[PATCH] [ARC] Add support for naked functions.

[gcc.git] / gcc / config / arc / arc.h

diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
index eaf77f044eed55c220646dfee69ba4783c4c4c2b..53aacfe5ea8799ba1112e3eccba890c422d6c26a 100644 (file)
--- a/gcc/config/arc/arc.h
+++ b/gcc/config/arc/arc.h
@@ -1370,10 +1370,6 @@ do { \
 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) \
   arc_asm_output_aligned_decl_local (STREAM, DECL, NAME, SIZE, ALIGNMENT, 0)
 
-/* To translate the return value of arc_function_type into a register number
-   to jump through for function return.  */
-extern int arc_return_address_regs[5];
-
 /* Debugging information.  */
 
 /* Generate DBX and DWARF debugging information.  */
@@ -1506,22 +1502,38 @@ extern struct rtx_def *arc_compare_op0, *arc_compare_op1;
 
 /* ARC function types.   */
 enum arc_function_type {
-  ARC_FUNCTION_UNKNOWN, ARC_FUNCTION_NORMAL,
+  /* No function should have the unknown type.  This value is used to
+   indicate the that function type has not yet been computed.  */
+  ARC_FUNCTION_UNKNOWN  = 0,
+
+  /* The normal function type indicates that the function has the
+   standard prologue and epilogue.  */
+  ARC_FUNCTION_NORMAL  = 1 << 0,
   /* These are interrupt handlers.  The name corresponds to the register
      name that contains the return address.  */
-  ARC_FUNCTION_ILINK1, ARC_FUNCTION_ILINK2,
+  ARC_FUNCTION_ILINK1  = 1 << 1,
+  ARC_FUNCTION_ILINK2  = 1 << 2,
   /* Fast interrupt is only available on ARCv2 processors.  */
-  ARC_FUNCTION_FIRQ
+  ARC_FUNCTION_FIRQ    = 1 << 3,
+  /* The naked function type indicates that the function does not have
+   prologue or epilogue, and that no stack frame is available.  */
+  ARC_FUNCTION_NAKED   = 1 << 4
 };
-#define ARC_INTERRUPT_P(TYPE)                                          \
-  (((TYPE) == ARC_FUNCTION_ILINK1) || ((TYPE) == ARC_FUNCTION_ILINK2)  \
-   || ((TYPE) == ARC_FUNCTION_FIRQ))
 
-#define ARC_FAST_INTERRUPT_P(TYPE) ((TYPE) == ARC_FUNCTION_FIRQ)
+/* Check if a function is an interrupt function.  */
+#define ARC_INTERRUPT_P(TYPE)                                  \
+  (((TYPE) & (ARC_FUNCTION_ILINK1 | ARC_FUNCTION_ILINK2                \
+             | ARC_FUNCTION_FIRQ)) != 0)
+
+/* Check if a function is a fast interrupt function.  */
+#define ARC_FAST_INTERRUPT_P(TYPE) (((TYPE) & ARC_FUNCTION_FIRQ) != 0)
+
+/* Check if a function is normal, that is, has standard prologue and
+   epilogue.  */
+#define ARC_NORMAL_P(TYPE) (((TYPE) & ARC_FUNCTION_NORMAL) != 0)
 
-/* Compute the type of a function from its DECL.  Needed for EPILOGUE_USES.  */
-struct function;
-extern enum arc_function_type arc_compute_function_type (struct function *);
+/* Check if a function is naked.  */
+#define ARC_NAKED_P(TYPE) (((TYPE) & ARC_FUNCTION_NAKED) != 0)
 
 /* Called by crtstuff.c to make calls to function FUNCTION that are defined in
    SECTION_OP, and then to switch back to text section.  */