Enable special code to work around file systems which only permit very

Enable special code to work around file systems which only permit very

short file names, such as MS-DOS@.

short file names, such as MS-DOS@.

@itemx --target-help

@itemx --target-help

@opindex help

@opindex help

@opindex target-help

@opindex target-help

instruction. Pointers to this address space are 16 bits wide.

instruction. Pointers to this address space are 16 bits wide.

@item __flash1

@item __flash1

@cindex @code{__flash1} AVR Named Address Spaces

@cindex @code{__flash1} AVR Named Address Spaces

@cindex @code{__flash2} AVR Named Address Spaces

@cindex @code{__flash2} AVR Named Address Spaces

@cindex @code{__flash3} AVR Named Address Spaces

@cindex @code{__flash3} AVR Named Address Spaces

not matter.  The type of the operands and that of the result are

not matter.  The type of the operands and that of the result are

always of @code{BOOLEAN_TYPE} or @code{INTEGER_TYPE}.

always of @code{BOOLEAN_TYPE} or @code{INTEGER_TYPE}.

This node represents pointer arithmetic.  The first operand is always

This node represents pointer arithmetic.  The first operand is always

a pointer/reference type.  The second operand is always an unsigned

a pointer/reference type.  The second operand is always an unsigned

integer type compatible with sizetype.  This is the only binary

integer type compatible with sizetype.  This is the only binary

arithmetic operand that can operate on pointer types.

arithmetic operand that can operate on pointer types.

@itemx MINUS_EXPR

@itemx MINUS_EXPR

@itemx MULT_EXPR

@itemx MULT_EXPR

These nodes represent various binary arithmetic operations.

These nodes represent various binary arithmetic operations.

this will become the default.  The name @samp{gnu9x} is deprecated.

this will become the default.  The name @samp{gnu9x} is deprecated.

@item gnu11

@item gnu11

GNU dialect of ISO C11.  Support is incomplete and experimental.  The

GNU dialect of ISO C11.  Support is incomplete and experimental.  The

name @samp{gnu1x} is deprecated.

name @samp{gnu1x} is deprecated.

For example, with @option{-fdbg-cnt=dce:10,tail_call:0},

For example, with @option{-fdbg-cnt=dce:10,tail_call:0},

@code{dbg_cnt(dce)} returns true only for first 10 invocations.

@code{dbg_cnt(dce)} returns true only for first 10 invocations.

@itemx -fdisable-@var{kind}-@var{pass}=@var{range-list}

@itemx -fdisable-@var{kind}-@var{pass}=@var{range-list}

@opindex fdisable-

@opindex fdisable-

@opindex fenable-

@opindex fenable-

@option{-fdump-rtl-ce3} enable dumping after the three

@option{-fdump-rtl-ce3} enable dumping after the three

if conversion passes.

if conversion passes.

@opindex fdump-rtl-cprop_hardreg

@opindex fdump-rtl-cprop_hardreg

Dump after hard register copy propagation.

Dump after hard register copy propagation.

@opindex fdump-rtl-csa

@opindex fdump-rtl-csa

Dump after combining stack adjustments.

Dump after combining stack adjustments.

@option{-fdump-rtl-cse1} and @option{-fdump-rtl-cse2} enable dumping after

@option{-fdump-rtl-cse1} and @option{-fdump-rtl-cse2} enable dumping after

the two common subexpression elimination passes.

the two common subexpression elimination passes.

@opindex fdump-rtl-dce

@opindex fdump-rtl-dce

Dump after the standalone dead code elimination passes.

Dump after the standalone dead code elimination passes.

@opindex fdump-rtl-dbr

@opindex fdump-rtl-dbr

Dump after delayed branch scheduling.

Dump after delayed branch scheduling.

@opindex fdump-rtl-initvals

@opindex fdump-rtl-initvals

Dump after the computation of the initial value sets.

Dump after the computation of the initial value sets.

@opindex fdump-rtl-into_cfglayout

@opindex fdump-rtl-into_cfglayout

Dump after converting to cfglayout mode.

Dump after converting to cfglayout mode.

@opindex fdump-rtl-rnreg

@opindex fdump-rtl-rnreg

Dump after register renumbering.

Dump after register renumbering.

@opindex fdump-rtl-outof_cfglayout

@opindex fdump-rtl-outof_cfglayout

Dump after converting from cfglayout mode.

Dump after converting from cfglayout mode.

The default is @option{-mfp-mode=caller}

The default is @option{-mfp-mode=caller}

@item -mnosplit-lohi

@item -mnosplit-lohi

@opindex mnosplit-lohi

@opindex mnosplit-lohi

@opindex mno-postinc

@opindex mno-postinc

@opindex mno-postmodify

@opindex mno-postmodify

Code generation tweaks that disable, respectively, splitting of 32-bit

Code generation tweaks that disable, respectively, splitting of 32-bit

loads, generation of post-increment addresses, and generation of

loads, generation of post-increment addresses, and generation of

Do not assume that unaligned memory references will be handled by the system.

