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expmed.c (extract_bit_field): Do not use insv/extv/extzv patterns if the bitsize is zero.

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* expmed.c (extract_bit_field): Do not use insv/extv/extzv patterns
	if the bitsize is zero.
	* doc/md.texi (Standard Pattern Names): Document it.

	* config/ia64/ia64.c (ia64_pass_by_reference): Delete.
	(TARGET_PASS_BY_REFERENCE): Likewise.

From-SVN: r106605
This commit is contained in:
Eric Botcazou 2005-11-07 19:14:02 +00:00 committed by Eric Botcazou
parent a7297856af
commit 3ab997e838
4 changed files with 17 additions and 21 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2005-11-07 Eric Botcazou <ebotcazou@adacore.com>
* expmed.c (extract_bit_field): Do not use insv/extv/extzv patterns
if the bitsize is zero.
* doc/md.texi (Standard Pattern Names): Document it.
* config/ia64/ia64.c (ia64_pass_by_reference): Delete.
(TARGET_PASS_BY_REFERENCE): Likewise.
2005-11-07 Ian Lance Taylor <ian@airs.com>
PR rtl-optimization/24683

15
gcc/config/ia64/ia64.c
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@ -176,8 +176,6 @@ static rtx gen_fr_restore_x (rtx, rtx, rtx);
static enum machine_mode hfa_element_mode (tree, bool);
static void ia64_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode,
tree, int *, int);
static bool ia64_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
tree, bool);
static int ia64_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
tree, bool);
static bool ia64_function_ok_for_sibcall (tree, tree);
@ -349,8 +347,6 @@ static const struct attribute_spec ia64_attribute_table[] =
#undef TARGET_FUNCTION_OK_FOR_SIBCALL
#define TARGET_FUNCTION_OK_FOR_SIBCALL ia64_function_ok_for_sibcall
#undef TARGET_PASS_BY_REFERENCE
#define TARGET_PASS_BY_REFERENCE ia64_pass_by_reference
#undef TARGET_ARG_PARTIAL_BYTES
#define TARGET_ARG_PARTIAL_BYTES ia64_arg_partial_bytes
@ -4221,17 +4217,6 @@ ia64_function_arg_boundary (enum machine_mode mode, tree type)
return PARM_BOUNDARY;
}
/* Variable sized types are passed by reference. */
/* ??? At present this is a GCC extension to the IA-64 ABI. */
static bool
ia64_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED,
enum machine_mode mode ATTRIBUTE_UNUSED,
tree type, bool named ATTRIBUTE_UNUSED)
{
return type && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST;
}
/* True if it is OK to do sibling call optimization for the specified
call expression EXP. DECL will be the called function, or NULL if
this is an indirect call. */

4
gcc/doc/md.texi
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@ -3551,7 +3551,7 @@ Operand 1 may have mode @code{byte_mode} or @code{word_mode}; often
be valid for @code{word_mode}.
The RTL generation pass generates this instruction only with constants
for operands 2 and 3.
for operands 2 and 3 and the constant is never zero for operand 2.
The bit-field value is sign-extended to a full word integer
before it is stored in operand 0.
@ -3569,7 +3569,7 @@ operand 2 the starting bit. Operand 0 may have mode @code{byte_mode} or
Operands 1 and 2 must be valid for @code{word_mode}.
The RTL generation pass generates this instruction only with constants
for operands 1 and 2.
for operands 1 and 2 and the constant is never zero for operand 1.
@cindex @code{mov@var{mode}cc} instruction pattern
@item @samp{mov@var{mode}cc}

10
gcc/expmed.c
View File

@ -608,8 +608,8 @@ store_bit_field (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
if (HAVE_insv
&& GET_MODE (value) != BLKmode
&& !(bitsize == 1 && GET_CODE (value) == CONST_INT)
/* Ensure insv's size is wide enough for this field. */
&& (GET_MODE_BITSIZE (op_mode) >= bitsize)
&& bitsize > 0
&& GET_MODE_BITSIZE (op_mode) >= bitsize
&& ! ((REG_P (op0) || GET_CODE (op0) == SUBREG)
&& (bitsize + bitpos > GET_MODE_BITSIZE (op_mode))))
{
@ -1356,7 +1356,8 @@ extract_bit_field (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
if (unsignedp)
{
if (HAVE_extzv
&& (GET_MODE_BITSIZE (extzv_mode) >= bitsize)
&& bitsize > 0
&& GET_MODE_BITSIZE (extzv_mode) >= bitsize
&& ! ((REG_P (op0) || GET_CODE (op0) == SUBREG)
&& (bitsize + bitpos > GET_MODE_BITSIZE (extzv_mode))))
{
@ -1488,7 +1489,8 @@ extract_bit_field (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
else
{
if (HAVE_extv
&& (GET_MODE_BITSIZE (extv_mode) >= bitsize)
&& bitsize > 0
&& GET_MODE_BITSIZE (extv_mode) >= bitsize
&& ! ((REG_P (op0) || GET_CODE (op0) == SUBREG)
&& (bitsize + bitpos > GET_MODE_BITSIZE (extv_mode))))
{