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defaults.h (ASM_OUTPUT_ALTERNATE_LABEL_NAME): Provide default.

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* defaults.h (ASM_OUTPUT_ALTERNATE_LABEL_NAME): Provide default.
        * emit-rtl.c (gen_label_rtx): Support LABEL_ALTERNATE_NAME.
        * final.c (final_scan_insn): Emit LABEL_ALTERNATE_NAME.
        * ggc-common.c (ggc_mark_rtx_children): Mark LABEL_ALTERNATE_NAME.
        * jump.c (delete_unreferenced_labels): Don't delete if
        LABEL_ALTERNATE_NAME is set.
        * print-rtl.c (print_rtx): Dump alternate name.
        * rtl.def (CODE_LABEL): Change format to "iuuis00s".
        * rtl.h (LABEL_ALTERNATE_NAME): Define.
        * rtl.texi (LABEL_ALTERNATE_NAME): Document.
        * tm.texi (ASM_OUTPUT_ALTERNATE_LABEL_NAME): Document.

From-SVN: r30382
This commit is contained in:
Catherine Moore 1999-11-03 21:55:51 +00:00 committed by Catherine Moore
parent 1e30f9b4da
commit 8cd0faaf32
11 changed files with 61 additions and 8 deletions
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14
gcc/ChangeLog
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@ -1,3 +1,17 @@
Wed Nov 3 15:40:23 1999 Catherine Moore <clm@cygnus.com>
* defaults.h (ASM_OUTPUT_ALTERNATE_LABEL_NAME): Provide default.
* emit-rtl.c (gen_label_rtx): Support LABEL_ALTERNATE_NAME.
* final.c (final_scan_insn): Emit LABEL_ALTERNATE_NAME.
* ggc-common.c (ggc_mark_rtx_children): Mark LABEL_ALTERNATE_NAME.
* jump.c (delete_unreferenced_labels): Don't delete if
LABEL_ALTERNATE_NAME is set.
* print-rtl.c (print_rtx): Dump alternate name.
* rtl.def (CODE_LABEL): Change format to "iuuis00s".
* rtl.h (LABEL_ALTERNATE_NAME): Define.
* rtl.texi (LABEL_ALTERNATE_NAME): Document.
* tm.texi (ASM_OUTPUT_ALTERNATE_LABEL_NAME): Document.
Wed Nov 3 15:39:19 1999 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* fix-header.c (recognized_extern, recognized_function): Constify

6
gcc/defaults.h
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@ -54,6 +54,12 @@ do { fprintf (FILE, "\t%s\t", ASM_LONG); \
} while (0)
#endif
/* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME. */
#ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
#define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
fprintf (FILE, "%s:\n", LABEL_ALTERNATE_NAME (INSN))
#endif
/* choose a reasonable default for ASM_OUTPUT_ASCII. */
#ifndef ASM_OUTPUT_ASCII

3
gcc/emit-rtl.c
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@ -1523,9 +1523,10 @@ gen_label_rtx ()
register rtx label;
label = gen_rtx_CODE_LABEL (VOIDmode, 0, NULL_RTX,
NULL_RTX, label_num++, NULL_PTR);
NULL_RTX, label_num++, NULL_PTR, NULL_PTR);
LABEL_NUSES (label) = 0;
LABEL_ALTERNATE_NAME (label) = NULL;
return label;
}

11
gcc/final.c
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@ -2418,14 +2418,19 @@ final_scan_insn (insn, file, optimize, prescan, nopeepholes)
ASM_OUTPUT_CASE_LABEL (file, "L", CODE_LABEL_NUMBER (insn),
NEXT_INSN (insn));
#else
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn));
if (LABEL_ALTERNATE_NAME (insn))
ASM_OUTPUT_ALTERNATE_LABEL_NAME (file, insn);
else
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn));
#endif
#endif
break;
}
}
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn));
if (LABEL_ALTERNATE_NAME (insn))
ASM_OUTPUT_ALTERNATE_LABEL_NAME (file, insn);
else
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (insn));
break;
default:

