
On 07/06/14 03:26, Chen Gang wrote:
* microblaze/mocroblaze.md (call_value_intern): Use 'SI' instead of
'VOID' for operand 1, just like 'call_internal1' has done.
The related warning:
../../gcc/gcc/config/microblaze/microblaze.md:2172: warning: operand
1 missing mode?
Signed-off-by: Chen Gang gang.chen.5...@gmail.com
---
gcc/config/microblaze/microblaze.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/microblaze/microblaze.md
b/gcc/config/microblaze/microblaze.md
index 2bd5d72..9580221 100644
--- a/gcc/config/microblaze/microblaze.md
+++ b/gcc/config/microblaze/microblaze.md
@@ -2171,7 +2171,7 @@
(define_insn call_value_intern
[(set (match_operand:VOID 0 register_operand =d)
-(call (mem (match_operand:VOID 1 call_insn_operand ri))
+(call (mem (match_operand:SI 1 call_insn_operand ri))
(match_operand:SI 2 i)))
(clobber (match_operand:SI 3 register_operand =d))]
This patch causes a test suite regression:
Executing on host: mb-gcc -fno-diagnostics-show-caret
-fdiagnostics-color=never-O0 -w -c -mno-xl-soft-mul
-mxl-barrel-shift -mcpu=v6.00.a -o calls.o
testsuite/gcc.c-torture/compile/calls.c(timeout = 60)
pid is 24832 -24832
testsuite/gcc.c-torture/compile/calls.c: In function 'f1':
testsuite/gcc.c-torture/compile/calls.c:6:1: error: unrecognizable insn:
(call_insn 5 2 8 2 (parallel [
(set (reg:SI 3 r3)
(call (mem:SI (const_int 0 [0]) [0 MEM[(void * (*T29e)
(void))0B] S4 A32])
(const_int 24 [0x18])))
(clobber (reg:SI 15 r15))
]) testsuite/gcc.c-torture/compile/calls.c:5 -1
(nil)
(nil))
testsuite/gcc.c-torture/compile/calls.c:6:1: internal compiler error: in
extract_insn, at recog.c:2204
0x983018 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/store/Xilinx/repo/fsf/gcc/gcc/rtl-error.c:109
0x983041 _fatal_insn_not_found(rtx_def const*, char const*, int, char
const*)
/store/Xilinx/repo/fsf/gcc/gcc/rtl-error.c:117
0x9539cd extract_insn(rtx_def*)
/store/Xilinx/repo/fsf/gcc/gcc/recog.c:2204
0x7a5b59 instantiate_virtual_regs_in_insn
/store/Xilinx/repo/fsf/gcc/gcc/function.c:1561
0x7aaa78 instantiate_virtual_regs
/store/Xilinx/repo/fsf/gcc/gcc/function.c:1932
At present, I guess the original code is correct, need not additional
fix: When call call_insn_operand() in gencog(), related 'rtx' mode is
VOIDmode (which need VOID, not SI).
For the compiler's warning: operand 1 is VOIDmode, after give some
related test, operand 1 is VOIDmode is all OK, the related tests are
below:
- For almost same definitions, they are OK:
- int *(*T)(void);
- char *(*T)(int);
...
- For incorrect assignments, report related correct warning/error:
- char a = ((long long *(*)(short)) 0) (1);
- ((long long *(*)(short)) 0) ();
...
If what I guess is correct, the below issue can be fixed in the same
way, please help check.
typedef void (*T)(void);
f1 ()
{
((T) 0)();
}
Oh, sorry, neither original nor the new one (with this patch) can
recognize the code above.
Need use VOID instead of SI, or when real VOIDmode comes, it does not
match SImode, so cause issue.
The related test code ('void' will cause CALL instead of SET):
typedef void (*T)(void);
f1 ()
{
((T) 0)();
}
The related error:
[root@localhost gcc]# ./cc1 /tmp/calls.c -o /tmp/1.s
f1
Analyzing compilation unit
Performing interprocedural optimizations
*free_lang_data visibility early_local_cleanups
free-inline-summary whole-program inlineAssembling functions:
f1
/tmp/calls.c: In function 'f1':
/tmp/calls.c:5:1: error: unrecognizable insn:
}
^
(call_insn 5 2 8 2 (parallel [
(call (mem:SI (const_int 0 [0]) [0 MEM[(void (*T29c)
(void))0B] S4 A32])
(const_int 24 [0x18]))
(clobber (reg:SI 15 r15))
]) /tmp/calls.c:4 -1
(nil)
(nil))
/tmp/calls.c:5:1: internal compiler error: in extract_insn, at recog.c:2204
0xb0e71b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/gcc/rtl-error.c:109
0xb0e75c _fatal_insn_not_found(rtx_def const*, char const*, int, char
const*)
../../gcc/gcc/rtl-error.c:117
0xac552b extract_insn(rtx_def*)
../../gcc/gcc/recog.c:2204
0x8b919e instantiate_virtual_regs_in_insn
Re: [PATCH v4 1/2] Fix __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
Committed as rev. 215251 Thanks for the review. FX
Re: [Patch] PR 61692 - Fix for inline asm ICE
I sent you the file you requested (off list), but never heard back from you about the valgrind results. In an effort to move this along, I installed ubuntu under virtualbox and did a build of gcc. When running the output of this build with valgrind, I saw a number of memory *leaks* reported, but no overruns, despite having maxed out the operands + clobbers in a variety of ways. I have only tested this on x86, and only with inline asm, but I have had no luck (using code inspection, sprinkling printfs, and now valgrind) locating the error you are expecting to see. Without knowing what is making you quite confident there is a problem, I don't know what else to try. Suggestions? Theoretically I could add the nclobbers in just in case. But unlike adding nlabels, adding nclobbers here will almost certainly break someone's code. I'm not prepared to do that unless there is a clear problem to be fixed, and I'm just not seeing it. If you are also out of ideas, I can re-send the patch for the original ninputs + noutputs + nlabels problem (along with the testcase you requested), and we can at least fix the known ICE. dw On 8/1/2014 11:29 AM, Jeff Law wrote: On 08/01/14 02:07, David Wohlferd wrote: I'd love to. Unfortunately, my platform doesn't support valgrind. Ah. Also, please include the testcase you had nlabels part. I have created the testcase for the 31 labels problem. However, not so much for the nclobbers part. And if I'm going to patch both, I should have testcases for both. Tell you what, pass along what you've got and I'll run it under valgrind here. I'm quite confident both need to be changed -- though it is possible nothing will trigger with the nclobbers stuff if it is indeed handled separately throughout the guts of GCC. Jeff
Re: [C++14] Add is_final type trait.
