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| author | Jeffrey A Law <law@cygnus.com> | 1998-10-19 23:17:48 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-10-19 17:17:48 -0600 |
| commit | 15f8470fd056c08d1c0a47417dafb7092b4b0cc2 (patch) | |
| tree | 5052bd609c1df60e02a325a22e1b34d0d1b5ce7f | |
| parent | 18e765cbda8f41f36ca36ee219e2d53e3b821fba (diff) | |
| download | gcc-15f8470fd056c08d1c0a47417dafb7092b4b0cc2.zip gcc-15f8470fd056c08d1c0a47417dafb7092b4b0cc2.tar.gz gcc-15f8470fd056c08d1c0a47417dafb7092b4b0cc2.tar.bz2 | |
gcse.c (compute_hash_table): Correctly identify hard regs which are clobbered across calls.
* gcse.c (compute_hash_table): Correctly identify hard regs which are
clobbered across calls.
From-SVN: r23191
| -rw-r--r-- | gcc/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/gcse.c | 30 |
2 files changed, 31 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 85b586d..254788d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -19,6 +19,9 @@ Mon Oct 19 13:26:24 1998 Bernd Schmidt <crux@pool.informatik.rwth-aachen.de> Mon Oct 19 11:40:56 1998 Jeffrey A Law (law@cygnus.com) + * gcse.c (compute_hash_table): Correctly identify hard regs which are + clobbered across calls. + * loop.c (scan_loop): Be more selective about what invariants are moved out of a loop. @@ -2075,7 +2075,20 @@ compute_hash_table (f, set_p) if (GET_CODE (insn) == CALL_INSN) { for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) - if (call_used_regs[regno]) + if ((call_used_regs[regno] + && regno != STACK_POINTER_REGNUM +#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM + && regno != HARD_FRAME_POINTER_REGNUM +#endif +#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM + && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) +#endif +#if defined (PIC_OFFSET_TABLE_REGNUM) && !defined (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED) + && ! (regno == PIC_OFFSET_TABLE_REGNUM && flag_pic) +#endif + + && regno != FRAME_POINTER_REGNUM) + || global_regs[regno]) record_last_reg_set_info (insn, regno); if (! CONST_CALL_P (insn)) record_last_mem_set_info (insn); @@ -2548,7 +2561,20 @@ compute_kill_rd () for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) { - if (call_used_regs[regno]) + if ((call_used_regs[regno] + && regno != STACK_POINTER_REGNUM +#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM + && regno != HARD_FRAME_POINTER_REGNUM +#endif +#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM + && ! (regno == ARG_POINTER_REGNUM + && fixed_regs[regno]) +#endif +#if defined (PIC_OFFSET_TABLE_REGNUM) && !defined (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED) + && ! (regno == PIC_OFFSET_TABLE_REGNUM && flag_pic) +#endif + && regno != FRAME_POINTER_REGNUM) + || global_regs[regno]) handle_rd_kill_set (insn, regno, bb); } } |