/* Register note definitions.
- Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
This file is part of GCC.
substitution; but it can be used for cse. */
REG_NOTE (EQUAL)
-/* This insn copies the return-value of a library call out of the hard
- reg for return values. This note is actually an INSN_LIST and it
- points to the first insn involved in setting up arguments for the
- call. flow.c uses this to delete the entire library call when its
- result is dead. */
-REG_NOTE (RETVAL)
-
-/* The inverse of REG_RETVAL: it goes on the first insn of the library
- call and points at the one that has the REG_RETVAL. This note is
- also an INSN_LIST. */
-REG_NOTE (LIBCALL)
-
/* The register is always nonnegative during the containing loop.
This is used in branches so that decrement and branch instructions
terminating on zero can be matched. There must be an insn pattern
will never be added to any instructions. */
REG_NOTE (NONNEG)
-/* There is no conflict *after this insn* between the register in the
- note and the destination of this insn. */
-REG_NOTE (NO_CONFLICT)
-
/* Identifies a register set in this insn and never used. */
REG_NOTE (UNUSED)
REG_NOTE (CC_SETTER)
REG_NOTE (CC_USER)
-/* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
- CODE_LABEL contained in the REG_LABEL note is used by the insn.
- This note is an INSN_LIST. */
-REG_NOTE (LABEL)
+/* Points to a CODE_LABEL. Used by JUMP_INSNs to say that the CODE_LABEL
+ contained in the REG_LABEL_TARGET note is a possible jump target of
+ this insn. This note is an INSN_LIST. */
+REG_NOTE (LABEL_TARGET)
+
+/* Points to a CODE_LABEL. Used by any insn to say that the CODE_LABEL
+ contained in the REG_LABEL_OPERAND note is used by the insn, but as an
+ operand, not as a jump target (though it may indirectly be a jump
+ target for a later jump insn). This note is an INSN_LIST. */
+REG_NOTE (LABEL_OPERAND)
/* REG_DEP_OUTPUT and REG_DEP_ANTI are used in scheduler dependencies lists
to represent write-after-write and write-after-read dependencies
won't return. */
REG_NOTE (BR_PROB)
-/* REG_VALUE_PROFILE is attached when the profile is read in to an
- insn before that the code to profile the value is inserted. It
- contains the results of profiling. */
-REG_NOTE (VALUE_PROFILE)
-
/* Attached to a call insn; indicates that the call is malloc-like and
that the pointer returned cannot alias anything else. */
REG_NOTE (NOALIAS)
instead of intuition. */
REG_NOTE (FRAME_RELATED_EXPR)
+/* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
+ for FRAME_RELATED_EXPR intuition. The insn's first pattern must be
+ a SET, and the destination must be the CFA register. The attached
+ rtx is an expression that defines the CFA. In the simplest case, the
+ rtx could be just the stack_pointer_rtx; more common would be a PLUS
+ with a base register and a constant offset. In the most complicated
+ cases, this will result in a DW_CFA_def_cfa_expression with the rtx
+ expression rendered in a dwarf location expression. */
+REG_NOTE (CFA_DEF_CFA)
+
+/* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
+ for FRAME_RELATED_EXPR intuition. This note adjusts the expression
+ from which the CFA is computed. The attached rtx defines a new CFA
+ expression, relative to the old CFA expression. This rtx must be of
+ the form (SET new-cfa-reg (PLUS old-cfa-reg const_int)). If the note
+ rtx is NULL, we use the first SET of the insn. */
+REG_NOTE (CFA_ADJUST_CFA)
+
+/* Similar to FRAME_RELATED_EXPR, with the additional information that
+ this is a save to memory, i.e. will result in DW_CFA_offset or the
+ like. The pattern or the insn should be a simple store relative to
+ the CFA. */
+REG_NOTE (CFA_OFFSET)
+
+/* Similar to FRAME_RELATED_EXPR, with the additional information that this
+ is a save to a register, i.e. will result in DW_CFA_register. The insn
+ or the pattern should be simple reg-reg move. */
+REG_NOTE (CFA_REGISTER)
+
+/* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
+ for FRAME_RELATED_EXPR intuition. This is a save to memory, i.e. will
+ result in a DW_CFA_expression. The pattern or the insn should be a
+ store of a register to an arbitrary (non-validated) memory address. */
+REG_NOTE (CFA_EXPRESSION)
+
+/* Attached to insns that are RTX_FRAME_RELATED_P, with the information
+ that this is a restore operation, i.e. will result in DW_CFA_restore
+ or the like. Either the attached rtx, or the destination of the insn's
+ first pattern is the register to be restored. */
+REG_NOTE (CFA_RESTORE)
+
+/* Attached to insn that is RTX_FRAME_RELATED_P, marks insn that sets
+ vDRAP from DRAP. If vDRAP is a register, vdrap_reg is initalized
+ to the argument, if it is a MEM, it is ignored. */
+REG_NOTE (CFA_SET_VDRAP)
+
/* Indicates that REG holds the exception context for the function.
This context is shared by inline functions, so the code to acquire
the real exception context is delayed until after inlining. */
/* This kind of note is generated at each to `setjmp', and similar
functions that can return twice. */
REG_NOTE (SETJMP)
-
-/* This kind of note identifies what libcall id an instruction is part of. */
-REG_NOTE (LIBCALL_ID)
-
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