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| author | Nitin Yewale <nitiny@kpitcummins.com> | 2003-09-05 20:00:03 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2003-09-05 20:00:03 +0000 |
| commit | c87ec0bae2def5ed65950b8fcb54e7225146a7ea (patch) | |
| tree | 2b87ffa541f244e659a763135c0a297e365ee48e /gcc | |
| parent | 31ff3e0b7728ede11862345df0347fc3403a5259 (diff) | |
| download | gcc-c87ec0bae2def5ed65950b8fcb54e7225146a7ea.zip gcc-c87ec0bae2def5ed65950b8fcb54e7225146a7ea.tar.gz gcc-c87ec0bae2def5ed65950b8fcb54e7225146a7ea.tar.bz2 | |
h8300-protos.h: Declare h8300_hard_regno_rename_ok
* config/h8300/h8300-protos.h: Declare h8300_hard_regno_rename_ok
* config/h8300/h8300.h (HARD_REGNO_RENAME_OK): New.
* config/h8300/h8300.c (h8300_hard_regno_rename_ok): New.
From-SVN: r71119
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300.c | 17 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300.h | 6 |
4 files changed, 30 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c0b2e2b..f830816 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-09-05 Nitin Yewale <NitinY@KPITCummins.com> + + * config/h8300/h8300-protos.h: Declare h8300_hard_regno_rename_ok + * config/h8300/h8300.h (HARD_REGNO_RENAME_OK): New. + * config/h8300/h8300.c (h8300_hard_regno_rename_ok): New. + 2003-09-05 Roger Sayle <roger@eyesopen.com> Richard Henderson <rth@redhat.com> diff --git a/gcc/config/h8300/h8300-protos.h b/gcc/config/h8300/h8300-protos.h index d99f0dc..e36ae4b 100644 --- a/gcc/config/h8300/h8300-protos.h +++ b/gcc/config/h8300/h8300-protos.h @@ -98,6 +98,7 @@ extern void h8300_expand_prologue (void); extern void h8300_expand_epilogue (void); extern int h8300_current_function_interrupt_function_p (void); extern int h8300_initial_elimination_offset (int, int); +extern int h8300_hard_regno_rename_ok (unsigned int, unsigned int); struct cpp_reader; extern void h8300_pr_interrupt (struct cpp_reader *); diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c index 5ab2bfac..3d874c2 100644 --- a/gcc/config/h8300/h8300.c +++ b/gcc/config/h8300/h8300.c @@ -4489,6 +4489,23 @@ same_cmp_preceding_p (rtx i3) return (INSN_P (i1) && rtx_equal_p (PATTERN (i1), PATTERN (i3)) && any_condjump_p (i2) && onlyjump_p (i2)); } + +/* Return nonzero if register OLD_REG can be renamed to register NEW_REG. */ + +int +h8300_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED, + unsigned int new_reg) +{ + /* Interrupt functions can only use registers that have already been + saved by the prologue, even if they would normally be + call-clobbered. */ + + if (h8300_current_function_interrupt_function_p () + && !regs_ever_live[new_reg]) + return 0; + + return 1; +} /* Initialize the GCC target structure. */ #undef TARGET_ATTRIBUTE_TABLE diff --git a/gcc/config/h8300/h8300.h b/gcc/config/h8300/h8300.h index 8e5e96e..c4103d0 100644 --- a/gcc/config/h8300/h8300.h +++ b/gcc/config/h8300/h8300.h @@ -350,6 +350,12 @@ extern int target_flags; && ((MODE2) == QImode || (MODE2) == HImode \ || ((TARGET_H8300H || TARGET_H8300S) && (MODE2) == SImode)))) +/* A C expression that is nonzero if hard register NEW_REG can be + considered for use as a rename register for OLD_REG register */ + +#define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ + h8300_hard_regno_rename_ok (OLD_REG, NEW_REG) + /* Specify the registers used for certain standard purposes. The values of these macros are register numbers. */ |