+2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
+ Bernd Edlinger <bernd.edlinger@hotmail.de>
+ Jakub Jelinek <jakub@redhat.com>
+
+ PR target/89093
+ * config/arm/arm.c (aapcs_vfp_is_call_or_return_candidate): Diagnose
+ if used with general-regs-only.
+ (arm_conditional_register_usage): Don't add non-general regs if
+ general-regs-only.
+ (arm_valid_target_attribute_rec): Handle general-regs-only.
+ * config/arm/arm.h (TARGET_HARD_FLOAT): Return false if
+ general-regs-only.
+ (TARGET_HARD_FLOAT_SUB): Define.
+ (TARGET_SOFT_FLOAT): Define as negation of TARGET_HARD_FLOAT_SUB.
+ (TARGET_REALLY_IWMMXT): Add && !TARGET_GENERAL_REGS_ONLY.
+ (TARGET_REALLY_IWMMXT2): Likewise.
+ * config/arm/arm.opt: Add -mgeneral-regs-only.
+ * doc/extend.texi: Document ARM general-regs-only target.
+ * doc/invoke.texi: Document ARM -mgeneral-regs-only.
+
2019-04-23 Bin Cheng <bin.cheng@linux.alibaba.com>
PR tree-optimization/90078
return false;
*base_mode = new_mode;
+
+ if (TARGET_GENERAL_REGS_ONLY)
+ error ("argument of type %qT not permitted with -mgeneral-regs-only",
+ type);
+
return true;
}
}
}
- if (TARGET_REALLY_IWMMXT)
+ if (TARGET_REALLY_IWMMXT && !TARGET_GENERAL_REGS_ONLY)
{
regno = FIRST_IWMMXT_GR_REGNUM;
/* The 2002/10/09 revision of the XScale ABI has wCG0
else if (!strcmp (q, "arm"))
opts->x_target_flags &= ~MASK_THUMB;
+ else if (!strcmp (q, "general-regs-only"))
+ opts->x_target_flags |= MASK_GENERAL_REGS_ONLY;
+
else if (!strncmp (q, "fpu=", 4))
{
int fpu_index;
#define TARGET_32BIT_P(flags) (TARGET_ARM_P (flags) || TARGET_THUMB2_P (flags))
/* Run-time Target Specification. */
-/* Use hardware floating point instructions. */
-#define TARGET_HARD_FLOAT (arm_float_abi != ARM_FLOAT_ABI_SOFT \
+/* Use hardware floating point instructions. -mgeneral-regs-only prevents
+the use of floating point instructions and registers but does not prevent
+emission of floating point pcs attributes. */
+#define TARGET_HARD_FLOAT_SUB (arm_float_abi != ARM_FLOAT_ABI_SOFT \
&& bitmap_bit_p (arm_active_target.isa, \
isa_bit_vfpv2) \
&& TARGET_32BIT)
-#define TARGET_SOFT_FLOAT (!TARGET_HARD_FLOAT)
+
+#define TARGET_HARD_FLOAT (TARGET_HARD_FLOAT_SUB \
+ && !TARGET_GENERAL_REGS_ONLY)
+
+#define TARGET_SOFT_FLOAT (!TARGET_HARD_FLOAT_SUB)
/* User has permitted use of FP instructions, if they exist for this
target. */
#define TARGET_MAYBE_HARD_FLOAT (arm_float_abi != ARM_FLOAT_ABI_SOFT)
#define TARGET_HARD_FLOAT_ABI (arm_float_abi == ARM_FLOAT_ABI_HARD)
#define TARGET_IWMMXT (arm_arch_iwmmxt)
#define TARGET_IWMMXT2 (arm_arch_iwmmxt2)
-#define TARGET_REALLY_IWMMXT (TARGET_IWMMXT && TARGET_32BIT)
-#define TARGET_REALLY_IWMMXT2 (TARGET_IWMMXT2 && TARGET_32BIT)
+#define TARGET_REALLY_IWMMXT (TARGET_IWMMXT && TARGET_32BIT \
+ && !TARGET_GENERAL_REGS_ONLY)
+#define TARGET_REALLY_IWMMXT2 (TARGET_IWMMXT2 && TARGET_32BIT \
+ && !TARGET_GENERAL_REGS_ONLY)
#define TARGET_IWMMXT_ABI (TARGET_32BIT && arm_abi == ARM_ABI_IWMMXT)
#define TARGET_ARM (! TARGET_THUMB)
#define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */
mbranch-cost=
Target RejectNegative Joined UInteger Var(arm_branch_cost) Init(-1)
Cost to assume for a branch insn.
+
+mgeneral-regs-only
+Target Report RejectNegative Mask(GENERAL_REGS_ONLY) Save
+Generate code which uses the core registers only (r0-r14).
These function attributes are supported for ARM targets:
@table @code
+
+@item general-regs-only
+@cindex @code{general-regs-only} function attribute, ARM
+Indicates that no floating-point or Advanced SIMD registers should be
+used when generating code for this function. If the function explicitly
+uses floating-point code, then the compiler gives an error. This is
+the same behavior as that of the command-line option
+@option{-mgeneral-regs-only}.
