arm patch is a forward port from OE/classic ppc patch should help in building images with Os (From OE-Core rev: ac9ebcea4a2b778f6dd103a729831d9a9be281df) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
73 lines
3.3 KiB
Diff
73 lines
3.3 KiB
Diff
Upstream-Status: Backport
|
|
|
|
Signed-off-by: Khem Raj
|
|
|
|
Source-url: http://gcc.gnu.org/ml/gcc-patches/2012-05/msg01362.html
|
|
|
|
Currently, powerpc-linux gcc -Os -mno-multiple uses out-of-linux gpr
|
|
save and restore functions when saving/restoring just one gpr. That's
|
|
quite silly since the function call requires more instructions and is
|
|
slower than an inline save/restore. The only case where it might win
|
|
is when no fprs are restored and the restore function can tear down
|
|
the frame and exit (also loading up lr on ppc64). I guess that's how
|
|
GP_SAVE_INLINE came to be like it is, ie. it's optimised for the
|
|
common case using ldm in the prologue and no fprs. Still, it isn't
|
|
difficult to choose the best combination in all cases, but it does
|
|
mean different logic is needed for restores. I could have implemented
|
|
GP_RESTORE_INLINE and FP_RESORE_INLINE macros but it seemed simpler to
|
|
just move everything into the one place the macros are invoked. AIX
|
|
and Darwin register cutoff doesn't change with this patch.
|
|
|
|
This patch also enables out-of-line restores in cases that were
|
|
previously disabled due to using inline saves.
|
|
|
|
Bootstrapped and regression tested powerpc-linux. OK to apply?
|
|
|
|
* aix.h (FP_SAVE_INLINE, GP_SAVE_INLINE): Delete.
|
|
* darwin.h (FP_SAVE_INLINE, GP_SAVE_INLINE): Delete.
|
|
* sysv4.h (FP_SAVE_INLINE, GP_SAVE_INLINE, V_SAVE_INLINE): Delete.
|
|
* config/rs6000/rs6000.c (V_SAVE_INLINE): Delete.
|
|
(rs6000_savres_strategy): Reimplement GP/FP/V_SAVE_INLINE logic.
|
|
For ELF targets, use out-of-line restores for -Os and any number
|
|
of regs if the restore exits, and out-of-line gp save for two or
|
|
more regs. Use save_reg_p to test for holes in reg restore set.
|
|
Replace "#if" with "if".
|
|
|
|
Index: gcc-4_7-branch/gcc/config/rs6000/aix.h
|
|
===================================================================
|
|
--- gcc-4_7-branch.orig/gcc/config/rs6000/aix.h 2012-09-07 12:35:35.000000000 -0700
|
|
+++ gcc-4_7-branch/gcc/config/rs6000/aix.h 2012-09-07 15:27:55.215290315 -0700
|
|
@@ -207,11 +207,6 @@
|
|
{ "link_syscalls", LINK_SYSCALLS_SPEC }, \
|
|
{ "link_libg", LINK_LIBG_SPEC }
|
|
|
|
-/* Define cutoff for using external functions to save floating point. */
|
|
-#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63)
|
|
-/* And similarly for general purpose registers. */
|
|
-#define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
|
|
-
|
|
#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
|
|
|
|
/* No version of AIX fully supports AltiVec or 64-bit instructions in
|
|
Index: gcc-4_7-branch/gcc/config/rs6000/darwin.h
|
|
===================================================================
|
|
--- gcc-4_7-branch.orig/gcc/config/rs6000/darwin.h 2012-09-07 12:35:35.000000000 -0700
|
|
+++ gcc-4_7-branch/gcc/config/rs6000/darwin.h 2012-09-07 15:27:55.223290316 -0700
|
|
@@ -173,16 +173,6 @@
|
|
(RS6000_ALIGN (crtl->outgoing_args_size, 16) \
|
|
+ (STACK_POINTER_OFFSET))
|
|
|
|
-/* Define cutoff for using out-of-line functions to save registers.
|
|
- Currently on Darwin, we implement FP and GPR out-of-line-saves plus the
|
|
- special routine for 'save everything'. */
|
|
-
|
|
-#undef FP_SAVE_INLINE
|
|
-#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) > 60 && (FIRST_REG) < 64)
|
|
-
|
|
-#undef GP_SAVE_INLINE
|
|
-#define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) > 29 && (FIRST_REG) < 32)
|
|
-
|
|
/* Darwin uses a function call if everything needs to be saved/restored. */
|
|
|
|
#undef WORLD_SAVE_P
|