the highest numbered allocable register first.
@end defmac
-@defmac ADJUST_REG_ALLOC_ORDER
+@defmac ORDER_REGS_FOR_LOCAL_ALLOC
A C statement (sans semicolon) to choose the order in which to allocate
hard registers for pseudo-registers local to a basic block.
On most machines, it is not necessary to define this macro.
@end defmac
-@defmac HONOR_REG_ALLOC_ORDER
-Normally, IRA tries to estimate the costs for saving a register in the
-prologue and restoring it in the epilogue. This discourages it from
-using call-saved registers. If a machine wants to ensure that IRA
-allocates registers in the order given by REG_ALLOC_ORDER even if some
-call-saved registers appear earlier than call-used ones, this macro
-should be defined.
-@end defmac
-
@defmac IRA_HARD_REGNO_ADD_COST_MULTIPLIER (@var{regno})
In some case register allocation order is not enough for the
Integrated Register Allocator (@acronym{IRA}) to generate a good code.
is @code{BITS_PER_WORD} bits wide is correct for your machine.
@end defmac
+@defmac SMALL_REGISTER_CLASSES
+On some machines, it is risky to let hard registers live across arbitrary
+insns. Typically, these machines have instructions that require values
+to be in specific registers (like an accumulator), and reload will fail
+if the required hard register is used for another purpose across such an
+insn.
+
+Define @code{SMALL_REGISTER_CLASSES} to be an expression with a nonzero
+value on these machines. When this macro has a nonzero value, the
+compiler will try to minimize the lifetime of hard registers.
+
+It is always safe to define this macro with a nonzero value, but if you
+unnecessarily define it, you will reduce the amount of optimizations
+that can be performed in some cases. If you do not define this macro
+with a nonzero value when it is required, the compiler will run out of
+spill registers and print a fatal error message. For most machines, you
+should not define this macro at all.
+@end defmac
+
@defmac CLASS_LIKELY_SPILLED_P (@var{class})
A C expression whose value is nonzero if pseudos that have been assigned
to registers of class @var{class} would likely be spilled because
must have move patterns for this mode.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P (enum machine_mode @var{mode})
-Define this to return nonzero for machine modes for which the port has
-small register classes. If this target hook returns nonzero for a given
-@var{mode}, the compiler will try to minimize the lifetime of registers
-in @var{mode}. The hook may be called with @code{VOIDmode} as argument.
-In this case, the hook is expected to return nonzero if it returns nonzero
-for any mode.
-
-On some machines, it is risky to let hard registers live across arbitrary
-insns. Typically, these machines have instructions that require values
-to be in specific registers (like an accumulator), and reload will fail
-if the required hard register is used for another purpose across such an
-insn.
-
-Passes before reload do not know which hard registers will be used
-in an instruction, but the machine modes of the registers set or used in
-the instruction are already known. And for some machines, register
-classes are small for, say, integer registers but not for floating point
-registers. For example, the AMD x86-64 architecture requires specific
-registers for the legacy x86 integer instructions, but there are many
-SSE registers for floating point operations. On such targets, a good
-strategy may be to return nonzero from this hook for @code{INTEGRAL_MODE_P}
-machine modes but zero for the SSE register classes.
-
-The default version of this hook retuns false for any mode. It is always
-safe to redefine this hook to return with a nonzero value. But if you
-unnecessarily define it, you will reduce the amount of optimizations
-that can be performed in some cases. If you do not define this hook
-to return a nonzero value when it is required, the compiler will run out
-of spill registers and print a fatal error message.
-@end deftypefn
-
@node Scalar Return
@subsection How Scalar Function Values Are Returned
@cindex return values in registers
If the machine has register windows, so that the caller and the called
function use different registers for the return value, this macro
should recognize only the caller's register numbers.
-
-This macro has been deprecated. Use @code{TARGET_FUNCTION_VALUE_REGNO_P}
-for a new target instead.
@end defmac
-@deftypefn {Target Hook} bool TARGET_FUNCTION_VALUE_REGNO_P (const unsigned int @var{regno})
-A target hook that return @code{true} if @var{regno} is the number of a hard
-register in which the values of called function may come back.
-
-A register whose use for returning values is limited to serving as the
-second of a pair (for a value of type @code{double}, say) need not be
-recognized by this target hook.
-
-If the machine has register windows, so that the caller and the called
-function use different registers for the return value, this target hook
-should recognize only the caller's register numbers.
-
-If this hook is not defined, then FUNCTION_VALUE_REGNO_P will be used.
-@end deftypefn
-
@defmac TARGET_ENUM_VA_LIST (@var{idx}, @var{pname}, @var{ptype})
This target macro is used in function @code{c_common_nodes_and_builtins}
to iterate through the target specific builtin types for va_list. The
address; but often a machine-dependent strategy can generate better code.
