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| author | Roger Sayle <roger@eyesopen.com> | 2005-01-23 04:51:28 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2005-01-23 04:51:28 +0000 |
| commit | d2ebe27c9a8f400036d9f6a750af21638866c563 (patch) | |
| tree | 986473ca6fe688ccd6093f364c63d788bd1c2ece | |
| parent | 0e69bba9fc926fd529f51aa9e7f585c27b88c1e3 (diff) | |
| download | gcc-d2ebe27c9a8f400036d9f6a750af21638866c563.tar.gz | |
re PR target/19378 (ICE during bootstrap compiling __fixdfdi)
PR middle-end/19378
* config/avr/avr.c (avr_hard_regno_mode_ok): Rewrite.
From-SVN: r94102
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/avr/avr.c | 23 |
2 files changed, 16 insertions, 12 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 10018db6472..07c5b17c5f2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-01-22 Roger Sayle <roger@eyesopen.com> + + PR middle-end/19378 + * config/avr/avr.c (avr_hard_regno_mode_ok): Rewrite. + 2005-01-22 Richard Henderson <rth@redhat.com> PR target/19506 diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index 061a81e6524..0f6b2dee90a 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -5121,23 +5121,22 @@ jump_over_one_insn_p (rtx insn, rtx dest) int avr_hard_regno_mode_ok (int regno, enum machine_mode mode) { - /* Bug workaround: recog.c (peep2_find_free_register) and probably - a few other places assume that the frame pointer is a single hard - register, so r29 may be allocated and overwrite the high byte of - the frame pointer. Do not allow any value to start in r29. */ - if (regno == REG_Y + 1) - return 0; + /* The only thing that can go into registers r28:r29 is a Pmode. */ + if (regno == REG_Y && mode == Pmode) + return 1; - /* Reload can use r28:r29 for reload register and for frame pointer - in one insn. It's wrong. We must disable it. */ - if (mode != Pmode && reload_in_progress && frame_pointer_required_p () - && regno <= REG_Y && (regno + GET_MODE_SIZE (mode)) >= (REG_Y + 1)) + /* Otherwise disallow all regno/mode combinations that span r28:r29. */ + if (regno <= (REG_Y + 1) && (regno + GET_MODE_SIZE (mode)) >= (REG_Y + 1)) return 0; if (mode == QImode) return 1; - /* if (regno < 24 && !AVR_ENHANCED) - return 1;*/ + + /* Modes larger than QImode occupy consecutive registers. */ + if (regno + GET_MODE_SIZE (mode) > FIRST_PSEUDO_REGISTER) + return 0; + + /* All modes larger than QImode should start in an even register. */ return !(regno & 1); } |