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c4x.c (c4x_hard_regno_rename_ok): New.

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* c4x.c (c4x_hard_regno_rename_ok): New.
	* c4x-protos.h (c4x_hard_regno_rename_ok): New.
	* c4x.h (HARD_REGNO_RENAME_OK): Define.

From-SVN: r39419
This commit is contained in:
Herman A.J. ten Brugge 2001-02-03 02:25:03 +01:00 committed by Michael Hayes
parent 0d6882a0f1
commit 40eef75742
4 changed files with 36 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-02-03 Herman A.J. ten Brugge <Haj.Ten.Brugge@net.HCC.nl>
* c4x.c (c4x_hard_regno_rename_ok): New.
* c4x-protos.h (c4x_hard_regno_rename_ok): New.
* c4x.h (HARD_REGNO_RENAME_OK): Define.
Fri Feb 2 20:03:50 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* diagnostic.h: Add missing "extern" in all declarations.

2
gcc/config/c4x/c4x-protos.h
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@ -88,6 +88,8 @@ extern int c4x_check_legit_addr PARAMS ((enum machine_mode, rtx, int));
extern int c4x_hard_regno_mode_ok PARAMS ((unsigned int, enum machine_mode));
extern int c4x_hard_regno_rename_ok PARAMS ((unsigned int, unsigned int));
extern struct rtx_def *c4x_legitimize_address PARAMS ((rtx,
enum machine_mode));

23
gcc/config/c4x/c4x.c
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@ -429,6 +429,29 @@ c4x_hard_regno_mode_ok (regno, mode)
return 0;
}
/* Return non-zero if REGNO1 can be renamed to REGNO2. */
int
c4x_hard_regno_rename_ok (regno1, regno2)
unsigned int regno1;
unsigned int regno2;
{
/* We can not copy call saved registers from mode QI into QF or from
mode QF into QI. */
if ((regno1 == R6_REGNO || regno1 == R7_REGNO)
&& (regno2 == R4_REGNO || regno2 == R5_REGNO || regno2 == R8_REGNO))
return 0;
if ((regno1 == R4_REGNO || regno1 == R5_REGNO || regno1 == R8_REGNO)
&& (regno2 == R6_REGNO || regno2 == R7_REGNO))
return 0;
/* We cannot copy from an extended (40 bit) register to a standard
(32 bit) register because we only set the condition codes for
extended registers. */
if (IS_EXT_REGNO (regno1) && ! IS_EXT_REGNO (regno2))
return 0;
if (IS_EXT_REGNO (regno2) && ! IS_EXT_REGNO (regno1))
return 0;
return 1;
}
/* The TI C3x C compiler register argument runtime model uses 6 registers,
AR2, R2, R3, RC, RS, RE.

5
gcc/config/c4x/c4x.h
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@ -614,6 +614,11 @@ extern const char *c4x_rpts_cycles_string, *c4x_cpu_version_string;
IR0_REGNO, IR1_REGNO, \
SP_REGNO, DP_REGNO, ST_REGNO, IE_REGNO, IF_REGNO, IOF_REGNO}
/* A C expression that is nonzero if hard register number REGNO2 can be
considered for use as a rename register for REGNO1 */
#define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) \
c4x_hard_regno_rename_ok((REGNO1), (REGNO2))
/* Determine which register classes are very likely used by spill registers.
local-alloc.c won't allocate pseudos that have these classes as their