@end defmac
-@deftypefn {Target Hook} bool TARGET_MODE_DEPENDENT_ADDRESS_P (const_rtx @var{addr})
-This hook returns @code{true} if memory address @var{addr} can have
-different meanings depending on the machine mode of the memory
-reference it is used for or if the address is valid for some modes
-but not others.
-
-Autoincrement and autodecrement addresses typically have mode-dependent
-effects because the amount of the increment or decrement is the size
-of the operand being addressed. Some machines have other mode-dependent
-addresses. Many RISC machines have no mode-dependent addresses.
-
-You may assume that @var{addr} is a valid address for the machine.
-
-The default version of this hook returns @code{false}.
-@end deftypefn
-
@defmac GO_IF_MODE_DEPENDENT_ADDRESS (@var{addr}, @var{label})
A C statement or compound statement with a conditional @code{goto
@var{label};} executed if memory address @var{x} (an RTX) can have
addresses. Many RISC machines have no mode-dependent addresses.
You may assume that @var{addr} is a valid address for the machine.
-
-These are obsolete macros, replaced by the
-@code{TARGET_MODE_DEPENDENT_ADDRESS_P} target hook.
@end defmac
@defmac LEGITIMATE_CONSTANT_P (@var{x})
Return true if a vector created for @code{builtin_vec_perm} is valid.
@end deftypefn
-@deftypefn {Target Hook} tree TARGET_VECTORIZE_BUILTIN_CONVERSION (unsigned @var{code}, tree @var{dest_type}, tree @var{src_type})
+@deftypefn {Target Hook} tree TARGET_VECTORIZE_BUILTIN_CONVERSION (unsigned @var{code}, tree @var{type})
This hook should return the DECL of a function that implements conversion of the
-input vector of type @var{src_type} to type @var{dest_type}.
+input vector of type @var{type}.
+If @var{type} is an integral type, the result of the conversion is a vector of
+floating-point type of the same size.
+If @var{type} is a floating-point type, the result of the conversion is a vector
+of integral type of the same size.
The value of @var{code} is one of the enumerators in @code{enum tree_code} and
specifies how the conversion is to be applied
(truncation, rounding, etc.).
this function.
@end deftypefun
-@deftypefn {Target Hook} void TARGET_ASM_LTO_START (void)
-Output to @code{asm_out_file} any text which the assembler expects
-to find at the start of an LTO section. The default is to output
-nothing.
-@end deftypefn
-
-@deftypefn {Target Hook} void TARGET_ASM_LTO_END (void)
-Output to @code{asm_out_file} any text which the assembler expects
-to find at the end of an LTO section. The default is to output
-nothing.
-@end deftypefn
-
@deftypefn {Target Hook} void TARGET_ASM_CODE_END (void)
Output to @code{asm_out_file} any text which is needed before emitting
unwind info and debug info at the end of a file. Some targets emit
take.
@end deftypevr
-@deftypefn {Target Hook} bool TARGET_ATTRIBUTE_TAKES_IDENTIFIER_P (const_tree @var{name})
-If defined, this target hook is a function which returns true if the
-machine-specific attribute named @var{name} expects an identifier
-given as its first argument to be passed on as a plain identifier, not
-subjected to name lookup. If this is not defined, the default is
-false for all machine-specific attributes.
-@end deftypefn
-
@deftypefn {Target Hook} int TARGET_COMP_TYPE_ATTRIBUTES (const_tree @var{type1}, const_tree @var{type2})
If defined, this target hook is a function which returns zero if the attributes on
@var{type1} and @var{type2} are incompatible, one if they are compatible,
@var{arglist} really has type @samp{VEC(tree,gc)*}
@end deftypefn
-@deftypefn {Target Hook} tree TARGET_FOLD_BUILTIN (tree @var{fndecl}, int @var{n_args}, tree *@var{argp}, bool @var{ignore})
+@deftypefn {Target Hook} tree TARGET_FOLD_BUILTIN (tree @var{fndecl}, tree @var{arglist}, bool @var{ignore})
Fold a call to a machine specific built-in function that was set up by
@samp{TARGET_INIT_BUILTINS}. @var{fndecl} is the declaration of the
-built-in function. @var{n_args} is the number of arguments passed to
-the function; the arguments themselves are pointed to by @var{argp}.
-The result is another tree containing a simplified expression for the
-call's result. If @var{ignore} is true the value will be ignored.
+built-in function. @var{arglist} is the list of arguments passed to
+the built-in function. The result is another tree containing a
+simplified expression for the call's result. If @var{ignore} is true
+the value will be ignored.
@end deftypefn
@deftypefn {Target Hook} {const char *} TARGET_INVALID_WITHIN_DOLOOP (const_rtx @var{insn})
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