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| author | Iain Sandoe <iain@sandoe.co.uk> | 2020-12-11 00:29:42 +0000 |
|---|---|---|
| committer | Iain Sandoe <iain@sandoe.co.uk> | 2021-09-28 20:16:05 +0100 |
| commit | b12d6e79899fd27833c53ffc3c973538244f62e1 (patch) | |
| tree | d4db52cf60ca41b0b56e5611c868809be3702a44 | |
| parent | 45f775f5f813224daed1f2234deacc1c9365009e (diff) | |
| download | gcc-b12d6e79899fd27833c53ffc3c973538244f62e1.zip gcc-b12d6e79899fd27833c53ffc3c973538244f62e1.tar.gz gcc-b12d6e79899fd27833c53ffc3c973538244f62e1.tar.bz2 | |
Darwin, PPC : Fix R13 for PPC64.
We have a somewhat unusual situation in that for PPC64, R13 is
both reserved and callee-saved (it is used internally by the
pthreads implementation to contain pthread_self).
So add R13 to the fixed regs, but also keep it in the callee-
saved set.
gcc/ChangeLog:
* config/rs6000/darwin.h (FIXED_R13): Add for PPC64.
(FIRST_SAVED_GP_REGNO): Save from R13 even when it is one
of the fixed regs.
| -rw-r--r-- | gcc/config/rs6000/darwin.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h index 6abf8e8..120b01f 100644 --- a/gcc/config/rs6000/darwin.h +++ b/gcc/config/rs6000/darwin.h @@ -203,7 +203,7 @@ /* Make both r2 and r13 available for allocation. */ #define FIXED_R2 0 -#define FIXED_R13 0 +#define FIXED_R13 TARGET_64BIT /* Base register for access to local variables of the function. */ @@ -213,6 +213,9 @@ #undef RS6000_PIC_OFFSET_TABLE_REGNUM #define RS6000_PIC_OFFSET_TABLE_REGNUM 31 +#undef FIRST_SAVED_GP_REGNO +#define FIRST_SAVED_GP_REGNO 13 + /* Darwin's stack must remain 16-byte aligned for both 32 and 64 bit ABIs. */ |