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| author | Daniel Cederman <cederman@gaisler.com> | 2017-11-29 15:45:41 +0000 |
|---|---|---|
| committer | Daniel Hellstrom <danielh@gcc.gnu.org> | 2017-11-29 16:45:41 +0100 |
| commit | 9d52da2f217d5b9a4fef5090251025f6a99bb108 (patch) | |
| tree | 0c8bea143aebc27850e32f59e7ab965457e32546 | |
| parent | 6f9bc5a70fb1066611e42efea9547fa36f398065 (diff) | |
| download | gcc-9d52da2f217d5b9a4fef5090251025f6a99bb108.zip gcc-9d52da2f217d5b9a4fef5090251025f6a99bb108.tar.gz gcc-9d52da2f217d5b9a4fef5090251025f6a99bb108.tar.bz2 | |
[SPARC] Recognize the load when accessing the GOT
Needed for the UT699 errata workaround to function correctly when
compiling with -fPIC.
2017-11-29 Daniel Cederman <cederman@gaisler.com>
gcc/
* config/sparc/sparc.c (sparc_do_work_around_errata): Treat the
movsi_pic_gotdata_op instruction as a load for the UT699 errata
workaround.
From-SVN: r255239
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sparc/sparc.c | 8 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a00174a..1909945 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-11-29 Daniel Cederman <cederman@gaisler.com> + + * config/sparc/sparc.c (sparc_do_work_around_errata): Treat the + movsi_pic_gotdata_op instruction as a load for the UT699 errata + workaround. + 2017-11-29 Martin Aberg <maberg@gaisler.com> * config/sparc/sparc.md (divdf3_fix): Add NOP and adjust length diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index 64c88de..dac6483 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -1321,7 +1321,8 @@ sparc_do_work_around_errata (void) && NONJUMP_INSN_P (insn) && (set = single_set (insn)) != NULL_RTX && GET_MODE_SIZE (GET_MODE (SET_SRC (set))) <= 4 - && mem_ref (SET_SRC (set)) != NULL_RTX + && (mem_ref (SET_SRC (set)) != NULL_RTX + || INSN_CODE (insn) == CODE_FOR_movsi_pic_gotdata_op) && REG_P (SET_DEST (set)) && REGNO (SET_DEST (set)) < 32) { @@ -1359,6 +1360,11 @@ sparc_do_work_around_errata (void) && REGNO (src) != REGNO (x))) && !reg_mentioned_p (x, XEXP (dest, 0))) insert_nop = true; + + /* GOT accesses uses LD. */ + else if (INSN_CODE (next) == CODE_FOR_movsi_pic_gotdata_op + && !reg_mentioned_p (x, XEXP (XEXP (src, 0), 1))) + insert_nop = true; } } |