On 13/09/14 21:58 -0400, Ed Smith-Rowland wrote: We've had __has_final built-in for a good while. the std library component is_final was added to C++14 - which is now good. I noticed while looking at the latest SD-6 draft. So here is a simple patch that builds and passes clean on x86_64-linux. OK? Yes, OK for trunk. Thanks, Ed. I'd be willing to approve a backport to 4.9 as well (changing the test from = 201402L to 201103L) if you wanted to prepare that patch :-)
Re: [PATCHv2] Vimrc config with GNU formatting
On Thu, 11 Sep 2014, Yury Gribov wrote:
Ok, it tooks some time. Basically we want brace symbol to behave differently
in two contexts:
1) not add any additional offset when not following control flow operator:
void
f ()
{
int x;
{
}
}
Note that GCC commonly uses custom iteration macros, e.g.:
FOR_EACH_BB_FN(bb, fn)
{
do_stuff;
}
and cinoptions that get the braces-in-switch case wrong should get constructs
like the above right.
(to get gnu-style autoindent in Vim, I've been using
http://www.vim.org/scripts/script.php?script_id=575 and would adjust braces in
switch by hand if need arose; the script is probably very close to one of
approaches posted in this thread, but I haven't checked)
Alexander
[PATCH] libatomic: Acquire locks in increasing order to avoid deadlocks
libat_lock_n acquires a set of locks from an array of locks. As done now,
locks might be acquired first from the end of the array and then from the
start of the array. Consider the scenario of two threads each trying to
acquire all locks. Thread 1 starts by taking lock 1 and thread 2 starts by
taking lock 0. Since both threads need a lock taken by the other we have
a deadlock. This patch changes the order in which locks are taken so that
it is always increasing. This way at least one thread will always make
progress.
As the cache line size is normally a power of two the div and mod operation
will be compiled to bit operations.
2014-09-14 Daniel Cederman ceder...@gaisler.com
* libatomic/config/posix/lock.c (libat_lock_n): Acquire
locks in increasing order to avoid deadlocks
---
libatomic/config/posix/lock.c | 19 +--
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/libatomic/config/posix/lock.c b/libatomic/config/posix/lock.c
index a214c45..a13830f 100644
--- a/libatomic/config/posix/lock.c
+++ b/libatomic/config/posix/lock.c
@@ -81,19 +81,26 @@ libat_lock_n (void *ptr, size_t n)
{
uintptr_t h = addr_hash (ptr);
size_t i = 0;
+ size_t l;
/* Don't lock more than all the locks we have. */
if (n PAGE_SIZE)
n = PAGE_SIZE;
- do
+ l = n / CACHLINE_SIZE + h;
+
+ if (n % CACHLINE_SIZE)
+l++;
+
+ if (l = NLOCKS)
{
- pthread_mutex_lock (locks[h].mutex);
- if (++h == NLOCKS)
- h = 0;
- i += WATCH_SIZE;
+ for (i=0; i l - NLOCKS; i++)
+pthread_mutex_lock (locks[i].mutex);
+ l = NLOCKS;
}
- while (i n);
+
+ for (i=h; i l; i++)
+pthread_mutex_lock (locks[i].mutex);
}
void
--
2.1.0
[C++14 PATCH] Do not diagnose lambda default arguments in c++14 modes.
Tested on Linux-x64.
/cp
2014-09-14 Ville Voutilainen ville.voutilai...@gmail.com
Do not diagnose lambda default arguments in c++14 modes.
* parser.c (cp_parser_lambda_declarator_opt): Make the pedwarn conditional.
/testsuite
2014-09-14 Ville Voutilainen ville.voutilai...@gmail.com
Do not diagnose lambda default arguments in c++14 modes.
* g++.dg/cpp0x/lambda/lambda-defarg.C: Enable in c++11_only.
* g++.dg/cpp1y/lambda-defarg.C: New.
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index c696fd2..de61eb9 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -9220,7 +9220,7 @@ cp_parser_lambda_declarator_opt (cp_parser* parser, tree lambda_expr)
/* Default arguments shall not be specified in the
parameter-declaration-clause of a lambda-declarator. */
for (tree t = param_list; t; t = TREE_CHAIN (t))
- if (TREE_PURPOSE (t))
+ if (TREE_PURPOSE (t) cxx_dialect cxx14)
pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_Wpedantic,
default argument specified for lambda parameter);
diff --git a/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg.C b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg.C
index cefa24d..11d8170 100644
--- a/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg.C
+++ b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-defarg.C
@@ -1,6 +1,6 @@
-// { dg-do compile { target c++11 } }
+// { dg-do compile { target c++11_only } }
int main()
{
- [](int a = 1) { return a; }(); // { dg-error }
+ [](int a = 1) { return a; }(); // { dg-error default argument }
}
diff --git a/gcc/testsuite/g++.dg/cpp1y/lambda-defarg.C b/gcc/testsuite/g++.dg/cpp1y/lambda-defarg.C
new file mode 100644
index 000..eafbe18
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/lambda-defarg.C
@@ -0,0 +1,6 @@
+// { dg-do compile { target c++14 } }
+
+int main()
+{
+ [](int a = 1) { return a; }();
+}
lambda-defarg-cxx14.changelog
Description: Binary data
Re: [PATCH 5/5] add libcc1 [gcc-5/changes.html]
What happened with this? I don't see any libcc1 in the gcc repository and this patch was never committed. Cheers, Manuel. On 31 August 2014 17:12, Gerald Pfeifer ger...@pfeifer.com wrote: Hi Jan, On Fri, 8 Aug 2014, Jan Kratochvil wrote: Jeff == Jeff Law l...@redhat.com writes: Does this deserve a mention in the news file? Attached (based on Tom's PATCH 0/5 mail). Index: htdocs/gcc-5/changes.html === +h3 id=cC/h3 + ul +liGDB evaluation of a block of source code is now provided by new GCC +plugin.br / How does one obtain/install/trigger this plugin? Where are more details documented? This is information I'd add here. +A user can compile a code snippet and it will be inserted into the inferior +and evaluated. Declarations needed by the snippet are supplied by GDB, and +there is a GDB--GCC interface so that the snippets can refer to local +variables in the current inferior frame. The validator probably is going to complain that this needs to be within p.../p markers. In HTML, I'd just say GDB-GCC (one dash). I'm good with this patch modulo these suggestion, but perhaps Jeff or Tom have some further input? Gerald
[PATCH C++, PING] - SD-6 Implementation Part N/4.
