diff options
Diffstat (limited to 'meta-aarch64/recipes-devtools/gcc/files/ppc_no_crtsavres.patch')
| -rw-r--r-- | meta-aarch64/recipes-devtools/gcc/files/ppc_no_crtsavres.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/meta-aarch64/recipes-devtools/gcc/files/ppc_no_crtsavres.patch b/meta-aarch64/recipes-devtools/gcc/files/ppc_no_crtsavres.patch new file mode 100644 index 00000000..92a5d9e1 --- /dev/null +++ b/meta-aarch64/recipes-devtools/gcc/files/ppc_no_crtsavres.patch @@ -0,0 +1,72 @@ +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 |