+
@item interrupt
@cindex @code{interrupt} function attribute, ARM
Use this attribute to indicate
-mabi=@var{name} @gol
-mapcs-stack-check -mno-apcs-stack-check @gol
-mapcs-reentrant -mno-apcs-reentrant @gol
+-mgeneral-regs-only @gol
-msched-prolog -mno-sched-prolog @gol
-mlittle-endian -mbig-endian @gol
-mbe8 -mbe32 @gol
compile your entire program with the same ABI, and link with a
compatible set of libraries.
+@item -mgeneral-regs-only
+@opindex mgeneral-regs-only
+Generate code which uses only the general-purpose registers. This will prevent
+the compiler from using floating-point and Advanced SIMD registers but will not
+impose any restrictions on the assembler.
+
@item -mlittle-endian
@opindex mlittle-endian
Generate code for a processor running in little-endian mode. This is
+2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
+ Bernd Edlinger <bernd.edlinger@hotmail.de>
+ Jakub Jelinek <jakub@redhat.com>
+
+ PR target/89093
+ * config/arm/pr-support.c: Add #pragma GCC target("general-regs-only").
+ * config/arm/unwind-arm.c: Likewise.
+ * unwind-c.c (PERSONALITY_FUNCTION): Add general-regs-only target
+ attribute for ARM.
+
2019-04-15 Monk Chiang <sh.chiang04@gmail.com>
* config/nds32/linux-unwind.h (SIGRETURN): Remove.
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
+#pragma GCC target ("general-regs-only")
#include "unwind.h"
/* We add a prototype for abort here to avoid creating a dependency on
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
+#pragma GCC target ("general-regs-only")
#include "unwind.h"
/* Misc constants. */
struct _Unwind_Context *);
_Unwind_Reason_Code
+__attribute__((target ("general-regs-only")))
PERSONALITY_FUNCTION (_Unwind_State state,
struct _Unwind_Exception * ue_header,
struct _Unwind_Context * context)
+2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
+ Bernd Edlinger <bernd.edlinger@hotmail.de>
+ Jakub Jelinek <jakub@redhat.com>
+
+ PR target/89093
+ * exception.c (PERSONALITY_FUNCTION): Add general-regs-only target
+ attribute for ARM.
+
2019-03-06 Uroš Bizjak <ubizjak@gmail.com>
* encoding.c (DFmode): #undef before #define.
while (0)
_Unwind_Reason_Code
+__attribute__((target ("general-regs-only")))
PERSONALITY_FUNCTION (_Unwind_State state,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
+2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
+ Bernd Edlinger <bernd.edlinger@hotmail.de>
+ Jakub Jelinek <jakub@redhat.com>
+
+ PR target/89093
+ * libdruntime/gcc/deh.d: Import gcc.attribute.
+ (personality_fn_attributes): New enum.
+ (scanLSDA, CONTINUE_UNWINDING, gdc_personality, __gdc_personality):
+ Add @personality_fn_attributes.
+
2019-04-20 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/89293
import gcc.unwind.pe;
import gcc.builtins;
import gcc.config;
+import gcc.attribute;
extern(C)
{
terminate("unwind error", __LINE__);
}
+static if (GNU_ARM_EABI_Unwinder)
+{
+ enum personality_fn_attributes = attribute("target", ("general-regs-only"));
+}
+else
+{
+ enum personality_fn_attributes = "";
+}
/**
* Read and extract information from the LSDA (.gcc_except_table section).
*/
+@personality_fn_attributes
_Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class exceptionClass,
_Unwind_Action actions, _Unwind_Exception* unwindHeader,
_Unwind_Context* context, _Unwind_Word cfa,
* Called when the personality function has found neither a cleanup or handler.
* To support ARM EABI personality routines, that must also unwind the stack.
*/
+@personality_fn_attributes
_Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader, _Unwind_Context* context)
{
static if (GNU_ARM_EABI_Unwinder)
static if (GNU_ARM_EABI_Unwinder)
{
pragma(mangle, PERSONALITY_FUNCTION)
+ @personality_fn_attributes
extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
}
}
+@personality_fn_attributes
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class exceptionClass,
_Unwind_Exception* unwindHeader,
+2019-04-23 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
+ Bernd Edlinger <bernd.edlinger@hotmail.de>
+ Jakub Jelinek <jakub@redhat.com>
+
+ PR target/89093
+ * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
+ general-regs-only target attribute for ARM.
+
2019-04-23 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/87431
#endif
_Unwind_Reason_Code
#ifdef __ARM_EABI_UNWINDER__
+__attribute__((target ("general-regs-only")))
PERSONALITY_FUNCTION (_Unwind_State state,
struct _Unwind_Exception* ue_header,
struct _Unwind_Context* context)
projects / gcc.git / commitdiff