I would like review of my SD-6 implementation. Part 1 - __has_include__ built-in in libcpp. https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00083.html Part 2 - __has_include macro and C++ language feature macros. https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00084.html Part 3 - libstdc++ library macros was already approved by Jonathan. Thank you. https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00085.html https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00110.html Part 4 - C++ front end tests. https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00553.html These build and test cleanly on x86_64-linux. Part 5 - __has_cpp_attribute and supporting machinery is proving more interesting than I thought. But the rest should be put in. Thank you, Ed Smith-Rowland
[C++14 PATCH] Minor cleanup, don't run tests for which compilation is enough.
Tested on Linux-x64.
/testsuite
2014-09-14 Ville Voutilainen ville.voutilai...@gmail.com
Minor cleanup, don't run tests for which compilation is enough.
* g++.dg/g++.dg/cpp1y/var-templ1.C: Change return to
static_assert, compile instead of running.
* g++.dg/g++.dg/cpp1y/var-templ3.C: Likewise.
* g++.dg/g++.dg/cpp1y/var-templ4.C: Likewise.
* g++.dg/g++.dg/cpp1y/var-templ5.C: Likewise.
diff --git a/gcc/testsuite/g++.dg/cpp1y/var-templ1.C
b/gcc/testsuite/g++.dg/cpp1y/var-templ1.C
index 856198a..89b3c8f 100644
--- a/gcc/testsuite/g++.dg/cpp1y/var-templ1.C
+++ b/gcc/testsuite/g++.dg/cpp1y/var-templ1.C
@@ -1,4 +1,4 @@
-// { dg-do run { target c++14 } }
+// { dg-do compile { target c++14 } }
templateint A, int B
struct S1
@@ -12,10 +12,7 @@ templatetypename T
int main ()
{
- int v = varS1199, 23/2;
- return !(
- varS111, 100 == v
- varS150, 120 == varS1150, varS110, 10
- varS153, 23 != 222
- );
+ static_assert(varS111, 100 == varS1199, 23/2
+varS150, 120 == varS1150, varS110, 10
+varS153, 23 != 222, );
}
diff --git a/gcc/testsuite/g++.dg/cpp1y/var-templ3.C
b/gcc/testsuite/g++.dg/cpp1y/var-templ3.C
index 52ef668..254f388 100644
--- a/gcc/testsuite/g++.dg/cpp1y/var-templ3.C
+++ b/gcc/testsuite/g++.dg/cpp1y/var-templ3.C
@@ -1,4 +1,4 @@
-// { dg-do run { target c++14 } }
+// { dg-do compile { target c++14 } }
templatetypename T
constexpr int var = sizeof (T);
@@ -12,7 +12,5 @@ templatetypename T
int main ()
{
- return !(
-varint + varchar == S1int::achar
- );
+ static_assert(varint + varchar == S1int::achar, );
}
diff --git a/gcc/testsuite/g++.dg/cpp1y/var-templ4.C
b/gcc/testsuite/g++.dg/cpp1y/var-templ4.C
index 4ad7be6..3cd84a8 100644
--- a/gcc/testsuite/g++.dg/cpp1y/var-templ4.C
+++ b/gcc/testsuite/g++.dg/cpp1y/var-templ4.C
@@ -1,4 +1,4 @@
-// { dg-do run { target c++14 } }
+// { dg-do compile { target c++14 } }
templatetypename T
constexpr int var = sizeof (T);
@@ -8,8 +8,5 @@ template
int main ()
{
- return !(
- varint == 10
- varchar == sizeof(char)
- );
+ static_assert(varint == 10 varchar == sizeof(char), );
}
diff --git a/gcc/testsuite/g++.dg/cpp1y/var-templ5.C
b/gcc/testsuite/g++.dg/cpp1y/var-templ5.C
index a10f388..a8bc7f6 100644
--- a/gcc/testsuite/g++.dg/cpp1y/var-templ5.C
+++ b/gcc/testsuite/g++.dg/cpp1y/var-templ5.C
@@ -1,4 +1,4 @@
-// { dg-do run { target c++14 } }
+// { dg-do compile { target c++14 } }
templateint A, int B
struct S1
@@ -15,7 +15,5 @@ templatetemplateint,int class T, int A
int main ()
{
- return !(
-var2S1, 40 == 120
- );
+ static_assert(var2S1, 40 == 120, );
}
var-templ-test-cleanup.changelog
Description: Binary data
[PATCH 1/2] Add an no_reorder attribute for LTO
From: Andi Kleen a...@linux.intel.com
Some projects need to prevent reordering of specific top level
declarations with LTO, in particular declarations defining init calls.
The only way to do that with LTO was to use -fno-toplevel-reorder,
which stops reordering for all declarations and makes LTO partitioning
less efficient.
This patch adds a new no_reorder attribute that stops reordering only
for the marked declaration. The program can then only mark e.g. the
initcalls and leave all the other declarations alone.
The patch does:
- Adds the new no_reorder attribute for the C family.
- Initializes a new no_reorder flag in the symtab_nodes in the
function visibility flag.
- Maintains the no_reorder flag when creating new nodes.
- Changes the partition code to always keep a separate
sorted queue of ordered nodes and flush them in order with the other
nodes. This is used by all nodes with -fno-toplevel-reorder,
and only the marked ones without it.
Parts of the old -fno-toplevel-reorder code paths are reused.
- Adds various checks throughout the tree to make no_reorder
marked functions behave the same as with -fno-toplevel-reorder
- Changes the LTO streamer to serialize the no_reorder attribute.
Bootstrapped and tested with LTO + -fno-toplevel-reorder, plain LTO
and bootstrap w/o LTO on x86_64-linux. Also fixes the reordering in
the other large project.
gcc/c-family/:
2014-09-14 Andi Kleen a...@linux.intel.com
* c-common.c (handle_no_reorder_attribute): New function.
(c_common_attribute_table): Add no_reorder attribute.
gcc/:
2014-09-14 Andi Kleen a...@linux.intel.com
* cgraph.h (symtab_node): Add no_reorder attribute.
* cgraphclones.c (cgraph_node::create_clone): Copy no_reorder.
(cgraph_node::create_version_clone): Dito.
* trans-mem.c (ipa_tm_create_version_alias): Dito.
* cgraphunit.c (varpool_node::finalize_decl): Check no_reorder.
(output_in_order): Add no_reorder flag. Only handle no_reorder
nodes when set.
(symbol_table::compile): Add separate pass for no_reorder nodes.
* doc/extend.texi (no_reorder): Document no_reorder attribute.
* ipa-visibility.c (function_and_variable_visibility): Set
no_reorder flag in symtab_node from declaration.
* lto-cgraph.c (lto_output_node): Serialize no_reorder.
(lto_output_varpool_node): Dito.
(input_overwrite_node): Dito.
(input_varpool_node): Dito.
* varpool.c (varpool_node::add): Set no_reorder attribute.
