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configure.in: Add check for GAS subsection -1 support.

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* configure.in: Add check for GAS subsection -1 support.
	* acconfig.h (HAVE_GAS_SUBSECTION_ORDERING): Add.
	* configure config.in: Rebuilt.
	* config/sparc/sparc.h (CASE_VECTOR_MODE): For V9 flag_pic, use
	SImode is subsection -1 works, else use DImode.
	(ASM_OUTPUT_ADDR_VEC_START, ASM_OUTPUT_ADDR_VEC_END): Define if
	subsection -1 works.
	* config/sparc/sparc.c (sparc_output_addr_vec,
	sparc_output_addr_diff_vec): Use them if defined.

From-SVN: r22383
This commit is contained in:
Jakub Jelinek 1998-09-11 00:28:30 +02:00 • committed by David S. Miller
parent 6cf624a0a5
commit d1accaa33d
7 changed files with 130 additions and 1 deletions
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12
gcc/ChangeLog
View file

@ -1,3 +1,15 @@
Thu Sep 10 21:19:10 1998 Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz>
* configure.in: Add check for GAS subsection -1 support.
* acconfig.h (HAVE_GAS_SUBSECTION_ORDERING): Add.
* configure config.in: Rebuilt.
* config/sparc/sparc.h (CASE_VECTOR_MODE): For V9 flag_pic, use
SImode is subsection -1 works, else use DImode.
(ASM_OUTPUT_ADDR_VEC_START, ASM_OUTPUT_ADDR_VEC_END): Define if
subsection -1 works.
* config/sparc/sparc.c (sparc_output_addr_vec,
sparc_output_addr_diff_vec): Use them if defined.
Thu Sep 10 10:46:01 1998 Mark Mitchell <mark@markmitchell.com>
* tree.h (DECL_ORIGIN): New macro.

4
gcc/acconfig.h
View file

@ -20,6 +20,10 @@
/* Define if your assembler supports .balign and .p2align. */
#undef HAVE_GAS_BALIGN_AND_P2ALIGN
/* Define if your assembler supports .subsection and .subsection -1 starts
emitting at the beginning of your section */
#undef HAVE_GAS_SUBSECTION_ORDERING
/* Define if you have a working <inttypes.h> header file. */
#undef HAVE_INTTYPES_H

4
gcc/config.in
View file

@ -21,6 +21,10 @@
/* Define if your assembler supports .balign and .p2align. */
#undef HAVE_GAS_BALIGN_AND_P2ALIGN
/* Define if your assembler supports .subsection and .subsection -1 starts
emitting at the beginning of your section */
#undef HAVE_GAS_SUBSECTION_ORDERING
/* Define if you have a working <inttypes.h> header file. */
#undef HAVE_INTTYPES_H

16
gcc/config/sparc/sparc.c
View file

@ -7196,6 +7196,10 @@ sparc_output_addr_vec (vec)
rtx lab = XEXP (vec, 0), body = XEXP (vec, 1);
int idx, vlen = XVECLEN (body, 0);
#ifdef ASM_OUTPUT_ADDR_VEC_START
ASM_OUTPUT_ADDR_VEC_START (asm_out_file);
#endif
#ifdef ASM_OUTPUT_CASE_LABEL
ASM_OUTPUT_CASE_LABEL (asm_out_file, "L", CODE_LABEL_NUMBER (lab),
NEXT_INSN (lab));
@ -7208,6 +7212,10 @@ sparc_output_addr_vec (vec)
ASM_OUTPUT_ADDR_VEC_ELT
(asm_out_file, CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 0, idx), 0)));
}
#ifdef ASM_OUTPUT_ADDR_VEC_END
ASM_OUTPUT_ADDR_VEC_END (asm_out_file);
#endif
}
static void
@ -7218,6 +7226,10 @@ sparc_output_addr_diff_vec (vec)
rtx base = XEXP (XEXP (body, 0), 0);
int idx, vlen = XVECLEN (body, 1);
#ifdef ASM_OUTPUT_ADDR_VEC_START
ASM_OUTPUT_ADDR_VEC_START (asm_out_file);
#endif
#ifdef ASM_OUTPUT_CASE_LABEL
ASM_OUTPUT_CASE_LABEL (asm_out_file, "L", CODE_LABEL_NUMBER (lab),
NEXT_INSN (lab));
@ -7233,6 +7245,10 @@ sparc_output_addr_diff_vec (vec)
CODE_LABEL_NUMBER (XEXP (XVECEXP (body, 1, idx), 0)),
CODE_LABEL_NUMBER (base));
}
#ifdef ASM_OUTPUT_ADDR_VEC_END
ASM_OUTPUT_ADDR_VEC_END (asm_out_file);
#endif
}
static void

