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| author | Joseph Myers <joseph@codesourcery.com> | 2010-08-20 12:14:38 +0100 |
|---|---|---|
| committer | Andrew Stubbs <ams@gcc.gnu.org> | 2010-08-20 11:14:38 +0000 |
| commit | f8fe0a4a8e1df13c21dd0f394740582a4d264f03 (patch) | |
| tree | 2d9f05dc440f7a83a7c9010772e45442652c54fa /gcc/rtlanal.c | |
| parent | 46499993b183dd96d52a050628e409c0512cc411 (diff) | |
| download | gcc-f8fe0a4a8e1df13c21dd0f394740582a4d264f03.zip gcc-f8fe0a4a8e1df13c21dd0f394740582a4d264f03.tar.gz gcc-f8fe0a4a8e1df13c21dd0f394740582a4d264f03.tar.bz2 | |
tm.texi.in (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Document to be zero or nonzero.
2010-08-20 Joseph Myers <joseph@codesourcery.com>
gcc/
* doc/tm.texi.in (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Document to
be zero or nonzero.
* doc/tm.texi: Regenerate.
* defaults.h (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Define.
* df-scan.c (df_get_exit_block_use_set), reginfo.c
(init_reg_sets_1), rtlanal.c (rtx_unstable_p, rtx_varies_p):
Handle new PIC_OFFSET_TABLE_REG_CALL_CLOBBERED semantics.
* config/ia64/ia64.h (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Define
to 1.
From-SVN: r163399
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index f9e6871..4331f41 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -118,13 +118,11 @@ rtx_unstable_p (const_rtx x) /* The arg pointer varies if it is not a fixed register. */ || (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM])) return 0; -#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED /* ??? When call-clobbered, the value is stable modulo the restore that must happen after a call. This currently screws up local-alloc into believing that the restore is not needed. */ - if (x == pic_offset_table_rtx) + if (!PIC_OFFSET_TABLE_REG_CALL_CLOBBERED && x == pic_offset_table_rtx) return 0; -#endif return 1; case ASM_OPERANDS: @@ -197,14 +195,11 @@ rtx_varies_p (const_rtx x, bool for_alias) || (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM])) return 0; if (x == pic_offset_table_rtx -#ifdef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED /* ??? When call-clobbered, the value is stable modulo the restore that must happen after a call. This currently screws up local-alloc into believing that the restore is not needed, so we must return 0 only if we are called from alias analysis. */ - && for_alias -#endif - ) + && (!PIC_OFFSET_TABLE_REG_CALL_CLOBBERED || for_alias)) return 0; return 1; |