(symbol_table::remove_unreferenced_decls): Handle no_reorder.
(symbol_table::output_variables): Dito.
* symtab.c (symtab_node::dump_base): Print no_reorder.
gcc/lto/:
2014-09-13 Andi Kleen a...@linux.intel.com
* lto-partition.c (node_cmp): Update comment.
(varpool_node_cmp): Use symtab_node for comparison.
(add_sorted_nodes): New function.
(lto_balanced_map): Change to keep ordered queue
of ordered node. Handle no_reorder attribute.
---
gcc/c-family/c-common.c | 17
gcc/cgraph.h| 2 +
gcc/cgraphclones.c | 2 +
gcc/cgraphunit.c| 36 ++--
gcc/doc/extend.texi | 9 +++-
gcc/ipa-visibility.c| 6 +++
gcc/lto-cgraph.c| 4 ++
gcc/lto/lto-partition.c | 112 ++--
gcc/symtab.c| 2 +
gcc/trans-mem.c | 1 +
gcc/varpool.c | 21 +++--
11 files changed, 153 insertions(+), 59 deletions(-)
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 39be956..74bda6b 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -328,6 +328,8 @@ static tree handle_used_attribute (tree *, tree, tree, int,
bool *);
static tree handle_unused_attribute (tree *, tree, tree, int, bool *);
static tree handle_externally_visible_attribute (tree *, tree, tree, int,
bool *);
+static tree handle_no_reorder_attribute (tree *, tree, tree, int,
+bool *);
static tree handle_const_attribute (tree *, tree, tree, int, bool *);
static tree handle_transparent_union_attribute (tree *, tree, tree,
int, bool *);
@@ -652,6 +654,8 @@ const struct attribute_spec c_common_attribute_table[] =
handle_unused_attribute, false },
{ externally_visible, 0, 0, true, false, false,
handle_externally_visible_attribute, false },
+ { no_reorder,0, 0, true, false, false,
+ handle_no_reorder_attribute, false },
/* The same comments as for noreturn attributes apply to const ones. */
{ const, 0, 0, true, false, false,
handle_const_attribute, false },
@@ -6953,6 +6957,19 @@ handle_externally_visible_attribute (tree *pnode, tree
[PATCH 2/2] Add test cases for noreorder
From: Andi Kleen a...@linux.intel.com
Add some simple test cases for noreorder behaving like
-fno-toplevel-reorder and -fno-toplevel-reorder still working.
Unfortunately there's no easy way to check for output order in DG,
so we just check for existence.
gcc/testsuite/:
2014-09-14 Andi Kleen a...@linux.intel.com
* gcc.dg/noreorder.c: New test.
* gcc.dg/noreorder2.c: New test.
* gcc.dg/noreorder3.c: New test.
---
gcc/testsuite/gcc.dg/noreorder.c | 24
gcc/testsuite/gcc.dg/noreorder2.c | 11 +++
gcc/testsuite/gcc.dg/noreorder3.c | 10 ++
3 files changed, 45 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/noreorder.c
create mode 100644 gcc/testsuite/gcc.dg/noreorder2.c
create mode 100644 gcc/testsuite/gcc.dg/noreorder3.c
diff --git a/gcc/testsuite/gcc.dg/noreorder.c b/gcc/testsuite/gcc.dg/noreorder.c
new file mode 100644
index 000..1559465
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/noreorder.c
@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+/* { dg-options -O2 } */
+
+extern void f2(int);
+
+__attribute__((no_reorder, noinline)) static int foobar(void)
+{
+ f2(1);
+}
+
+static int barbar(void)
+{
+ f2(2);
+}
+
+int bozo(void)
+{
+ f2(3);
+ foobar();
+}
+
+/* { dg-final { scan-assembler foobar } } */
+/* { dg-final { scan-assembler bozo } } */
+/* { dg-final { scan-assembler-not barbar } } */
diff --git a/gcc/testsuite/gcc.dg/noreorder2.c
b/gcc/testsuite/gcc.dg/noreorder2.c
new file mode 100644
index 000..558361b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/noreorder2.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options -O2 -fno-toplevel-reorder } */
+
+__attribute__((no_reorder)) int foobar;
+
+static int barbar;
+int bozo;
+
+/* { dg-final { scan-assembler foobar } } */
+/* { dg-final { scan-assembler bozo } } */
+/* { dg-final { scan-assembler barbar } } */
diff --git a/gcc/testsuite/gcc.dg/noreorder3.c
b/gcc/testsuite/gcc.dg/noreorder3.c
new file mode 100644
index 000..a0b637f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/noreorder3.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options -O2 } */
+
+__attribute__((no_reorder)) int foobar;
+static int barbar;
+int bozo;
+
+/* { dg-final { scan-assembler foobar } } */
+/* { dg-final { scan-assembler bozo } } */
+/* { dg-final { scan-assembler-not barbar } } */
--
2.1.0
Re: [C++14 PATCH] Minor cleanup, don't run tests for which compilation is enough.
Hi, On 09/14/2014 07:44 PM, Ville Voutilainen wrote: Tested on Linux-x64. Thanks. In such cases you can as well remove the main: then is also immediately obvious the the testcase is a dg-do compile. Paolo.
Re: [PATCH 2/2] Add test cases for noreorder
On Sep 14, 2014, at 10:51 AM, Andi Kleen a...@firstfloor.org wrote:
From: Andi Kleen a...@linux.intel.com
Add some simple test cases for noreorder behaving like
-fno-toplevel-reorder and -fno-toplevel-reorder still working.
Unfortunately there's no easy way to check for output order in DG,
so we just check for existence.
I thought some of these would span lines…. foo.*bar could check foo on a line
before bar?
/* { dg-final { scan-assembler section.*foo } } */
int foo (int a)
{
static const int ar[] = { l1 - l1, l2 - l1 };
void *p = l1 + ar[a];
goto *p;
l1:
return 1;
l2:
return 2;
}
Yup, works just fine. Some might say it isn’t a feature, but we have no plans
to fix it.
Re: [C++14 PATCH] Minor cleanup, don't run tests for which compilation is enough.
