+2002-09-30 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/xtensa.h (REG_CLASS_NAMES, REG_CLASS_CONTENTS):
+ Add new RL_REGS register class.
+ (PREFERRED_RELOAD_CLASS, PREFERRED_OUTPUT_RELOAD_CLASS):
+ Call xtensa_preferred_reload_class for both input and output reloads.
+ * config/xtensa/xtensa.c (xtensa_regno_to_class): Use new RL_REGS class.
+ (xtensa_preferred_reload_class): Handle output reloads; use RL_REGS
+ instead of either AR_REGS or GR_REGS classes.
+ (xtensa_secondary_reload_class): Use new RL_REGS class.
+ * config/xtensa/xtensa-protos.h (xtensa_preferred_reload_class): Update.
+
2002-09-30 John David Anglin <dave@hiauly1.hia.nrc.ca>
* pa.c (hppa_encode_label): Don't drop '*' from function labels.
/* Prototypes of target machine for GNU compiler for Xtensa.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright 2001,2002 Free Software Foundation, Inc.
Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
This file is part of GCC.
extern rtx xtensa_return_addr PARAMS ((int, rtx));
extern rtx xtensa_builtin_saveregs PARAMS ((void));
extern enum reg_class xtensa_preferred_reload_class
- PARAMS ((rtx, enum reg_class));
+ PARAMS ((rtx, enum reg_class, int));
extern enum reg_class xtensa_secondary_reload_class
PARAMS ((enum reg_class, enum machine_mode, rtx, int));
extern int a7_overlap_mentioned_p PARAMS ((rtx x));
/* Subroutines for insn-output.c for Tensilica's Xtensa architecture.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright 2001,2002 Free Software Foundation, Inc.
Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
This file is part of GCC.
/* Map hard register number to register class */
const enum reg_class xtensa_regno_to_class[FIRST_PSEUDO_REGISTER] =
{
- GR_REGS, SP_REG, GR_REGS, GR_REGS,
- GR_REGS, GR_REGS, GR_REGS, GR_REGS,
- GR_REGS, GR_REGS, GR_REGS, GR_REGS,
- GR_REGS, GR_REGS, GR_REGS, GR_REGS,
+ RL_REGS, SP_REG, RL_REGS, RL_REGS,
+ RL_REGS, RL_REGS, RL_REGS, GR_REGS,
+ RL_REGS, RL_REGS, RL_REGS, RL_REGS,
+ RL_REGS, RL_REGS, RL_REGS, RL_REGS,
AR_REGS, AR_REGS, BR_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
enum reg_class
-xtensa_preferred_reload_class (x, class)
+xtensa_preferred_reload_class (x, class, isoutput)
rtx x;
enum reg_class class;
+ int isoutput;
{
- if (CONSTANT_P (x) && GET_CODE (x) == CONST_DOUBLE)
+ if (!isoutput && CONSTANT_P (x) && GET_CODE (x) == CONST_DOUBLE)
return NO_REGS;
- /* Don't use sp for reloads! */
- if (class == AR_REGS)
- return GR_REGS;
+ /* Don't use the stack pointer or hard frame pointer for reloads!
+ The hard frame pointer would normally be OK except that it may
+ briefly hold an incoming argument in the prologue, and reload
+ won't know that it is live because the hard frame pointer is
+ treated specially. */
+
+ if (class == AR_REGS || class == GR_REGS)
+ return RL_REGS;
return class;
}
if (!isoutput)
{
if (class == FP_REGS && constantpool_mem_p (x))
- return GR_REGS;
+ return RL_REGS;
}
if (ACC_REG_P (regno))
- return (class == GR_REGS ? NO_REGS : GR_REGS);
+ return ((class == GR_REGS || class == RL_REGS) ? NO_REGS : RL_REGS);
if (class == ACC_REG)
- return (GP_REG_P (regno) ? NO_REGS : GR_REGS);
+ return (GP_REG_P (regno) ? NO_REGS : RL_REGS);
return NO_REGS;
}
/* Definitions of Tensilica's Xtensa target machine for GNU compiler.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright 2001,2002 Free Software Foundation, Inc.
Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
This file is part of GCC.
FP_REGS, /* floating point registers */
ACC_REG, /* MAC16 accumulator */
SP_REG, /* sp register (aka a1) */
+ RL_REGS, /* preferred reload regs (not sp or fp) */
GR_REGS, /* integer registers except sp */
AR_REGS, /* all integer registers */
ALL_REGS, /* all registers */
"FP_REGS", \
"ACC_REG", \
"SP_REG", \
+ "RL_REGS", \
"GR_REGS", \
"AR_REGS", \
"ALL_REGS" \
{ 0xfff80000, 0x00000007 }, /* floating-point registers */ \
{ 0x00000000, 0x00000008 }, /* MAC16 accumulator */ \
{ 0x00000002, 0x00000000 }, /* stack pointer register */ \
+ { 0x0000ff7d, 0x00000000 }, /* preferred reload registers */ \
{ 0x0000fffd, 0x00000000 }, /* general-purpose registers */ \
{ 0x0003ffff, 0x00000000 }, /* integer registers */ \
{ 0xffffffff, 0x0000000f } /* all registers */ \
: FALSE)
#define PREFERRED_RELOAD_CLASS(X, CLASS) \
- xtensa_preferred_reload_class (X, CLASS)
+ xtensa_preferred_reload_class (X, CLASS, 0)
#define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
- (CLASS)
+ xtensa_preferred_reload_class (X, CLASS, 1)
#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
xtensa_secondary_reload_class (CLASS, MODE, X, 0)