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stmt.c (expand_asm_operands): Invoke MD_ASM_CLOBBERS if present.

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* stmt.c (expand_asm_operands): Invoke MD_ASM_CLOBBERS if present.
        * tm.texi (MD_ASM_CLOBBERS): Document it.

From-SVN: r29064
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Richard Henderson 1999-09-02 13:01:46 -07:00 committed by Richard Henderson
parent 773c6f0076
commit 57bcb97aac
3 changed files with 38 additions and 0 deletions
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25
gcc/ChangeLog
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@ -1,3 +1,28 @@
Thu Sep 2 13:00:48 1999 Richard Henderson <rth@cygnus.com>
* stmt.c (expand_asm_operands): Invoke MD_ASM_CLOBBERS if present.
* tm.texi (MD_ASM_CLOBBERS): Document it.
Thu Sep 2 10:22:40 1999 Richard Henderson <rth@cygnus.com>
* dwarf2out.c (dwarf2out_line): Constify `lastfile'.
* except.c (expand_rethrow): Remove unused variable.
* expr.c (do_jump_by_parts_greater_rtx): Likewise.
* flow.c (replace_insns): Likewise.
(create_edge_list, verify_edge_list): Likewise.
* gcse.c (cprop_cc0_jump): Protect declaration with HAVE_cc0.
* genemit.c (gen_expand): Only emit `operands[N]' decl if there
is special code to run.
(main): Don't define operands to emit_operand.
* genrecog.c (main): Don't emit an empty peephole2_insn function.
* rtl.h (NOTE_BASIC_BLOCK): Use X0BBDEF.
* alpha/alpha.h (normal_memory_operand): Declare.
(reg_no_subreg_operand): Declare.
* alpha/elf.h (ASM_DECLARE_OBJECT_NAME): Use HOST_WIDE_INT_PRINT_DEC.
Thu Sep 2 10:19:20 1999 Richard Henderson <rth@cygnus.com>
* c-parse.in (compstmt_primary_start): New, broken out of first

8
gcc/stmt.c
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@ -1153,6 +1153,14 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
return;
}
#ifdef MD_ASM_CLOBBERS
/* Sometimes we wish to automatically clobber registers across an asm.
Case in point is when the i386 backend moved from cc0 to a hard reg --
maintaining source-level compatability means automatically clobbering
the flags register. */
MD_ASM_CLOBBERS (clobbers);
#endif
/* Count the number of meaningful clobbered registers, ignoring what
we would ignore later. */
nclobbers = 0;

5
gcc/tm.texi
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@ -7713,6 +7713,11 @@ unit may not be bound to undefined symbols in another translation unit
without user intervention. For instance, under Microsoft Windows
symbols must be explicitly imported from shared libraries (DLLs).
@findex MD_ASM_CLOBBERS
@item MD_ASM_CLOBBERS
A C statement that adds to @var{CLOBBERS} @code{STRING_CST} trees for
any hard regs the port wishes to automatically clobber for all asms.
@findex ISSUE_RATE
@item ISSUE_RATE
A C expression that returns how many instructions can be issued at the