re PR target/37216 ([cygming] Invalid alignment for SSE store to .comm data generated with -O3)
gcc/ChangeLog:
2009-05-28 Dave Korn <dave.korn.cygwin@gmail.com>
PR target/37216
* configure.ac (HAVE_GAS_ALIGNED_COMM): Add autoconf test and
macro definition for support of three-operand format aligned
.comm directive in assembler on cygwin/pe/mingw target OS.
* configure: Regenerate.
* config.in: Regenerate.
* config/i386/winnt.c (i386_pe_asm_output_aligned_decl_common): Use
aligned form of .comm directive if -mpe-aligned-commons is in effect.
* config/i386/cygming.opt (-mpe-aligned-commons): Add new option.
* doc/invoke.texi (-mpe-aligned-commons): Document new target option.
* doc/tm.texi (ASM_OUTPUT_COMMON): Document zero size commons.
gcc/testsuite/ChangeLog:
2009-05-28 Dave Korn <dave.korn.cygwin@gmail.com>
Uros Bizjak <ubizjak@gmail.com>
Danny Smith <dansmister@gmail.com>
PR target/37216
* lib/target-supports.exp (check_effective_target_pe_aligned_commons):
New function.
* gcc.target/i386/pr37216.c: New test source file.
* gcc.dg/compat/struct-layout-1_generate.c (dg_options[]): No longer
use -fno-common for testing Cygwin and MinGW targets.
Co-Authored-By: Danny Smith <dansmister@gmail.com>
Co-Authored-By: Uros Bizjak <ubizjak@gmail.com>
From-SVN: r147950
This commit is contained in:
Dave Korn
Dave Korn
parent
b10ca52232
commit
233215fe7c
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@ -1,3 +1,20 @@
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2009-05-28 Dave Korn <dave.korn.cygwin@gmail.com>
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PR target/37216
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* configure.ac (HAVE_GAS_ALIGNED_COMM): Add autoconf test and
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macro definition for support of three-operand format aligned
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.comm directive in assembler on cygwin/pe/mingw target OS.
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* configure: Regenerate.
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* config.h: Regenerate.
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* config/i386/winnt.c (i386_pe_asm_output_aligned_decl_common): Use
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aligned form of .comm directive if -mpe-aligned-commons is in effect.
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* config/i386/cygming.opt (-mpe-aligned-commons): Add new option.
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* doc/invoke.texi (-mpe-aligned-commons): Document new target option.
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* doc/tm.texi (ASM_OUTPUT_COMMON): Document zero size commons.
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2009-05-28 Ira Rosen <irar@il.ibm.com>
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PR tree-optimization/40254
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@ -844,6 +844,13 @@
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#endif
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/* Define if your assembler supports specifying the alignment of objects
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allocated using the GAS .comm command. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_GAS_ALIGNED_COMM
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#endif
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/* Define if your assembler supports .balign and .p2align. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_GAS_BALIGN_AND_P2ALIGN
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@ -45,3 +45,7 @@ Set Windows defines
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mwindows
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Target
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Create GUI application
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mpe-aligned-commons
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Target Var(use_pe_aligned_common) Init(HAVE_GAS_ALIGNED_COMM)
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Use the GNU extension to the PE format for aligned common data
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@ -499,8 +499,11 @@ i386_pe_asm_output_aligned_decl_common (FILE *stream, tree decl,
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{
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HOST_WIDE_INT rounded;
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/* Compute as in assemble_noswitch_variable, since we don't actually
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support aligned common. */
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/* Compute as in assemble_noswitch_variable, since we don't have
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support for aligned common on older binutils. We must also
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avoid emitting a common symbol of size zero, as this is the
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overloaded representation that indicates an undefined external
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symbol in the PE object file format. */
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rounded = size ? size : 1;
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rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1;
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rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
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@ -510,9 +513,13 @@ i386_pe_asm_output_aligned_decl_common (FILE *stream, tree decl,
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fprintf (stream, "\t.comm\t");
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assemble_name (stream, name);
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fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC "\t" ASM_COMMENT_START
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" " HOST_WIDE_INT_PRINT_DEC "\n",
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rounded, size);
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if (use_pe_aligned_common)
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fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC ", %d\n",
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size ? size : (HOST_WIDE_INT) 1,
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exact_log2 (align) - exact_log2 (CHAR_BIT));
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else
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fprintf (stream, ", " HOST_WIDE_INT_PRINT_DEC "\t" ASM_COMMENT_START
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" " HOST_WIDE_INT_PRINT_DEC "\n", rounded, size);
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}
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/* The Microsoft linker requires that every function be marked as
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@ -22631,6 +22631,44 @@ fi
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i[34567]86-*-* | x86_64-*-*)
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case $target_os in
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cygwin* | pe | mingw32*)
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# Recent binutils allows the three-operand form of ".comm" on PE. This
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# definition is used unconditionally to initialise the default state of
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# the target option variable that governs usage of the feature.
