Users of gcc-3.x will need the attached patch _for gcc_ to compile an SH
kernel patched with preempt-kernel. This is _not_ our fault, it is a
gcc bug and is now merged into CVS and should be part of gcc-3.1.
gcc-2.9x compiles without problem. It is only 3.x versions that suffer
the bug.
Robert Love
P.S. Also of note: yes this works on Sega Dreamcast. You can have a
fully preemptible Dreamcast. Impress your friends. Or something.
--- gcc/gcc/alias.c 2001/09/11 21:39:24 1.115.4.7
+++ gcc/gcc/alias.c 2001/11/18 08:16:38 1.115.4.8
@@ -1041,6 +1041,9 @@
/* Some RTL can be compared without a recursive examination. */
switch (code)
{
+ case VALUE:
+ return CSELIB_VAL_PTR (x) == CSELIB_VAL_PTR (y);
+
case REG:
return REGNO (x) == REGNO (y);
@@ -1109,6 +1112,12 @@
if (rtx_equal_for_memref_p (XEXP (x, i), XEXP (y, i)) == 0)
return 0;
break;
+
+ /* This can happen for asm operands. */
+ case 's':
+ if (strcmp (XSTR (x, i), XSTR (y, i)))
+ return 0;
+ break;
/* This can happen for an asm which clobbers memory. */
case '0':
-
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This archive was generated by hypermail 2b29 : Fri Dec 07 2001 - 21:00:30 EST