21
gcc/config/sparc/sparc.h
View file

@ -2473,8 +2473,15 @@ extern struct rtx_def *legitimize_pic_address ();
for the index in the tablejump instruction. */
/* If we ever implement any of the full models (such as CM_FULLANY),
this has to be DImode in that case */
#ifdef HAVE_GAS_SUBSECTION_ORDERING
#define CASE_VECTOR_MODE \
(! TARGET_PTR64 ? SImode : flag_pic ? SImode : TARGET_CM_MEDLOW ? SImode : DImode)
#else
/* If assembler does not have working .subsection -1, we use DImode for pic, as otherwise
we have to sign extend which slows things down. */
#define CASE_VECTOR_MODE \
(! TARGET_PTR64 ? SImode : flag_pic ? DImode : TARGET_CM_MEDLOW ? SImode : DImode)
#endif
/* Define as C expression which evaluates to nonzero if the tablejump
instruction expects the table to contain offsets from the address of the
@ -2999,6 +3006,20 @@ do { \
fputc ('\n', FILE); \
} while (0)
/* This is what to output before and after case-vector (both
relative and absolute). If .subsection -1 works, we put case-vectors
at the beginning of the current section. */
#ifdef HAVE_GAS_SUBSECTION_ORDERING
#define ASM_OUTPUT_ADDR_VEC_START(FILE) \
fprintf(FILE, "\t.subsection\t-1\n")
#define ASM_OUTPUT_ADDR_VEC_END(FILE) \
fprintf(FILE, "\t.previous\n")
#endif
/* This is how to output an assembler line
that says to advance the location counter
to a multiple of 2**LOG bytes. */

40
gcc/configure vendored
View file

@ -5534,6 +5534,44 @@ EOF
fi
echo "$ac_t""$gcc_cv_as_alignment_features" 1>&6
echo $ac_n "checking assembler subsection support""... $ac_c" 1>&6
echo "configure:5539: checking assembler subsection support" >&5
gcc_cv_as_subsections=
if test x$gcc_cv_as != x; then
# Check if we have .subsection
echo ".subsection 1" > conftest.s
if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
gcc_cv_as_subsections=".subsection"
if test -x nm$host_exeext; then
gcc_cv_nm=./nm$host_exeext
elif test x$host = x$target; then
# Native build.
gcc_cv_nm=nm$host_exeext
fi
if test x$gcc_cv_nm != x; then
cat > conftest.s <<EOF
conftest_label1: .word 0
.subsection -1
conftest_label2: .word 0
.previous
EOF
if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
$gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
$gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
if ! cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1; then
gcc_cv_as_subsections="working .subsection -1"
cat >> confdefs.h <<\EOF
#define HAVE_GAS_SUBSECTION_ORDERING 1
EOF
fi
fi
fi
fi
rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
echo "$ac_t""$gcc_cv_as_subsections" 1>&6
# Figure out what language subdirectories are present.
subdirs=
for lang in ${srcdir}/*/config-lang.in ..
@ -5731,7 +5769,7 @@ fi
# Warn if using init_priority.
echo $ac_n "checking whether to enable init_priority by default""... $ac_c" 1>&6
echo "configure:5735: checking whether to enable init_priority by default" >&5
echo "configure:5773: checking whether to enable init_priority by default" >&5
if test x$enable_init_priority != xyes; then
enable_init_priority=no
fi

34
gcc/configure.in
View file

@ -3669,6 +3669,40 @@ if test x$gcc_cv_as != x; then
fi
AC_MSG_RESULT($gcc_cv_as_alignment_features)
AC_MSG_CHECKING(assembler subsection support)
gcc_cv_as_subsections=
if test x$gcc_cv_as != x; then
# Check if we have .subsection
echo ".subsection 1" > conftest.s
if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
gcc_cv_as_subsections=".subsection"
if test -x nm$host_exeext; then
gcc_cv_nm=./nm$host_exeext
elif test x$host = x$target; then
# Native build.
gcc_cv_nm=nm$host_exeext
fi
if test x$gcc_cv_nm != x; then
cat > conftest.s <<EOF
conftest_label1: .word 0
.subsection -1
conftest_label2: .word 0
.previous
EOF
if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
$gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
$gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
if ! cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1; then
gcc_cv_as_subsections="working .subsection -1"
AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING)
fi
fi
fi
fi
rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
AC_MSG_RESULT($gcc_cv_as_subsections)
# Figure out what language subdirectories are present.
subdirs=
for lang in ${srcdir}/*/config-lang.in ..