1
gcc/ggc-common.c
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@ -252,6 +252,7 @@ ggc_mark_rtx_children (r)
break;
case CODE_LABEL:
ggc_mark_rtx (LABEL_REFS (r));
ggc_mark_string (LABEL_ALTERNATE_NAME (r));
break;
case LABEL_REF:
ggc_mark_rtx (LABEL_NEXTREF (r));

4
gcc/jump.c
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@ -2433,7 +2433,9 @@ delete_unreferenced_labels (f)
for (insn = f; insn; )
{
if (GET_CODE (insn) == CODE_LABEL && LABEL_NUSES (insn) == 0)
if (GET_CODE (insn) == CODE_LABEL
&& LABEL_NUSES (insn) == 0
&& LABEL_ALTERNATE_NAME (insn) == NULL)
insn = delete_insn (insn);
else
{

6
gcc/print-rtl.c
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@ -354,7 +354,11 @@ print_rtx (in_rtx)
#endif
if (GET_CODE (in_rtx) == CODE_LABEL)
fprintf (outfile, " [num uses: %d]", LABEL_NUSES (in_rtx));
{
fprintf (outfile, " [num uses: %d]", LABEL_NUSES (in_rtx));
if (LABEL_ALTERNATE_NAME (in_rtx))
fprintf (outfile, " [alternate name: %s]", LABEL_ALTERNATE_NAME (in_rtx));
}
if (dump_for_graph
&& (is_insn || GET_CODE (in_rtx) == NOTE

5
gcc/rtl.def
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@ -376,8 +376,9 @@ DEF_RTL_EXPR(BARRIER, "barrier", "iuu", 'x')
3: is a number that is unique in the entire compilation.
4: is the user-given name of the label, if any.
5: is used in jump.c for the use-count of the label.
6: is used in flow.c to point to the chain of label_ref's to this label. */
DEF_RTL_EXPR(CODE_LABEL, "code_label", "iuuis00", 'x')
6: is used in flow.c to point to the chain of label_ref's to this label.
7: is the alternate label name. */
DEF_RTL_EXPR(CODE_LABEL, "code_label", "iuuis00s", 'x')
/* Say where in the code a source line starts, for symbol table's sake.
Contains a filename and a line number. Line numbers <= 0 are special:

3
gcc/rtl.h
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@ -597,6 +597,9 @@ extern const char * const note_insn_name[];
of LABEL_REFs that point at it, so unused labels can be deleted. */
#define LABEL_NUSES(RTX) XCINT(RTX, 5, CODE_LABEL)
/* Associate a name with a CODE_LABEL. */
#define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
/* The original regno this ADDRESSOF was built for. */
#define ADDRESSOF_REGNO(RTX) XCINT(RTX, 1, ADDRESSOF)

5
gcc/rtl.texi
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@ -2384,6 +2384,11 @@ The field @code{LABEL_NUSES} is only defined once the jump optimization
phase is completed and contains the number of times this label is
referenced in the current function.
@findex LABEL_ALTERNATE_NAME
The field @code{LABEL_ALTERNATE_NAME} is used to associate a name with
a @code{code_label}. If this field is defined, the alternate name will
be emitted instead of an internally generated label name.
@findex barrier
@item barrier
Barriers are placed in the instruction stream when control cannot flow

11
gcc/tm.texi
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@ -5736,6 +5736,17 @@ The usual definition of this macro is as follows:
fprintf (@var{stream}, "L%s%d:\n", @var{prefix}, @var{num})
@end example
@findex ASM_OUTPUT_ALTERNATE_LABEL_NAME
@item ASM_OUTPUT_ALTERNATE_LABEL_NAME (@var{stream}, @var{string})
A C statement to output to the stdio stream @var{stream} the string
@var{string}.
The default definition of this macro is as follows:
@example
fprintf (@var{stream}, "%s:\n", LABEL_ALTERNATE_NAME (INSN))
@end example
@findex ASM_GENERATE_INTERNAL_LABEL
@item ASM_GENERATE_INTERNAL_LABEL (@var{string}, @var{prefix}, @var{num})
A C statement to store into the string @var{string} a label whose name