On 14 September 2014 21:36, Paolo Carlini paolo.carl...@oracle.com wrote: Hi, On 09/14/2014 07:44 PM, Ville Voutilainen wrote: Tested on Linux-x64. Thanks. In such cases you can as well remove the main: then is also immediately obvious the the testcase is a dg-do compile. Sure, but sometimes I use such test snippets as starting points for something more elaborate that gets actually run, it saves time having a main already there even if the test itself doesn't use it. ;)
Re: [PATCH v2] Use sscanf instead of atoll in gcov-tool.c
On 8-Sep-14, at 5:21 AM, Richard Biener wrote: On Sun, Sep 7, 2014 at 7:36 PM, John David Anglin dave.ang...@bell.net wrote: The attached patch fixes bootstrap on hpux which doesn't have the atoll function. Tested on hppa2.0w-hp-hpux11.11 and hppa64-hp-hpux11.11. OK for trunk? ll is not portable (it's GNU), I think BSD uses q and windows may use sth else. I think the code shouldn't use 'long long' but int64_t and the appropriate SCNd64 macros for the sscanf format specifier. Attached is an updated version using the SCNd64 macro. It works fine on hpux. The PRI/SCN macrocs are available back to at least hpux10.20. The other alternative is to use the atoll implementation in read-rtl.c. Tested on hppa2.0w-hp-hpux11.11 and hppa64-hp-hpux11.11. OK for trunk? Dave -- John David Anglin dave.ang...@bell.net 2014-09-14 John David Anglin dang...@gcc.gnu.org PR gcov-profile/61790 * gcov-tool.c (do_rewrite): Change normalize_val to int64_t. Use sscanf instead of atoll. Index: gcov-tool.c === --- gcov-tool.c (revision 215242) +++ gcov-tool.c (working copy) @@ -288,7 +288,7 @@ int opt; int ret; const char *output_dir = 0; - long long normalize_val = 0; + int64_t normalize_val = 0; float scale = 0.0; int numerator = 1; int denominator = 1; @@ -308,7 +308,7 @@ break; case 'n': if (!do_scaling) -normalize_val = atoll (optarg); +sscanf (optarg, % SCNd64, normalize_val); else fnotice (stderr, scaling cannot co-exist with normalization, skipping\n);
Re: [PATCH 1/2] Add an no_reorder attribute for LTO
From: Andi Kleen a...@linux.intel.com
Some projects need to prevent reordering of specific top level
declarations with LTO, in particular declarations defining init calls.
Thanks for working on it!
The only way to do that with LTO was to use -fno-toplevel-reorder,
which stops reordering for all declarations and makes LTO partitioning
less efficient.
Yep, -fno-toplevel-reorder also disables some optimizations (as unreachable
function removal)
This patch adds a new no_reorder attribute that stops reordering only
for the marked declaration. The program can then only mark e.g. the
initcalls and leave all the other declarations alone.
The patch does:
- Adds the new no_reorder attribute for the C family.
- Initializes a new no_reorder flag in the symtab_nodes in the
function visibility flag.
- Maintains the no_reorder flag when creating new nodes.
- Changes the partition code to always keep a separate
sorted queue of ordered nodes and flush them in order with the other
nodes. This is used by all nodes with -fno-toplevel-reorder,
and only the marked ones without it.
Parts of the old -fno-toplevel-reorder code paths are reused.
- Adds various checks throughout the tree to make no_reorder
marked functions behave the same as with -fno-toplevel-reorder
- Changes the LTO streamer to serialize the no_reorder attribute.
Bootstrapped and tested with LTO + -fno-toplevel-reorder, plain LTO
and bootstrap w/o LTO on x86_64-linux. Also fixes the reordering in
the other large project.
gcc/c-family/:
2014-09-14 Andi Kleen a...@linux.intel.com
* c-common.c (handle_no_reorder_attribute): New function.
(c_common_attribute_table): Add no_reorder attribute.
gcc/:
2014-09-14 Andi Kleen a...@linux.intel.com
* cgraph.h (symtab_node): Add no_reorder attribute.
* cgraphclones.c (cgraph_node::create_clone): Copy no_reorder.
(cgraph_node::create_version_clone): Dito.
* trans-mem.c (ipa_tm_create_version_alias): Dito.
* cgraphunit.c (varpool_node::finalize_decl): Check no_reorder.
(output_in_order): Add no_reorder flag. Only handle no_reorder
nodes when set.
(symbol_table::compile): Add separate pass for no_reorder nodes.
* doc/extend.texi (no_reorder): Document no_reorder attribute.
* ipa-visibility.c (function_and_variable_visibility): Set
no_reorder flag in symtab_node from declaration.
* lto-cgraph.c (lto_output_node): Serialize no_reorder.
(lto_output_varpool_node): Dito.
(input_overwrite_node): Dito.
(input_varpool_node): Dito.
* varpool.c (varpool_node::add): Set no_reorder attribute.
(symbol_table::remove_unreferenced_decls): Handle no_reorder.
(symbol_table::output_variables): Dito.
* symtab.c (symtab_node::dump_base): Print no_reorder.
gcc/lto/:
2014-09-13 Andi Kleen a...@linux.intel.com
* lto-partition.c (node_cmp): Update comment.
(varpool_node_cmp): Use symtab_node for comparison.
(add_sorted_nodes): New function.
(lto_balanced_map): Change to keep ordered queue
of ordered node. Handle no_reorder attribute.
---
gcc/c-family/c-common.c | 17
gcc/cgraph.h| 2 +
gcc/cgraphclones.c | 2 +
gcc/cgraphunit.c| 36 ++--
gcc/doc/extend.texi | 9 +++-
gcc/ipa-visibility.c| 6 +++
gcc/lto-cgraph.c| 4 ++
gcc/lto/lto-partition.c | 112
++--
gcc/symtab.c| 2 +
gcc/trans-mem.c | 1 +
gcc/varpool.c | 21 +++--
11 files changed, 153 insertions(+), 59 deletions(-)
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 39be956..74bda6b 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -328,6 +328,8 @@ static tree handle_used_attribute (tree *, tree, tree,
int, bool *);
static tree handle_unused_attribute (tree *, tree, tree, int, bool *);
static tree handle_externally_visible_attribute (tree *, tree, tree, int,
bool *);
+static tree handle_no_reorder_attribute (tree *, tree, tree, int,
+ bool *);
static tree handle_const_attribute (tree *, tree, tree, int, bool *);
static tree handle_transparent_union_attribute (tree *, tree, tree,
int, bool *);
@@ -652,6 +654,8 @@ const struct attribute_spec c_common_attribute_table[] =
handle_unused_attribute, false },
{ externally_visible, 0, 0, true, false, false,
handle_externally_visible_attribute, false },
+ { no_reorder, 0, 0, true, false, false,
+ handle_no_reorder_attribute, false },
/* The same comments as for noreturn attributes apply to const ones. */
{ const,
Re: [PATCH 1/2] Add an no_reorder attribute for LTO
Yep, -fno-toplevel-reorder also ldisables some optimizations (as unreachable
function removal)
Actually it seemed like in my tests it only disables unreachable
variable removal. Might have been wrong though.
