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i386.c (internal_label_prefix): New.

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* config/i386/i386.c (internal_label_prefix): New.
        (internal_label_prefix_len): New.
        (override_options): Set them.
        (local_symbolic_operand): New.
        (legitimate_pic_address_disp_p): Use it.
        (legitimize_pic_address): Likewise.

From-SVN: r45605
This commit is contained in:
Richard Henderson 2001-09-14 10:19:04 -07:00
parent 0e1f7b2a8f
commit 623fe81066
2 changed files with 70 additions and 17 deletions
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11
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2001-09-14 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (internal_label_prefix): New.
(internal_label_prefix_len): New.
(override_options): Set them.
(local_symbolic_operand): New.
(legitimate_pic_address_disp_p): Use it.
(legitimize_pic_address): Likewise.
2001-09-14 Marc Espie <espie@openbsd.org>
* config/i386/unix.h (ASM_OUTPUT_MI_THUNK): Generate reference to GOT
@ -142,7 +151,7 @@
sparc_flat_function_epilogue): Likewise.
2001-09-13 Markus Werle <numerical.simulation@web.de>
Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
* doc/install.texi (Binaries): Add "Binaries for HP-UX 11.00 at
Aachen University of Technology".

76
gcc/config/i386/i386.c
View File

@ -579,7 +579,12 @@ const char *ix86_branch_cost_string;
/* Power of two alignment for functions. */
const char *ix86_align_funcs_string;
/* Prefix built by ASM_GENERATE_INTERNAL_LABEL. */
static char internal_label_prefix[16];
static int internal_label_prefix_len;
static int local_symbolic_operand PARAMS ((rtx, enum machine_mode));
static void output_pic_addr_const PARAMS ((FILE *, rtx, int));
static void put_condition_code PARAMS ((enum rtx_code, enum machine_mode,
int, int, FILE *));
@ -948,6 +953,15 @@ override_options ()
&& !(target_flags & MASK_NO_ACCUMULATE_OUTGOING_ARGS)
&& !optimize_size)
target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
/* Figure out what ASM_GENERATE_INTERNAL_LABEL builds as a prefix. */
{
char *p;
ASM_GENERATE_INTERNAL_LABEL (internal_label_prefix, "LX", 0);
p = strchr (internal_label_prefix, 'X');
internal_label_prefix_len = p - internal_label_prefix;
*p = '\0';
}
}
void
@ -1530,6 +1544,41 @@ pic_symbolic_operand (op, mode)
return 0;
}
/* Return true if OP is a symbolic operand that resolves locally. */
static int
local_symbolic_operand (op, mode)
rtx op;
enum machine_mode mode ATTRIBUTE_UNUSED;
{
if (GET_CODE (op) == LABEL_REF)
return 1;
if (GET_CODE (op) == CONST
&& GET_CODE (XEXP (op, 0)) == PLUS
&& GET_CODE (XEXP (XEXP (op, 0), 1)) == CONST_INT)
op = XEXP (XEXP (op, 0), 0);
if (GET_CODE (op) != SYMBOL_REF)
return 0;
/* These we've been told are local by varasm and encode_section_info
respectively. */
if (CONSTANT_POOL_ADDRESS_P (op) || SYMBOL_REF_FLAG (op))
return 1;
/* There is, however, a not insubstantial body of code in the rest of
the compiler that assumes it can just stick the results of
ASM_GENERATE_INTERNAL_LABEL in a symbol_ref and have done. */
/* ??? This is a hack. Should update the body of the compiler to
always create a DECL an invoke ENCODE_SECTION_INFO. */
if (strncmp (XSTR (op, 0), internal_label_prefix,
internal_label_prefix_len) == 0)
return 1;
return 0;
}
/* Test for a valid operand for a call instruction. Don't allow the
arg pointer register or virtual regs since they may decay into
reg + const, which the patterns can't handle. */
@ -3218,15 +3267,16 @@ legitimate_pic_address_disp_p (disp)
return 0;
/* Must be @GOT or @GOTOFF. */
if (XINT (disp, 1) != 6
&& XINT (disp, 1) != 7)
return 0;
switch (XINT (disp, 1))
{
case 6: /* @GOT */
return GET_CODE (XVECEXP (disp, 0, 0)) == SYMBOL_REF;
if (GET_CODE (XVECEXP (disp, 0, 0)) != SYMBOL_REF
&& GET_CODE (XVECEXP (disp, 0, 0)) != LABEL_REF)
return 0;
return 1;
case 7: /* @GOTOFF */
return local_symbolic_operand (XVECEXP (disp, 0, 0), Pmode);
}
return 0;
}
/* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression that is a valid
@ -3471,10 +3521,7 @@ legitimize_pic_address (orig, reg)
rtx new = orig;
rtx base;
if (GET_CODE (addr) == LABEL_REF
|| (GET_CODE (addr) == SYMBOL_REF
&& (CONSTANT_POOL_ADDRESS_P (addr)
|| SYMBOL_REF_FLAG (addr))))
if (local_symbolic_operand (addr, Pmode))
{
/* This symbol may be referenced via a displacement from the PIC
base address (@GOTOFF). */
@ -3526,10 +3573,7 @@ legitimize_pic_address (orig, reg)
/* Check first to see if this is a constant offset from a @GOTOFF
symbol reference. */
if ((GET_CODE (op0) == LABEL_REF
|| (GET_CODE (op0) == SYMBOL_REF
&& (CONSTANT_POOL_ADDRESS_P (op0)
|| SYMBOL_REF_FLAG (op0))))
if (local_symbolic_operand (op0, Pmode)
&& GET_CODE (op1) == CONST_INT)
{
current_function_uses_pic_offset_table = 1;