+2012-01-31 Richard Sandiford <rdsandiford@googlemail.com>
+
+ * function.h (regno_reg_rtx): Adjust comment.
+ * reginfo.c (init_reg_modes_target): Only use the previous mode
+ if it fits within one register. Remove MIPS comment.
+
2012-01-31 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/52058
};
-/* Indexed by pseudo register number, gives the rtx for that pseudo.
- Allocated in parallel with regno_pointer_align.
- FIXME: We could put it into emit_status struct, but gengtype is not able to deal
- with length attribute nested in top level structures. */
+/* Indexed by register number, gives an rtx for that register (and only
+ that register). For pseudo registers, it is the unique rtx for
+ that pseudo. For hard registers, it is an rtx of the mode specified
+ by reg_raw_mode.
+
+ FIXME: We could put it into emit_status struct, but gengtype is not
+ able to deal with length attribute nested in top level structures. */
extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
{
reg_raw_mode[i] = choose_hard_reg_mode (i, 1, false);
- /* If we couldn't find a valid mode, just use the previous mode.
- ??? One situation in which we need to do this is on the mips where
- HARD_REGNO_NREGS (fpreg, [SD]Fmode) returns 2. Ideally we'd like
- to use DF mode for the even registers and VOIDmode for the odd
- (for the cpu models where the odd ones are inaccessible). */
+ /* If we couldn't find a valid mode, just use the previous mode
+ if it is suitable, otherwise fall back on word_mode. */
if (reg_raw_mode[i] == VOIDmode)
- reg_raw_mode[i] = i == 0 ? word_mode : reg_raw_mode[i-1];
+ {
+ if (i > 0 && hard_regno_nregs[i][reg_raw_mode[i - 1]] == 1)
+ reg_raw_mode[i] = reg_raw_mode[i - 1];
+ else
+ reg_raw_mode[i] = word_mode;
+ }
}
}