/* Set when function is visible by other units. */
unsigned externally_visible : 1;
+ /* Don't reorder to other symbols having this set. */
+ unsigned no_reorder : 1;
Is it necessary to introduce extra bit for this? It is quite rarely chcecked
property, what it buys over lookup_attribute calls everywhere?
There are quite a few FOR_EACH_FUNCTION/VAR loops that check it now.
So I thought about m*n cost, m:symbols, n*number of attributes per sym.
But perhaps that was premature optimization.
Also one idea was to eventually set it implicitly for the flag,
this would allow -fno-toplevel-reorder per individual file in LTO
and also eliminate some special cases. Ok but I suppose this could
somehow add implicit attributes.
--- a/gcc/cgraphclones.c
+++ b/gcc/cgraphclones.c
@@ -437,6 +437,7 @@ cgraph_node::create_clone (tree decl, gcov_type
gcov_count, int freq,
new_node-definition = definition;
new_node-local = local;
new_node-externally_visible = false;
+ new_node-no_reorder = no_reorder;
In kernel case I suppose you don't need to stick no-reorder flag on clones?
If we produce static clone, in what case keeping noreorderness help?
For kernel no_reorder is only ever set on variables (initcalls)
This makes no-reorder variables unremovable by unreachable function/variable
removal.
This is not documented so in extend.texi and moreover perhaps we do not want
this,
as user can use no_reorder used attribute in that case?
It was like this before, so if the flag is set implicitely it will be
convenient to use the same semantics. But I suppose implicit setting
can also add attribute used (although that may change some warnings)
My tests also relied on it (but with Mike's trick that can be fixed)
Given all this do you still want the flag to be removed?
else
{
output_asm_statements ();
expand_all_functions ();
output_variables ();
+ output_in_order (true);
I would expect output_in_order to come first and perhaps replace
output_asm_statements
(so relative order of asm statements and output in order stuff is preserved)
good point.
int current_order = -1;
+ int noreorder_pos = 0;
FOR_EACH_VARIABLE (vnode)
gcc_assert (!vnode-aux);
Hmm, why this is not a simple pass over the nodes array that goes first and
inserts all noreorder
symbols into the first partition before the actual balancing starts?
I guess I was more ambitious. interleaving is also better if we start
setting the flag implicitly, so the partioning with
-fno-toplevel-reorder would behave like before.
-andi
Re: [PATCH] doc/install.texi: add documentation for --disable-libsanitizer
On Wed, 10 Sep 2014, Markus Trippelsdorf wrote: 2014-09-10 Markus Trippelsdorf mar...@trippelsdorf.de * doc/install.texi (Options specification): add --disable-libsanitizer item. Looks good to me, thanks. Gerald
Re: [patch i386]: Sibcall tail-call improvement and partial fix PR/60104
On May 22, 2014, at 2:01 PM, Kai Tietz kti...@redhat.com wrote:
This patch adds a small improvement about sibling tail-calls.
So, I was hoping that you would weigh or fix the damage (PR61387) this does on
darwin.
Here is a patch that fixes it.
Index: config/i386/i386.c
===
--- config/i386/i386.c (revision 215252)
+++ config/i386/i386.c (working copy)
@@ -38968,9 +38968,12 @@ x86_output_mi_thunk (FILE *file, tree, H
{
if (sibcall_insn_operand (fnaddr, word_mode))
{
- tmp = gen_rtx_CALL (VOIDmode, fnaddr, const0_rtx);
- tmp = emit_call_insn (tmp);
- SIBLING_CALL_P (tmp) = 1;
+ fnaddr = XEXP (DECL_RTL (function), 0);
+ tmp = gen_rtx_MEM (QImode, fnaddr);
+ tmp = gen_rtx_CALL (VOIDmode, tmp, const0_rtx);
+ tmp = emit_call_insn (tmp);
+ SIBLING_CALL_P (tmp) = 1;
+ SIBLING_CALL_P (tmp) = 1;
}
else
emit_jump_insn (gen_indirect_jump (fnaddr));
Ok?
Re: [PATCH 1/2] Add an no_reorder attribute for LTO
Yep, -fno-toplevel-reorder also ldisables some optimizations (as unreachable
function removal)
Actually it seemed like in my tests it only disables unreachable
variable removal. Might have been wrong though.
/* Set when function is visible by other units. */
unsigned externally_visible : 1;
+ /* Don't reorder to other symbols having this set. */
+ unsigned no_reorder : 1;
Is it necessary to introduce extra bit for this? It is quite rarely chcecked
property, what it buys over lookup_attribute calls everywhere?
There are quite a few FOR_EACH_FUNCTION/VAR loops that check it now.
So I thought about m*n cost, m:symbols, n*number of attributes per sym.
But perhaps that was premature optimization.
Also one idea was to eventually set it implicitly for the flag,
this would allow -fno-toplevel-reorder per individual file in LTO
and also eliminate some special cases. Ok but I suppose this could
somehow add implicit attributes.
Hmm, that looks like a good argument - adding the attribute to every single
declaration would be wasteful. Lets go with a flag then.
--- a/gcc/cgraphclones.c
+++ b/gcc/cgraphclones.c
@@ -437,6 +437,7 @@ cgraph_node::create_clone (tree decl, gcov_type
gcov_count, int freq,
new_node-definition = definition;
new_node-local = local;
new_node-externally_visible = false;
+ new_node-no_reorder = no_reorder;
In kernel case I suppose you don't need to stick no-reorder flag on clones?
If we produce static clone, in what case keeping noreorderness help?
For kernel no_reorder is only ever set on variables (initcalls)
This makes no-reorder variables unremovable by unreachable
function/variable removal.
This is not documented so in extend.texi and moreover perhaps we do not
want this,
as user can use no_reorder used attribute in that case?
It was like this before, so if the flag is set implicitely it will be
convenient to use the same semantics. But I suppose implicit setting
can also add attribute used (although that may change some warnings)
-fno-toplevel-reorder was done this way to immitate as closely as possible
the non-unit-at-a-time mode so legacy codebases do not break. I guess
-fno-topelvel-reorder can just imply no_reorder and used attribute.
I still think it would be better tomake no_reorder to do only what name
suggests.
My tests also relied on it (but with Mike's trick that can be fixed)
Given all this do you still want the flag to be removed?
No, I guess it can stay.
else
{
output_asm_statements ();
expand_all_functions ();
output_variables ();
+ output_in_order (true);
I would expect output_in_order to come first and perhaps replace
output_asm_statements
(so relative order of asm statements and output in order stuff is preserved)
good point.
int current_order = -1;
+ int noreorder_pos = 0;
FOR_EACH_VARIABLE (vnode)
gcc_assert (!vnode-aux);
Hmm, why this is not a simple pass over the nodes array that goes first and
inserts all noreorder
symbols into the first partition before the actual balancing starts?