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echo "$as_me:$LINENO: checking assembler for .comm with alignment" >&5
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echo $ECHO_N "checking assembler for .comm with alignment... $ECHO_C" >&6
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if test "${gcc_cv_as_comm_has_align+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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gcc_cv_as_comm_has_align=no
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if test $in_tree_gas = yes; then
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if test $gcc_cv_gas_vers -ge `expr \( \( 2 \* 1000 \) + 19 \) \* 1000 + 52`
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then gcc_cv_as_comm_has_align=yes
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fi
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elif test x$gcc_cv_as != x; then
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echo '.comm foo,1,32' > conftest.s
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if { ac_try='$gcc_cv_as -o conftest.o conftest.s >&5'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }
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then
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gcc_cv_as_comm_has_align=yes
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else
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echo "configure: failed program was" >&5
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cat conftest.s >&5
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fi
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rm -f conftest.o conftest.s
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fi
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fi
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echo "$as_me:$LINENO: result: $gcc_cv_as_comm_has_align" >&5
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echo "${ECHO_T}$gcc_cv_as_comm_has_align" >&6
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cat >>confdefs.h <<_ACEOF
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#define HAVE_GAS_ALIGNED_COMM `if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`
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_ACEOF
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# Used for DWARF 2 in PE
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echo "$as_me:$LINENO: checking assembler for .secrel32 relocs" >&5
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echo $ECHO_N "checking assembler for .secrel32 relocs... $ECHO_C" >&6
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@ -2954,6 +2954,15 @@ changequote(,)dnl
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changequote([,])dnl
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case $target_os in
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cygwin* | pe | mingw32*)
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# Recent binutils allows the three-operand form of ".comm" on PE. This
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# definition is used unconditionally to initialise the default state of
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# the target option variable that governs usage of the feature.
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gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
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[2,19,52],,[.comm foo,1,32])
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AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
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[`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
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[Define if your assembler supports specifying the alignment
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of objects allocated using the GAS .comm command.])
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# Used for DWARF 2 in PE
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gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
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gcc_cv_as_ix86_pe_secrel32,
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@ -15678,6 +15678,15 @@ This option is available for Cygwin and MinGW targets. It
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specifies that a GUI application is to be generated by
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instructing the linker to set the PE header subsystem type
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appropriately.
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@item -mpe-aligned-commons
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@opindex mpe-aligned-commons
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This option is available for Cygwin and MinGW targets. It
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specifies that the GNU extension to the PE file format that
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permits the correct alignment of COMMON variables should be
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used when generating code. It will be enabled by default if
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GCC detects that the target assembler found during configuration
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supports the feature.
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@end table
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See also under @ref{i386 and x86-64 Options} for standard options.
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@ -7384,7 +7384,14 @@ outputting a single uninitialized variable.
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A C statement (sans semicolon) to output to the stdio stream
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@var{stream} the assembler definition of a common-label named
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@var{name} whose size is @var{size} bytes. The variable @var{rounded}
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is the size rounded up to whatever alignment the caller wants.
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is the size rounded up to whatever alignment the caller wants. It is
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possible that @var{size} may be zero, for instance if a struct with no
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other member than a zero-length array is defined. In this case, the
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backend must output a symbol definition that allocates at least one
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byte, both so that the address of the resulting object does not compare
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equal to any other, and because some object formats cannot even express
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the concept of a zero-sized common symbol, as that is how they represent
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an ordinary undefined external.
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Use the expression @code{assemble_name (@var{stream}, @var{name})} to
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output the name itself; before and after that, output the additional
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@ -1,3 +1,15 @@
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2009-05-28 Dave Korn <dave.korn.cygwin@gmail.com>
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Uros Bizjak <ubizjak@gmail.com>
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Danny Smith <dansmister@gmail.com>
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PR target/37216
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* lib/target-supports.exp (check_effective_target_pe_aligned_commons):
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New function.
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* gcc.target/i386/pr37216.c: New test source file.
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* gcc.dg/compat/struct-layout-1_generate.c (dg_options[]): No longer
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use -fno-common for testing Cygwin and MinGW targets.
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2009-05-28 Kai Tietz <kai.tietz@onevision.com>
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* g++.dg/ext/packed6.C (size_t): Use __extension__ and
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@ -46,7 +46,7 @@ const char *dg_options[] = {
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"/* { dg-options \"%s-I%s\" } */\n",
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"/* { dg-options \"%s-I%s -Wno-abi\" } */\n",
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"/* { dg-options \"%s-I%s -mno-mmx -Wno-abi\" { target i?86-*-* x86_64-*-* } } */\n",
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"/* { dg-options \"%s-I%s -fno-common\" { target hppa*-*-hpux* powerpc*-*-darwin* *-*-mingw32* *-*-cygwin* } } */\n",
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"/* { dg-options \"%s-I%s -fno-common\" { target hppa*-*-hpux* powerpc*-*-darwin* } } */\n",
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"/* { dg-options \"%s-I%s -mno-mmx -fno-common -Wno-abi\" { target i?86-*-darwin* x86_64-*-darwin* } } */\n",
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"/* { dg-options \"%s-I%s -mno-base-addresses\" { target mmix-*-* } } */\n",
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"/* { dg-options \"%s-I%s -mlongcalls -mtext-section-literals\" { target xtensa*-*-* } } */\n"
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@ -0,0 +1,17 @@
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/* { dg-do run } */
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/* { dg-options "-O3 -msse2" } */
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/* { dg-options "-O3 -msse2 -mpe-aligned-commons" { target pe_aligned_commons } } */
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#include "sse2-check.h"
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int iarr[64];
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int iint = 0;
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void
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sse2_test (void)
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{
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int i;
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for (i = 0; i < 64; i++)
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iarr[i] = -2;
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}
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@ -611,6 +611,18 @@ proc check_effective_target_pthread {} {
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} "-pthread"]
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}
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# Return 1 if compilation with -mpe-aligned-commons is error-free
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# for trivial code, 0 otherwise.
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proc check_effective_target_pe_aligned_commons {} {
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if { [istarget *-*-cygwin*] || [istarget *-*-mingw*] } {
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return [check_no_compiler_messages pe_aligned_commons object {
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int foo;
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} "-mpe-aligned-commons"]
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}
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return 0
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}
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# Return 1 if the target supports -fstack-protector
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proc check_effective_target_fstack_protector {} {
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return [check_runtime fstack_protector {
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