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Commit b2d04ecf by Alan Modra Committed by Alan Modra
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rs6000.c (function_arg_boundary): Always align AltiVec vectors. 

	* config/rs6000/rs6000.c (function_arg_boundary): Always align
	AltiVec vectors.
	(function_arg_advance): Pass TARGET_32BIT -mabi=no-altivec AltiVec
	vectors by refererence.  Align the same for TARGET_64BIT to a 16
	byte boundary.  Remove useless code.  Add function comment.
	(function_arg): Similarly.  Move gpr rs6000_mixed_function_arg
	call to where it belongs.
	(function_arg_partial_nregs): Return true for all TARGET_32BIT
	-mabi=no-altivec AltiVec vectors.  Fix debug output.
	(rs6000_va_arg): Adjust for AltiVec change.

From-SVN: r81666
parent b6685939
Showing with 59 additions and 44 deletions
gcc/ChangeLog
2004-05-10 Alan Modra <amodra@bigpond.net.au>
* config/rs6000/rs6000.c (function_arg_boundary): Always align
AltiVec vectors.
(function_arg_advance): Pass TARGET_32BIT -mabi=no-altivec AltiVec
vectors by refererence. Align the same for TARGET_64BIT to a 16
byte boundary. Remove useless code. Add function comment.
(function_arg): Similarly. Move gpr rs6000_mixed_function_arg
call to where it belongs.
(function_arg_partial_nregs): Return true for all TARGET_32BIT
-mabi=no-altivec AltiVec vectors. Fix debug output.
(rs6000_va_arg): Adjust for AltiVec change.
2004-05-10 Paul Brook <paul@codesourcery.com>
* config/arm/arm.c (arm_promote_prototypes): Use TARGET_AAPCS_BASED.
......
gcc/config/rs6000/rs6000.c
......@@ -4192,7 +4192,7 @@ function_arg_boundary (enum machine_mode mode, tree type ATTRIBUTE_UNUSED)
return 64;
else if (SPE_VECTOR_MODE (mode))
return 64;
else if (TARGET_ALTIVEC_ABI && ALTIVEC_VECTOR_MODE (mode))
else if (ALTIVEC_VECTOR_MODE (mode))
return 128;
else
return PARM_BOUNDARY;
......@@ -4218,7 +4218,11 @@ rs6000_arg_size (enum machine_mode mode, tree type)
/* Update the data in CUM to advance over an argument
of mode MODE and data type TYPE.
(TYPE is null for libcalls where that information may not be available.) */
(TYPE is null for libcalls where that information may not be available.)
Note that for args passed by reference, function_arg will be called
with MODE and TYPE set to that of the pointer to the arg, not the arg
itself. */
void
function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
......@@ -4295,18 +4299,9 @@ function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
}
else
{
int n_words;
int n_words = rs6000_arg_size (mode, type);
int gregno = cum->sysv_gregno;
/* Aggregates, IEEE quad, and AltiVec vectors get passed by
reference. */
if ((type && AGGREGATE_TYPE_P (type))
|| mode == TFmode
|| ALTIVEC_VECTOR_MODE (mode))
n_words = 1;
else
n_words = rs6000_arg_size (mode, type);
/* Long long and SPE vectors are put in (r3,r4), (r5,r6),
(r7,r8) or (r9,r10). As does any other 2 word item such
as complex int due to a historical mistake. */
......@@ -4342,10 +4337,16 @@ function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
}
else
{
int align = (TARGET_32BIT && (cum->words & 1) != 0
&& function_arg_boundary (mode, type) == 64) ? 1 : 0;
int n_words = rs6000_arg_size (mode, type);
int align = function_arg_boundary (mode, type) / PARM_BOUNDARY - 1;
cum->words += align + rs6000_arg_size (mode, type);
/* The simple alignment calculation here works because
function_arg_boundary / PARM_BOUNDARY will only be 1 or 2.
If we ever want to handle alignments larger than 8 bytes for
32-bit or 16 bytes for 64-bit, then we'll need to take into
account the offset to the start of the parm save area. */
align &= cum->words;
cum->words += align + n_words;
if (GET_MODE_CLASS (mode) == MODE_FLOAT
&& TARGET_HARD_FLOAT && TARGET_FPRS)
......@@ -4544,7 +4545,11 @@ rs6000_mixed_function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
both an FP and integer register (or possibly FP reg and stack). Library
functions (when CALL_LIBCALL is set) always have the proper types for args,
so we can pass the FP value just in one register. emit_library_function
doesn't support PARALLEL anyway. */
doesn't support PARALLEL anyway.