I guess I was more ambitious. interleaving is also better if we start
setting the flag implicitly, so the partioning with
-fno-toplevel-reorder would behave like before.
I see, you want to mix toplevel/non-toplevel across partitions. In that case
we also
need to disable logic sorting partitions by size if no_reorder BBs exists in
more than
one partition.
I guess this makes sense, I will look more into your implementation.
Honza
-andi
Re: [patch i386]: Sibcall tail-call improvement and partial fix PR/60104
On Sun, Sep 14, 2014 at 02:38:45PM -0700, Mike Stump wrote: + SIBLING_CALL_P (tmp) = 1; + SIBLING_CALL_P (tmp) = 1; The second time is to make sure? :-) Segher
Re: [PATCH 1/2] Add an no_reorder attribute for LTO
I see, you want to mix toplevel/non-toplevel across partitions. In that case we also need to disable logic sorting partitions by size if no_reorder BBs exists in more than one partition. Isn't that already broken then with -fno-toplevel-reorder? It already puts ordered nodes into different partitions, unless i'm missing something. -Andi
Re: [PATCH] microblaze: microblaze.md: Use 'SI' instead of 'VOID' for operand 1 of 'call_value_intern'
On 09/14/14 00:51, Chen Gang wrote: Hello maintainers: I also find some warnings during compiling microblaze, I also shall try to fix them, but excuse me, I am not quite familiar the testsuite for microblaze, could you provide any related information for it? Hi Chen -- This is the gcc DejaGNU test suite. You can find info about DejaGNU at http://www.gnu.org/software/dejagnu. There is also info about testing GCC here: https://gcc.gnu.org/wiki/Testing_GCC Rather than the standard make check-gcc described on the wiki page and elsewhere, I use a script which sets some configuration options and executes runtest directly. This uses a MicroBlaze processor simulator called vpexec which was included with an older version of Xilinx's EDK. Xilinx no longer supports vpexec. You can use a hardware target board to test microblaze-gcc, or a different simulator such as QEMU. -- Michael Eagerea...@eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
Fix pr61848, linux kernel miscompile
This patch cures the linux kernel boot failure when compiled using
trunk gcc. (Andrew, apologies for hijacking your bugzilla, I started
work on this before finding the bugzilla..)
At its heart, the problem is caused by merge_decls merging from the
old decl to the new decl, then copying back to the old decl and
discarding the new. When Jan moved some fields to the symtab,
copying back to the old decl was lost for those fields. Really,
it would be best if merge_decls was rewritten to merge everything to
the kept decl, but here I'm just doing that for fields accessed via
decl_with_vis.symtab_node.
I also make a few other fixes
1) Trunk does not honour the last section attribute.
extern char foo;
char foo __attribute__ ((__section__(.machine)));
char foo __attribute__ ((__section__(.mymachine)));
results in a section of .machine for foo, rather than
.mymachine, the result for previous compilers back to 2.95 and
possibly beyond.
1b) The comment about issuing an error if the sections conflict
being done later in decl_attributes is seriously out of date.
decl_attributes is called earlier on a fresh decl, so no error is
issued (which I think makes the code in handle_section_attribute
issuing this error, dead). It's been that way since at least 2.95.
2) TLS model attributes have never been merged as far as I can tell,
except for #pragma omp threadprivate variables. I think
extern int __thread x;
int __thread x __attribute__ ((__tls_model__(local-exec)));
ought to result in a local-exec x rather than a default model
x, but see the isn't quite correct comment below. Fixing that
will, I think, require changing enum tls_model to make
TLS_MODEL_REAL different to TLS_MODEL_GLOBAL_DYNAMIC (which will
also fix the mismatch between enum tls_model and tls_model_names[]).
3) The patch hunks below in cp/decl.c that just s/olddecl/newdecl/
are to fix if (TREE_CODE (newdecl) == FUNCTION_DECL) ...
else switch (TREE_CODE (olddecl)) which looks horrible to me.
It's really just cosmetic since we know
TREE_CODE (newdecl) == TREE_CODE (olddecl) at this point.
Bootstrapped and regression tested x86_64-linux. OK to apply?
gcc/c/
PR middle-end/61848
* c-decl.c (merge_decls): Don't merge section name or tls model
to newdecl symtab node, instead merge to olddecl. Override
existing olddecl section name. Set tls_model for all thread-local
vars, not just OMP thread-private ones. Remove incorrect comment.
gcc/cp/
PR middle-end/61848
* decl.c (merge_decls): Don't merge section name, comdat group or
tls model to newdecl symtab node, instead merge to olddecl.
Override existing olddecl section name. Set tls_model for all
thread-local vars, not just OMP thread-private ones. Remove
incorrect comment.
Index: gcc/c/c-decl.c
===
--- gcc/c/c-decl.c (revision 215233)
+++ gcc/c/c-decl.c (working copy)
@@ -2292,22 +2292,10 @@ merge_decls (tree newdecl, tree olddecl, tree newt
/* Merge the threadprivate attribute. */
if (TREE_CODE (olddecl) == VAR_DECL C_DECL_THREADPRIVATE_P (olddecl))
-{
- set_decl_tls_model (newdecl, DECL_TLS_MODEL (olddecl));
- C_DECL_THREADPRIVATE_P (newdecl) = 1;
-}
+C_DECL_THREADPRIVATE_P (newdecl) = 1;
if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS))
{
- /* Merge the section attribute.
-We want to issue an error if the sections conflict but that
-must be done later in decl_attributes since we are called
-before attributes are assigned. */
- if ((DECL_EXTERNAL (olddecl) || TREE_PUBLIC (olddecl) || TREE_STATIC
(olddecl))
- DECL_SECTION_NAME (newdecl) == NULL
- DECL_SECTION_NAME (olddecl))
- set_decl_section_name (newdecl, DECL_SECTION_NAME (olddecl));
-
/* Copy the assembler name.
