-@c Copyright (C) 1988-2018 Free Software Foundation, Inc.
+@c Copyright (C) 1988-2020 Free Software Foundation, Inc.
@c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi.
* MIPS Coprocessors:: MIPS coprocessor support and how to customize it.
* PCH Target:: Validity checking for precompiled headers.
* C++ ABI:: Controlling C++ ABI changes.
+* D Language and ABI:: Controlling D ABI changes.
* Named Address Spaces:: Adding support for named address spaces
* Misc:: Everything else.
@end menu
@code{target_has_targetm_common=yes} in @file{config.gcc}; otherwise a
default definition is used.
+Similarly, there is a @code{targetdm} variable for hooks that are
+specific to the D language front end, documented as ``D Target Hook''.
+This is declared in @file{d/d-target.h}, the initializer
+@code{TARGETDM_INITIALIZER} in @file{d/d-target-def.h}. If targets
+initialize @code{targetdm} themselves, they should set
+@code{target_has_targetdm=yes} in @file{config.gcc}; otherwise a default
+definition is used.
+
@node Driver
@section Controlling the Compilation Driver, @file{gcc}
@cindex driver
@hook TARGET_OPTION_INIT_STRUCT
-@hook TARGET_OPTION_DEFAULT_PARAMS
-
@defmac SWITCHABLE_TARGET
Some targets need to switch between substantially different subtargets
during compilation. For example, the MIPS target has one subtarget for
@defmac MAX_OFILE_ALIGNMENT
Biggest alignment supported by the object file format of this machine.
Use this macro to limit the alignment which can be specified using the
-@code{__attribute__ ((aligned (@var{n})))} construct. If not defined,
-the default value is @code{BIGGEST_ALIGNMENT}.
+@code{__attribute__ ((aligned (@var{n})))} construct for functions and
+objects with static storage duration. The alignment of automatic
+objects may exceed the object file format maximum up to the maximum
+supported by GCC. If not defined, the default value is
+@code{BIGGEST_ALIGNMENT}.
On systems that use ELF, the default (in @file{config/elfos.h}) is
the largest supported 32-bit ELF section alignment representable on
-a 32-bit host e.g. @samp{(((uint64_t) 1 << 28) * 8)}.
+a 32-bit host e.g.@: @samp{(((uint64_t) 1 << 28) * 8)}.
On 32-bit ELF the largest supported section alignment in bits is
@samp{(0x80000000 * 8)}, but this is not representable on 32-bit hosts.
@end defmac
If a register has 0 in @code{CALL_USED_REGISTERS}, the compiler
automatically saves it on function entry and restores it on function
exit, if the register is used within the function.
+
+Exactly one of @code{CALL_USED_REGISTERS} and @code{CALL_REALLY_USED_REGISTERS}
+must be defined. Modern ports should define @code{CALL_REALLY_USED_REGISTERS}.
@end defmac
@defmac CALL_REALLY_USED_REGISTERS
Like @code{CALL_USED_REGISTERS} except this macro doesn't require
that the entire set of @code{FIXED_REGISTERS} be included.
(@code{CALL_USED_REGISTERS} must be a superset of @code{FIXED_REGISTERS}).
-This macro is optional. If not specified, it defaults to the value
-of @code{CALL_USED_REGISTERS}.
+
+Exactly one of @code{CALL_USED_REGISTERS} and @code{CALL_REALLY_USED_REGISTERS}
+must be defined. Modern ports should define @code{CALL_REALLY_USED_REGISTERS}.
@end defmac
+@cindex call-used register
+@cindex call-clobbered register
+@cindex call-saved register
+@hook TARGET_FNTYPE_ABI
+
+@hook TARGET_INSN_CALLEE_ABI
+
@cindex call-used register
@cindex call-clobbered register
@cindex call-saved register
@hook TARGET_HARD_REGNO_CALL_PART_CLOBBERED
+@hook TARGET_GET_MULTILIB_ABI_NAME
+
@findex fixed_regs
@findex call_used_regs
@findex global_regs
normally not need to override that default.
