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| author | Doug Evans <dje@gnu.org> | 1993-09-24 19:40:36 +0000 |
|---|---|---|
| committer | Doug Evans <dje@gnu.org> | 1993-09-24 19:40:36 +0000 |
| commit | 73a187c146fc166d75bbcacccfb8470b455fdfca (patch) | |
| tree | b3981a3b28094f007a0573f25092fd7e0def7ca4 | |
| parent | 11c50c5efd0f85b2ae515d7b4fd6c3d6ae5d3ecf (diff) | |
| download | gcc-73a187c146fc166d75bbcacccfb8470b455fdfca.zip gcc-73a187c146fc166d75bbcacccfb8470b455fdfca.tar.gz gcc-73a187c146fc166d75bbcacccfb8470b455fdfca.tar.bz2 | |
flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at the end of the function.
* flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at
the end of the function.
(insn_dead_p): Don't delete insns that set the hard frame pointer.
(mark_set_1): Don't add death information about
HARD_FRAME_POINTER_REGNUM.
(mark_used_regs, case REG): Don't put HARD_FRAME_POINTER_REGNUM in
regs_ever_live. Don't mark it as needed either.
* function.c: (instantiate_virtual_regs_1, case MEM): references to
MEM via the hard frame pointer shouldn't be copied.
From-SVN: r5455
| -rw-r--r-- | gcc/flow.c | 23 |
1 files changed, 23 insertions, 0 deletions
@@ -876,6 +876,17 @@ life_analysis (f, nregs) basic_block_new_live_at_end[n_basic_blocks - 1] [FRAME_POINTER_REGNUM / REGSET_ELT_BITS] |= (REGSET_ELT_TYPE) 1 << (FRAME_POINTER_REGNUM % REGSET_ELT_BITS); +#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM + /* If they are different, also mark the hard frame pointer as live */ + basic_block_live_at_end[n_basic_blocks - 1] + [HARD_FRAME_POINTER_REGNUM / REGSET_ELT_BITS] + |= (REGSET_ELT_TYPE) 1 << (HARD_FRAME_POINTER_REGNUM + % REGSET_ELT_BITS); + basic_block_new_live_at_end[n_basic_blocks - 1] + [HARD_FRAME_POINTER_REGNUM / REGSET_ELT_BITS] + |= (REGSET_ELT_TYPE) 1 << (HARD_FRAME_POINTER_REGNUM + % REGSET_ELT_BITS); +#endif } /* Mark all global registers as being live at the end of the function @@ -1549,6 +1560,9 @@ insn_dead_p (x, needed, call_ok) if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno]) /* Make sure insns to set frame pointer aren't deleted. */ || regno == FRAME_POINTER_REGNUM +#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM + || regno == HARD_FRAME_POINTER_REGNUM +#endif #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM /* Make sure insns to set arg pointer are never deleted (if the arg pointer isn't fixed, there will be a USE for @@ -1776,6 +1790,9 @@ mark_set_1 (needed, dead, x, insn, significant) if (GET_CODE (reg) == REG && (regno = REGNO (reg), regno != FRAME_POINTER_REGNUM) +#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM + && regno != HARD_FRAME_POINTER_REGNUM +#endif #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) #endif @@ -2176,6 +2193,9 @@ mark_used_regs (needed, live, x, final, insn) /* For stack ptr or fixed arg pointer, nothing below can be necessary, so waste no more time. */ if (regno == STACK_POINTER_REGNUM +#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM + || regno == HARD_FRAME_POINTER_REGNUM +#endif #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM || (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) #endif @@ -2340,6 +2360,9 @@ mark_used_regs (needed, live, x, final, insn) if (GET_CODE (testreg) == REG && (regno = REGNO (testreg), regno != FRAME_POINTER_REGNUM) +#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM + && regno != HARD_FRAME_POINTER_REGNUM +#endif #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) #endif |