Currently, it can only be defined in the prototype. */
COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
@@ -2517,6 +2505,20 @@ merge_decls (tree newdecl, tree olddecl, tree newt
(char *) newdecl + sizeof (struct tree_decl_common),
tree_code_size (TREE_CODE (olddecl)) - sizeof (struct
tree_decl_common));
olddecl-decl_with_vis.symtab_node = snode;
+
+ if ((DECL_EXTERNAL (olddecl)
+ || TREE_PUBLIC (olddecl)
+ || TREE_STATIC (olddecl))
+ DECL_SECTION_NAME (newdecl) != NULL)
+ set_decl_section_name (olddecl, DECL_SECTION_NAME (newdecl));
+
+ /* This isn't quite correct for something like
+ int __thread x attribute ((tls_model (local-exec)));
+ extern int __thread x;
+as we'll lose the local-exec model. */
+ if (TREE_CODE (olddecl) == VAR_DECL
+ DECL_THREAD_LOCAL_P
Re: [PATCH] microblaze: microblaze.md: Use 'SI' instead of 'VOID' for operand 1 of 'call_value_intern'
On 9/15/14 11:03, Michael Eager wrote: On 09/14/14 00:51, Chen Gang wrote: Hello maintainers: I also find some warnings during compiling microblaze, I also shall try to fix them, but excuse me, I am not quite familiar the testsuite for microblaze, could you provide any related information for it? Hi Chen -- This is the gcc DejaGNU test suite. You can find info about DejaGNU at http://www.gnu.org/software/dejagnu. There is also info about testing GCC here: https://gcc.gnu.org/wiki/Testing_GCC OK, thanks. I finished about x86_64 testsuite, and also tried microblaze testsuite under x86_64 machine, but failed. Do I need any additional information for microblaze testsuite? Rather than the standard make check-gcc described on the wiki page and elsewhere, I use a script which sets some configuration options and executes runtest directly. This uses a MicroBlaze processor simulator called vpexec which was included with an older version of Xilinx's EDK. Xilinx no longer supports vpexec. You can use a hardware target board to test microblaze-gcc, or a different simulator such as QEMU. OK, thanks, I shall try Qemu (it is the additional chance for me to familiar with Qemu). And do you mean I need try testsuite under the related microblaze host ( e.g. Qemu microblaze simulator)? After finish environments construction, I shall also try to test a patch for ((void (*)(void)) 0)() fixing. Thanks. -- Chen Gang Open, share, and attitude like air, water, and life which God blessed
Re: Fix pr61848, linux kernel miscompile
On Sun, Sep 14, 2014 at 9:02 PM, Alan Modra amo...@gmail.com wrote:
This patch cures the linux kernel boot failure when compiled using
trunk gcc. (Andrew, apologies for hijacking your bugzilla, I started
work on this before finding the bugzilla..)
It is ok that you took over as it looks like you have a more complete
patch than I had.
Does it make sense to add a few testcases for the section attribute too?
Thanks,
Andrew Pinski
At its heart, the problem is caused by merge_decls merging from the
old decl to the new decl, then copying back to the old decl and
discarding the new. When Jan moved some fields to the symtab,
copying back to the old decl was lost for those fields. Really,
it would be best if merge_decls was rewritten to merge everything to
the kept decl, but here I'm just doing that for fields accessed via
decl_with_vis.symtab_node.
I also make a few other fixes
1) Trunk does not honour the last section attribute.
extern char foo;
char foo __attribute__ ((__section__(.machine)));
char foo __attribute__ ((__section__(.mymachine)));
results in a section of .machine for foo, rather than
.mymachine, the result for previous compilers back to 2.95 and
possibly beyond.
1b) The comment about issuing an error if the sections conflict
being done later in decl_attributes is seriously out of date.
decl_attributes is called earlier on a fresh decl, so no error is
issued (which I think makes the code in handle_section_attribute
issuing this error, dead). It's been that way since at least 2.95.
2) TLS model attributes have never been merged as far as I can tell,
except for #pragma omp threadprivate variables. I think
extern int __thread x;
int __thread x __attribute__ ((__tls_model__(local-exec)));
ought to result in a local-exec x rather than a default model
x, but see the isn't quite correct comment below. Fixing that
will, I think, require changing enum tls_model to make
TLS_MODEL_REAL different to TLS_MODEL_GLOBAL_DYNAMIC (which will
also fix the mismatch between enum tls_model and tls_model_names[]).
3) The patch hunks below in cp/decl.c that just s/olddecl/newdecl/
are to fix if (TREE_CODE (newdecl) == FUNCTION_DECL) ...
else switch (TREE_CODE (olddecl)) which looks horrible to me.
It's really just cosmetic since we know
TREE_CODE (newdecl) == TREE_CODE (olddecl) at this point.
Bootstrapped and regression tested x86_64-linux. OK to apply?
gcc/c/
PR middle-end/61848
* c-decl.c (merge_decls): Don't merge section name or tls model
to newdecl symtab node, instead merge to olddecl. Override
existing olddecl section name. Set tls_model for all thread-local
vars, not just OMP thread-private ones. Remove incorrect comment.
gcc/cp/
PR middle-end/61848
* decl.c (merge_decls): Don't merge section name, comdat group or
tls model to newdecl symtab node, instead merge to olddecl.
Override existing olddecl section name. Set tls_model for all
thread-local vars, not just OMP thread-private ones. Remove
incorrect comment.
Index: gcc/c/c-decl.c
===
--- gcc/c/c-decl.c (revision 215233)
+++ gcc/c/c-decl.c (working copy)
@@ -2292,22 +2292,10 @@ merge_decls (tree newdecl, tree olddecl, tree newt
/* Merge the threadprivate attribute. */
if (TREE_CODE (olddecl) == VAR_DECL C_DECL_THREADPRIVATE_P (olddecl))
-{
- set_decl_tls_model (newdecl, DECL_TLS_MODEL (olddecl));
- C_DECL_THREADPRIVATE_P (newdecl) = 1;
-}
+C_DECL_THREADPRIVATE_P (newdecl) = 1;
if (CODE_CONTAINS_STRUCT (TREE_CODE (olddecl), TS_DECL_WITH_VIS))
{
- /* Merge the section attribute.
-We want to issue an error if the sections conflict but that
-must be done later in decl_attributes since we are called
-before attributes are assigned. */
- if ((DECL_EXTERNAL (olddecl) || TREE_PUBLIC (olddecl) || TREE_STATIC
(olddecl))
- DECL_SECTION_NAME (newdecl) == NULL
- DECL_SECTION_NAME (olddecl))
- set_decl_section_name (newdecl, DECL_SECTION_NAME (olddecl));
-
/* Copy the assembler name.
Currently, it can only be defined in the prototype. */
COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
@@ -2517,6 +2505,20 @@ merge_decls (tree newdecl, tree olddecl, tree newt
(char *) newdecl + sizeof (struct tree_decl_common),
tree_code_size (TREE_CODE (olddecl)) - sizeof (struct
tree_decl_common));
olddecl-decl_with_vis.symtab_node = snode;
+
+ if ((DECL_EXTERNAL (olddecl)
+ || TREE_PUBLIC (olddecl)
+ || TREE_STATIC (olddecl))
+ DECL_SECTION_NAME (newdecl) != NULL)
+ set_decl_section_name