@end defmac
-@hook TARGET_STACK_CLASH_PROTECTION_FINAL_DYNAMIC_PROBE
+@hook TARGET_STACK_CLASH_PROTECTION_ALLOCA_PROBE_RANGE
@need 2000
@node Frame Registers
@hook TARGET_STORE_RETURNED_BOUNDS
-@hook TARGET_SETUP_INCOMING_VARARG_BOUNDS
-
@node Trampolines
@section Support for Nested Functions
@cindex support for nested functions
@hook TARGET_LIBC_HAS_FUNCTION
+@hook TARGET_LIBC_HAS_FAST_FUNCTION
+
@defmac NEXT_OBJC_RUNTIME
Set this macro to 1 to use the "NeXT" Objective-C message sending conventions
by default. This calling convention involves passing the object, the selector
@hook TARGET_VECTORIZE_VEC_PERM_CONST
-@hook TARGET_VECTORIZE_BUILTIN_CONVERSION
-
@hook TARGET_VECTORIZE_BUILTIN_VECTORIZED_FUNCTION
@hook TARGET_VECTORIZE_BUILTIN_MD_VECTORIZED_FUNCTION
@hook TARGET_VECTORIZE_SPLIT_REDUCTION
-@hook TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_SIZES
+@hook TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES
+
+@hook TARGET_VECTORIZE_RELATED_MODE
@hook TARGET_VECTORIZE_GET_MASK_MODE
@hook TARGET_SIMT_VF
+@hook TARGET_OMP_DEVICE_KIND_ARCH_ISA
+
@hook TARGET_GOACC_VALIDATE_DIMS
@hook TARGET_GOACC_DIM_LIMIT
branch instruction must be used for some conditional branches. When
this happens, use the machine mode of the condition code register to
record different formats of the condition code register. Modes can
-also be used to record which compare instruction (e.g. a signed or an
+also be used to record which compare instruction (e.g.@: a signed or an
unsigned comparison) produced the condition codes.
If other modes than @code{CCmode} are required, add them to
the jump-table.
@end defmac
+@hook TARGET_ASM_POST_CFI_STARTPROC
+
@hook TARGET_ASM_EMIT_UNWIND_LABEL
@hook TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL
@defmac ASM_OUTPUT_DWARF_VMS_DELTA (@var{stream}, @var{size}, @var{label1}, @var{label2})
A C statement to issue assembly directives that create a difference
-between the two given labels in system defined units, e.g. instruction
+between the two given labels in system defined units, e.g.@: instruction
slots on IA64 VMS, using an integer of the given size.
@end defmac
@hook TARGET_INSERT_ATTRIBUTES
+@hook TARGET_HANDLE_GENERIC_ATTRIBUTE
+
@hook TARGET_FUNCTION_ATTRIBUTE_INLINABLE_P
@hook TARGET_OPTION_VALID_ATTRIBUTE_P
@hook TARGET_CXX_DECL_MANGLING_CONTEXT
+@node D Language and ABI
+@section D ABI parameters
+@cindex parameters, d abi
+
+@hook TARGET_D_CPU_VERSIONS
+
+@hook TARGET_D_OS_VERSIONS
+
+@hook TARGET_D_CRITSEC_SIZE
+
@node Named Address Spaces
@section Adding support for named address spaces
@cindex named address spaces
@hook TARGET_MODE_REP_EXTENDED
+@hook TARGET_SETJMP_PRESERVES_NONVOLATILE_REGS_P
+
@defmac STORE_FLAG_VALUE
A C expression describing the value returned by a comparison operator
with an integral mode and stored by a store-flag instruction
@hook TARGET_RESOLVE_OVERLOADED_BUILTIN
+@hook TARGET_CHECK_BUILTIN_CALL
+
@hook TARGET_FOLD_BUILTIN
@hook TARGET_GIMPLE_FOLD_BUILTIN
@hook TARGET_GENERATE_VERSION_DISPATCHER_BODY
+@hook TARGET_PREDICT_DOLOOP_P
+
+@hook TARGET_HAVE_COUNT_REG_DECR_P
+
+@hook TARGET_DOLOOP_COST_FOR_GENERIC
+
+@hook TARGET_DOLOOP_COST_FOR_ADDRESS
+
@hook TARGET_CAN_USE_DOLOOP_P
@hook TARGET_INVALID_WITHIN_DOLOOP
lists.
@end defmac
-@defmac MODIFY_JNI_METHOD_CALL (@var{mdecl})
-Define this macro to a C expression representing a variant of the
-method call @var{mdecl}, if Java Native Interface (JNI) methods
-must be invoked differently from other methods on your target.
-For example, on 32-bit Microsoft Windows, JNI methods must be invoked using
-the @code{stdcall} calling convention and this macro is then
-defined as this expression:
-
-@smallexample
-build_type_attribute_variant (@var{mdecl},
- build_tree_list
- (get_identifier ("stdcall"),
- NULL))
-@end smallexample
-@end defmac
-
@hook TARGET_CANNOT_MODIFY_JUMPS_P
-@hook TARGET_BRANCH_TARGET_REGISTER_CLASS
-
-@hook TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED
-
@hook TARGET_HAVE_CONDITIONAL_EXECUTION
@hook TARGET_GEN_CCMP_FIRST
@hook TARGET_CONVERT_TO_TYPE
+@hook TARGET_VERIFY_TYPE_CONTEXT
+
@defmac OBJC_JBLEN
This macro determines the size of the objective C jump buffer for the
NeXT runtime. By default, OBJC_JBLEN is defined to an innocuous value.
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