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* expr.c (expr): Simplify foo-foo here. 

(clean_up_expression): Remove O_subtract code.
This commit is contained in:
Alan Modra 2002-09-20 00:58:39 +00:00
parent dea9781227
commit f6cf69d700
2 changed files with 19 additions and 31 deletions
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30
gas/ChangeLog
View File

@ -1,9 +1,13 @@
2002-09-20 Alan Modra <amodra@bigpond.net.au>
* expr.c (expr): Simplify foo-foo here.
(clean_up_expression): Remove O_subtract code.
* write.h (struct fix): Add fx_dot_value.
(dot_value): Declare.
* write.c (dot_value): New var.
(fix_new_internal): Save dot_value as fx_dot_value.
(fixup_segment): Adjust fx_offset using fx_dot_value.
* expr.c (expr): Update dot_value.
2002-09-19 Jakub Jelinek <jakub@redhat.com>
@ -59,7 +63,7 @@
* config/tc-arm.c (md_apply_fix3): Note that an implemented
BFD_RELOC_ARM_IMMEDIATE has been done.
(tc_gen_reloc): Do not issue reloc number of unimplemented
(tc_gen_reloc): Do not issue reloc number of unimplemented
BFD_RELOC_ARM_IMMEDIATE and BFD_RELOC_ARM_OFFSET_IMM relocs -
their name is already in the error message - plus remove them
from the default case.
@ -115,10 +119,10 @@
2002-09-05 Jeff Law <law@redhat.com>
* config/tc-hppa.c (md_apply_fix3): Don't set fx_done for
marker relocations such as ENTRY/EXIT.
* config/tc-hppa.h (MD_APPLY_SYM_VALUE): Definition applies
to both OBJ_ELF and OBJ_SOM.
* config/tc-hppa.c (md_apply_fix3): Don't set fx_done for
marker relocations such as ENTRY/EXIT.
* config/tc-hppa.h (MD_APPLY_SYM_VALUE): Definition applies
to both OBJ_ELF and OBJ_SOM.
2002-09-05 Alan Modra <amodra@bigpond.net.au>
@ -2517,7 +2521,7 @@
(shmedia_md_convert_frag): Handle non-PC-relative UNDEF_MOVI
and MOVI_16.
(shmedia_md_estimate_size_before_relax): Remove redundant
blocks. Set fragP->fr_var even if relaxation type unchanged.
blocks. Set fragP->fr_var even if relaxation type unchanged.
Retain UNDEF_MOVI until expression decays to number.
2002-01-24 Alexandre Oliva <aoliva@redhat.com>
* config/tc-sh64.c (shmedia_init_reloc): Handle new SHmedia PIC
@ -2639,13 +2643,13 @@
(shmedia_frob_file_before_adjust): Ditto.
(shmedia_md_apply_fix) <case BFD_RELOC_SH_IMM_MEDLOW16>: Cast mask
to valueT to remove signedness.
(shmedia_md_convert_frag): Add parameter final. Rename parameter
(shmedia_md_convert_frag): Add parameter final. Rename parameter
headers to output_bfd. Do not evaluate symbols if final is false;
do emit fixups.
(shmedia_md_estimate_size_before_relax) <case C (MOVI_IMM_32,
UNDEF_MOVI) et al>: If symbol cannot be modified to be PC-relative
to the current frag, call shmedia_md_convert_frag to emit fixups
and make frag_wane neutralize the frag. Update comments.
and make frag_wane neutralize the frag. Update comments.
* config/tc-sh.c (md_convert_frag): Change caller of
shmedia_md_convert_frag.
2001-01-06 Hans-Peter Nilsson <hpn@cygnus.com>
@ -2657,7 +2661,7 @@
(shmedia_check_limits): Fix range check being off-by-one for PTA.
* config/tc-sh.c: Ditto. Add proper comments to #ifdef/#ifndef
wrappers.
(SH64PCREL16_F): Increment for proper max-PTA handling. Update
(SH64PCREL16_F): Increment for proper max-PTA handling. Update
comment.
(SH64PCREL16_M, MOVI_16_M): Correct range thinko.
(SH64PCREL48_M, MOVI_48_M): Similar; don't count in length of
@ -2680,7 +2684,7 @@
(sh64_expand, sh64_pt32): New variables.
(shmedia_init_reloc): Handle BFD_RELOC_SH_PT_16.
(shmedia_md_apply_fix): Hold original fixP->fx_r_type in
orig_fx_r_type. Change SHMEDIA_BFD_RELOC_PT into
orig_fx_r_type. Change SHMEDIA_BFD_RELOC_PT into
BFD_RELOC_SH_PT_16. Handle BFD_RELOC_SH_PT_16 as pc-relative.
<resolved previously-pc-relative relocs>: Handle
SHMEDIA_BFD_RELOC_PT and BFD_RELOC_SH_PT_16.
@ -2817,7 +2821,7 @@
(shmedia_md_pcrel_from_section): ...here.
(shmedia_md_apply_fix): Handle fixups for 16-bit operands that has
turned completely resolved. Adjust relocation type for 16-bit
immediate operands that has turned PC-relative. Adjust back for
immediate operands that has turned PC-relative. Adjust back for
MD_PCREL_FROM_SECTION being applied twice.
(shmedia_md_convert_frag): Always emit reloc for expression with
global or weak symbol. Handle relaxation result for PC-relative
@ -2831,7 +2835,7 @@
(shmedia_build_Mytes): CSE &operands->operands[j] into variable
opjp.
<case A_IMMS16>: Fix typo for initial minor relaxation type of
MOVI expansion. If X_op_symbol of the immediate expression is
MOVI expansion. If X_op_symbol of the immediate expression is
set, make an expression symbol for the argument to frag_var.
* config/tc-sh.c (MOVI_IMM_32_PCREL, MOVI_IMM_64_PCREL): New
relaxations.
@ -2855,7 +2859,7 @@
(sh64_adjust_symtab): For remaining datalabel symbols, set to
undefined and set STT_DATALABEL.
(sh64_frob_label): Initialize TC symbol field.
(sh64_consume_datalabel): Actually implement semantics. New
(sh64_consume_datalabel): Actually implement semantics. New
parameter operandf, call it instead of expression.
(sh64_exclude_symbol): New.
* config/tc-sh64.h (md_parse_name): Pass on the function operand