Note that for args passed by reference, function_arg will be called
with MODE and TYPE set to that of the pointer to the arg, not the arg
itself. */
struct rtx_def *
function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
......@@ -4658,18 +4663,9 @@ function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
}
else
{
int n_words;
int n_words = rs6000_arg_size (mode, type);
int gregno = cum->sysv_gregno;
/* Aggregates, IEEE quad, and AltiVec vectors get passed by
reference. */
if ((type && AGGREGATE_TYPE_P (type))
|| mode == TFmode
|| ALTIVEC_VECTOR_MODE (mode))
n_words = 1;
else
n_words = rs6000_arg_size (mode, type);
/* Long long and SPE vectors are put in (r3,r4), (r5,r6),
(r7,r8) or (r9,r10). As does any other 2 word item such
as complex int due to a historical mistake. */
......@@ -4685,16 +4681,8 @@ function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
}
else
{
int align = (TARGET_32BIT && (cum->words & 1) != 0
&& function_arg_boundary (mode, type) == 64) ? 1 : 0;
int align_words = cum->words + align;
if (type && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
return NULL_RTX;
if (TARGET_32BIT && TARGET_POWERPC64
&& (mode == DImode || mode == BLKmode))
return rs6000_mixed_function_arg (cum, mode, type, align_words);
int align = function_arg_boundary (mode, type) / PARM_BOUNDARY - 1;
int align_words = cum->words + (cum->words & align);
if (USE_FP_FOR_ARG_P (cum, mode, type))
{
......@@ -4763,7 +4751,13 @@ function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode,
return gen_rtx_PARALLEL (mode, gen_rtvec_v (n, r));
}
else if (align_words < GP_ARG_NUM_REG)
{
if (TARGET_32BIT && TARGET_POWERPC64
&& (mode == DImode || mode == BLKmode))
return rs6000_mixed_function_arg (cum, mode, type, align_words);
return gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words);
}
else
return NULL_RTX;
}
......@@ -4810,7 +4804,10 @@ function_arg_partial_nregs (CUMULATIVE_ARGS *cum, enum machine_mode mode,
the argument itself. The pointer is passed in whatever way is
appropriate for passing a pointer to that type.
Under V.4, structures and unions are passed by reference.
Under V.4, aggregates and long double are passed by reference.
As an extension to all 32-bit ABIs, AltiVec vectors are passed by
reference unless the AltiVec vector extension ABI is in force.
As an extension to all ABIs, variable sized types are passed by
reference. */
......@@ -4820,17 +4817,18 @@ function_arg_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED,
enum machine_mode mode ATTRIBUTE_UNUSED,
tree type, int named ATTRIBUTE_UNUSED)
{
if (DEFAULT_ABI == ABI_V4
if ((DEFAULT_ABI == ABI_V4
&& ((type && AGGREGATE_TYPE_P (type))
|| mode == TFmode
|| (!TARGET_ALTIVEC_ABI && ALTIVEC_VECTOR_MODE (mode))))
|| mode == TFmode))
|| (TARGET_32BIT && !TARGET_ALTIVEC_ABI && ALTIVEC_VECTOR_MODE (mode))
|| (type && int_size_in_bytes (type) < 0))
{
if (TARGET_DEBUG_ARG)
fprintf (stderr, "function_arg_pass_by_reference: aggregate\n");
fprintf (stderr, "function_arg_pass_by_reference\n");
return 1;
}
return type && int_size_in_bytes (type) < 0;
return 0;
}
static void
......@@ -5081,8 +5079,12 @@ rs6000_va_arg (tree valist, tree type)
if (DEFAULT_ABI != ABI_V4)
{
/* Variable sized types are passed by reference. */
if (int_size_in_bytes (type) < 0)
/* Variable sized types are passed by reference, as are AltiVec
vectors when 32-bit and not using the AltiVec ABI extension. */
if (int_size_in_bytes (type) < 0
|| (TARGET_32BIT
&& !TARGET_ALTIVEC_ABI
&& ALTIVEC_VECTOR_MODE (TYPE_MODE (type))))
{
u = build_pointer_type (type);
......
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