Do not assume that unaligned memory references will be handled by the system.

@item -momit-leaf-frame-pointer

@item -momit-leaf-frame-pointer

@opindex momit-leaf-frame-pointer

@opindex momit-leaf-frame-pointer

@opindex mno-omit-leaf-frame-pointer

@opindex mno-omit-leaf-frame-pointer

Omit or keep the frame pointer in leaf functions.  The former behaviour is the

Omit or keep the frame pointer in leaf functions.  The former behaviour is the

memory.

memory.

@item __AVR_HAVE_EIJMP_EICALL__

@item __AVR_HAVE_EIJMP_EICALL__

The device has the @code{EIJMP} and @code{EICALL} instructions.

The device has the @code{EIJMP} and @code{EICALL} instructions.

This is the case for devices with more than 128@tie{}KiB of program memory.

This is the case for devices with more than 128@tie{}KiB of program memory.

This also means that the program counter

This also means that the program counter

with up to 128@tie{}KiB of program memory.

with up to 128@tie{}KiB of program memory.

@item __AVR_HAVE_8BIT_SP__

@item __AVR_HAVE_8BIT_SP__

The stack pointer (SP) register is treated as 8-bit respectively

The stack pointer (SP) register is treated as 8-bit respectively

16-bit register by the compiler.

16-bit register by the compiler.

The definition of these macros is affected by @code{-mtiny-stack}.

The definition of these macros is affected by @code{-mtiny-stack}.

@item __AVR_HAVE_SPH__

@item __AVR_HAVE_SPH__

The device has the SPH (high part of stack pointer) special function

The device has the SPH (high part of stack pointer) special function

register or has an 8-bit stack pointer, respectively.

register or has an 8-bit stack pointer, respectively.

The definition of these macros is affected by @code{-mmcu=} and

The definition of these macros is affected by @code{-mmcu=} and

by @code{-msp8}.

by @code{-msp8}.

@item __AVR_HAVE_RAMPD__

@item __AVR_HAVE_RAMPD__

The device has the @code{RAMPD}, @code{RAMPX}, @code{RAMPY},

The device has the @code{RAMPD}, @code{RAMPX}, @code{RAMPY},

@code{RAMPZ} special function register, respectively.

@code{RAMPZ} special function register, respectively.

This macro reflects the @code{-mno-interrupts} command line option.

This macro reflects the @code{-mno-interrupts} command line option.

@item __AVR_ERRATA_SKIP__

@item __AVR_ERRATA_SKIP__

Some AVR devices (AT90S8515, ATmega103) must not skip 32-bit

Some AVR devices (AT90S8515, ATmega103) must not skip 32-bit

instructions because of a hardware erratum.  Skip instructions are

instructions because of a hardware erratum.  Skip instructions are

@code{SBRS}, @code{SBRC}, @code{SBIS}, @code{SBIC} and @code{CPSE}.

@code{SBRS}, @code{SBRC}, @code{SBIS}, @code{SBIC} and @code{CPSE}.

@option{-mhitachi} is given.

@option{-mhitachi} is given.

@item -mieee

@item -mieee

@opindex mieee

@opindex mieee

@opindex mnoieee

@opindex mnoieee

Control the IEEE compliance of floating-point comparisons, which affects the

Control the IEEE compliance of floating-point comparisons, which affects the

@cindex @code{ior@var{m}3} instruction pattern

@cindex @code{ior@var{m}3} instruction pattern

@cindex @code{xor@var{m}3} instruction pattern

@cindex @code{xor@var{m}3} instruction pattern

@item @samp{ssadd@var{m}3}, @samp{usadd@var{m}3}

@item @samp{ssadd@var{m}3}, @samp{usadd@var{m}3}

@itemx @samp{div@var{m}3}, @samp{ssdiv@var{m}3}

@itemx @samp{div@var{m}3}, @samp{ssdiv@var{m}3}

@itemx @samp{udiv@var{m}3}, @samp{usdiv@var{m}3}

@itemx @samp{udiv@var{m}3}, @samp{usdiv@var{m}3}

@itemx @samp{mod@var{m}3}, @samp{umod@var{m}3}

@itemx @samp{mod@var{m}3}, @samp{umod@var{m}3}

@code{lang_checks}.

@code{lang_checks}.

@table @code

@table @code

@itemx start.encap

@itemx start.encap

@itemx rest.encap

@itemx rest.encap

FIXME: exactly what goes in each of these targets?

FIXME: exactly what goes in each of these targets?