1 --- gcc-4.0.0-20050417/gcc/reload.c.orig 2005-04-19 18:30:49.000000000 +0200
2 +++ gcc-4.0.0-20050417/gcc/reload.c 2005-04-19 18:30:52.000000000 +0200
3 @@ -1520,7 +1520,7 @@ push_reload (rtx in, rtx out, rtx *inloc
4 But if there is no spilling in this block, that is OK.
5 An explicitly used hard reg cannot be a spill reg. */
7 - if (rld[i].reg_rtx == 0 && in != 0)
8 + if (rld[i].reg_rtx == 0 && in != 0 && hard_regs_live_known)
12 @@ -1534,6 +1534,9 @@ push_reload (rtx in, rtx out, rtx *inloc
13 && REG_P (XEXP (note, 0))
14 && (regno = REGNO (XEXP (note, 0))) < FIRST_PSEUDO_REGISTER
15 && reg_mentioned_p (XEXP (note, 0), in)
16 + && (ORIGINAL_REGNO (XEXP (note, 0)) < FIRST_PSEUDO_REGISTER
17 + || ! bitmap_bit_p (ENTRY_BLOCK_PTR->global_live_at_end,
18 + ORIGINAL_REGNO (XEXP (note, 0))))
19 && ! refers_to_regno_for_reload_p (regno,
21 + hard_regno_nregs[regno]
22 @@ -1997,7 +2000,16 @@ find_dummy_reload (rtx real_in, rtx real
23 is a subreg, and in that case, out
25 (GET_MODE (out) != VOIDmode
26 - ? GET_MODE (out) : outmode)))
27 + ? GET_MODE (out) : outmode))
28 + /* But only do all this if we can be sure, that this input
29 + operand doesn't correspond with an uninitialized pseudoreg.
30 + global can assign some hardreg to it, which is the same as
31 + a different pseudo also currently live (as it can ignore the
32 + conflict). So we never must introduce writes to such hardregs,
33 + as they would clobber the other live pseudo using the same. */
34 + && (ORIGINAL_REGNO (in) < FIRST_PSEUDO_REGISTER
35 + || ! bitmap_bit_p (ENTRY_BLOCK_PTR->global_live_at_end,
36 + ORIGINAL_REGNO (in))))
38 unsigned int regno = REGNO (in) + in_offset;
39 unsigned int nwords = hard_regno_nregs[regno][inmode];