20
gas/expr.c
View File

@ -1347,8 +1347,6 @@ operand (expressionP)
Elsewise we waste time special-case testing. Sigh. Ditto SEG_ABSENT.
Out: expressionS may have been modified:
'foo-foo' symbol references cancelled to 0, which changes X_op
from O_subtract to O_constant.
Unused fields zeroed to help expr (). */
static void
@ -1371,21 +1369,6 @@ clean_up_expression (expressionP)
case O_bit_not:
expressionP->X_op_symbol = NULL;
break;
case O_subtract:
if (expressionP->X_op_symbol == expressionP->X_add_symbol
|| ((symbol_get_frag (expressionP->X_op_symbol)
== symbol_get_frag (expressionP->X_add_symbol))
&& SEG_NORMAL (S_GET_SEGMENT (expressionP->X_add_symbol))))
{
addressT diff = (S_GET_VALUE (expressionP->X_add_symbol)
- S_GET_VALUE (expressionP->X_op_symbol));
expressionP->X_op = O_constant;
expressionP->X_add_symbol = NULL;
expressionP->X_op_symbol = NULL;
expressionP->X_add_number += diff;
}
break;
default:
break;
}
@ -1751,7 +1734,8 @@ expr (rankarg, resultP)
&& resultP->X_op == O_symbol
&& (symbol_get_frag (right.X_add_symbol)
== symbol_get_frag (resultP->X_add_symbol))
&& SEG_NORMAL (rightseg))
&& (SEG_NORMAL (rightseg)
|| right.X_add_symbol == resultP->X_add_symbol))
{
resultP->X_add_number -= right.X_add_number;
resultP->X_add_number += (S_GET_VALUE (resultP->X_add_symbol)