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rtl.h: (HARD_FRAME_POINTER_REGNUM): New macro.

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* rtl.h: (HARD_FRAME_POINTER_REGNUM): New macro.
(hard_frame_pointer_rtx): New variable

From-SVN: r5449
This commit is contained in:
Doug Evans 1993-09-24 19:36:23 +00:00
parent fe089a905a
commit 3ba7165675
1 changed files with 11 additions and 0 deletions
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11
gcc/rtl.h
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@ -826,6 +826,7 @@ extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
go through these unique rtx objects. */
extern rtx stack_pointer_rtx;
extern rtx frame_pointer_rtx;
extern rtx hard_frame_pointer_rtx;
extern rtx arg_pointer_rtx;
extern rtx pic_offset_table_rtx;
extern rtx struct_value_rtx;
@ -833,6 +834,16 @@ extern rtx struct_value_incoming_rtx;
extern rtx static_chain_rtx;
extern rtx static_chain_incoming_rtx;
/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
is used to represent the frame pointer. This is because the
hard frame pointer and the automatic variables are separated by an amount
that cannot be determined until after register allocation. We can assume
that in this case ELIMINABLE_REGS will be defined, one action of which
will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
#ifndef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
#endif
/* Virtual registers are used during RTL generation to refer to locations into
the stack frame when the actual location isn't known until RTL generation
is complete. The routine instantiate_virtual_regs replaces these with